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Primitives","/csharp/system-programming-windows/synchronization-advanced","01.csharp/07.system-programming-windows/07.synchronization-advanced",{"title":308,"path":309,"stem":310},"Синхронізація — Interlocked, Volatile та Lock-Free Структури","/csharp/system-programming-windows/07a.synchronization-advanced-walkthrough","01.csharp/07.system-programming-windows/07a.synchronization-advanced-walkthrough",{"title":312,"path":313,"stem":314},"Interlocked, CAS та Lock-Free Структури","/csharp/system-programming-windows/interlocked-cas-lockfree","01.csharp/07.system-programming-windows/08.interlocked-cas-lockfree",{"title":316,"path":317,"stem":318},"Volatile, Memory Model та Spinning","/csharp/system-programming-windows/08a.volatile-memory-model","01.csharp/07.system-programming-windows/08a.volatile-memory-model",{"title":320,"path":321,"stem":322},"ThreadPool — Пул Потоків для Ефективного 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DbProviderFactory — провайдер-незалежний код","/csharp/ado-net/provider-factory","01.csharp/09.ado-net/07.provider-factory",{"title":438,"path":439,"stem":440},"9.8. Асинхронний доступ до даних","/csharp/ado-net/async-data-access","01.csharp/09.ado-net/08.async-data-access",{"title":442,"path":443,"stem":444},"9.9. Від'єднаний режим: DataSet, DataTable, DataRow","/csharp/ado-net/disconnected-mode-dataset","01.csharp/09.ado-net/09.disconnected-mode-dataset",{"title":446,"path":447,"stem":448},"9.10. DataAdapter — міст між DataSet та базою даних","/csharp/ado-net/data-adapter","01.csharp/09.ado-net/10.data-adapter",{"title":450,"path":451,"stem":452},"9.11. Data Mapper та Repository: Архітектура доступу до даних","/csharp/ado-net/data-mapper-repository","01.csharp/09.ado-net/11.data-mapper-repository",{"title":454,"path":455,"stem":456},"9.12. Identity Map, Unit of Work та Specification Pattern","/csharp/ado-net/advanced-patterns","01.csharp/09.ado-net/12.advanced-patterns",{"title":458,"icon":255,"path":459,"stem":460,"children":461,"page":59},"Ef Core","/csharp/ef-core","01.csharp/10.ef-core",[462,466,470,474,478,482,486,490,494,498,502,506,510,514,518,522,526,532,538,542,546,550,554,558,562,566,570,574,578,582,586,590,594,598,602,606,610,614,618,622,626,630,634,638,642,646],{"title":463,"path":464,"stem":465},"Що таке ORM? Від SQL до об'єктів","/csharp/ef-core/what-is-orm","01.csharp/10.ef-core/01.what-is-orm",{"title":467,"path":468,"stem":469},"Перший проєкт — від нуля до CRUD","/csharp/ef-core/first-project","01.csharp/10.ef-core/02.first-project",{"title":471,"path":472,"stem":473},"DbContext — Серце EF Core","/csharp/ef-core/dbcontext-deep-dive","01.csharp/10.ef-core/03.dbcontext-deep-dive",{"title":475,"path":476,"stem":477},"Провайдери баз даних — Архітектура та Вибір СУБД","/csharp/ef-core/database-providers","01.csharp/10.ef-core/04.database-providers",{"title":479,"path":480,"stem":481},"Конвенції EF Core — Магія без конфігурації","/csharp/ef-core/conventions","01.csharp/10.ef-core/05.conventions",{"title":483,"path":484,"stem":485},"Fluent API та Data Annotations — Явна конфігурація моделі","/csharp/ef-core/fluent-api-vs-annotations","01.csharp/10.ef-core/06.fluent-api-vs-annotations",{"title":487,"path":488,"stem":489},"Зв'язки — One-to-One та One-to-Many","/csharp/ef-core/relationships-basics","01.csharp/10.ef-core/07.relationships-basics",{"title":491,"path":492,"stem":493},"Зв'язки Advanced — Many-to-Many та Складні Сценарії","/csharp/ef-core/relationships-advanced","01.csharp/10.ef-core/08.relationships-advanced",{"title":495,"path":496,"stem":497},"Властивості — Типи, Конвертери, Компаратори (Частина 1)","/csharp/ef-core/property-configuration-part1","01.csharp/10.ef-core/09.property-configuration-part1",{"title":499,"path":500,"stem":501},"Властивості — Value Comparers, Generators, Shadow Properties (Частина 2)","/csharp/ef-core/property-configuration-part2","01.csharp/10.ef-core/09.property-configuration-part2",{"title":503,"path":504,"stem":505},"Складні типи — Owned Types та Complex Types (Частина 1)","/csharp/ef-core/complex-types-owned-part1","01.csharp/10.ef-core/10.complex-types-owned-part1",{"title":507,"path":508,"stem":509},"Складні типи — Complex Types, Keyless Entities, Порівняння (Частина 2)","/csharp/ef-core/complex-types-owned-part2","01.csharp/10.ef-core/10.complex-types-owned-part2",{"title":511,"path":512,"stem":513},"JSON Columns — Складні дані у JSON (Частина 1)","/csharp/ef-core/json-columns-part1","01.csharp/10.ef-core/11.json-columns-part1",{"title":515,"path":516,"stem":517},"JSON Columns — Value Comparers, Індекси, Провайдери (Частина 2)","/csharp/ef-core/json-columns-part2","01.csharp/10.ef-core/11.json-columns-part2",{"title":519,"path":520,"stem":521},"Успадкування — Абстрактні класи та TPH (Частина 1)","/csharp/ef-core/inheritance-part1","01.csharp/10.ef-core/12.inheritance-part1",{"title":523,"path":524,"stem":525},"Успадкування — TPT, TPC та Порівняння Стратегій (Частина 2)","/csharp/ef-core/inheritance-part2","01.csharp/10.ef-core/12.inheritance-part2",{"title":527,"path":528,"stem":529,"children":530},"Індекси, Обмеження та Схема (Частина 1)","/csharp/ef-core/indexes-constraints-part1","01.csharp/10.ef-core/13.indexes-constraints-part1",[531],{"title":527,"path":528,"stem":529},{"title":533,"path":534,"stem":535,"children":536},"Індекси, Обмеження та Схема (Частина 2)","/csharp/ef-core/indexes-constraints-part2","01.csharp/10.ef-core/13.indexes-constraints-part2",[537],{"title":533,"path":534,"stem":535},{"title":539,"path":540,"stem":541},"Seed Data — Початкові Дані (Частина 1)","/csharp/ef-core/seeding-part1","01.csharp/10.ef-core/14.seeding-part1",{"title":543,"path":544,"stem":545},"Seed Data — SQL-скрипти, Bogus та Стратегії (Частина 2)","/csharp/ef-core/seeding-part2","01.csharp/10.ef-core/14.seeding-part2",{"title":547,"path":548,"stem":549},"Global Query Filters — Глобальні Фільтри (Частина 1)","/csharp/ef-core/global-query-filters-part1","01.csharp/10.ef-core/15.global-query-filters-part1",{"title":551,"path":552,"stem":553},"Global Query Filters — Підводні камені та Інтеграція (Частина 2)","/csharp/ef-core/global-query-filters-part2","01.csharp/10.ef-core/15.global-query-filters-part2",{"title":555,"path":556,"stem":557},"LINQ-запити в EF Core (Частина 1)","/csharp/ef-core/linq-queries-part1","01.csharp/10.ef-core/16.linq-queries-part1",{"title":559,"path":560,"stem":561},"LINQ-запити в EF Core (Частина 2)","/csharp/ef-core/linq-queries-part2","01.csharp/10.ef-core/16.linq-queries-part2",{"title":563,"path":564,"stem":565},"Завантаження Пов'язаних Даних (Частина 1)","/csharp/ef-core/loading-related-data-part1","01.csharp/10.ef-core/17.loading-related-data-part1",{"title":567,"path":568,"stem":569},"Завантаження Пов'язаних Даних (Частина 2)","/csharp/ef-core/loading-related-data-part2","01.csharp/10.ef-core/17.loading-related-data-part2",{"title":571,"path":572,"stem":573},"Raw SQL, Views та Stored Procedures (Частина 1)","/csharp/ef-core/raw-sql-part1","01.csharp/10.ef-core/18.raw-sql-part1",{"title":575,"path":576,"stem":577},"Raw SQL — Stored Procedures, DbFunction та Bulk Operations (Частина 2)","/csharp/ef-core/raw-sql-part2","01.csharp/10.ef-core/18.raw-sql-part2",{"title":579,"path":580,"stem":581},"Продвинуті Запити — Compiled Queries, Bulk та Оптимізація (Частина 1)","/csharp/ef-core/advanced-queries-part1","01.csharp/10.ef-core/19.advanced-queries-part1",{"title":583,"path":584,"stem":585},"Продвинуті Запити — Query Tags, Bulk та Interceptors (Частина 2)","/csharp/ef-core/advanced-queries-part2","01.csharp/10.ef-core/19.advanced-queries-part2",{"title":587,"path":588,"stem":589},"Change Tracker — Відстеження Змін (Частина 1)","/csharp/ef-core/change-tracking-part1","01.csharp/10.ef-core/20.change-tracking-part1",{"title":591,"path":592,"stem":593},"Change Tracker — Графи Об'єктів та Disconnected (Частина 2)","/csharp/ef-core/change-tracking-part2","01.csharp/10.ef-core/20.change-tracking-part2",{"title":595,"path":596,"stem":597},"Збереження Даних та Транзакції (Частина 1)","/csharp/ef-core/saving-data-part1","01.csharp/10.ef-core/21.saving-data-part1",{"title":599,"path":600,"stem":601},"Збереження Даних — Concurrency та Outbox (Частина 2)","/csharp/ef-core/saving-data-part2","01.csharp/10.ef-core/21.saving-data-part2",{"title":603,"path":604,"stem":605},"Конкурентність та Блокування (Частина 1)","/csharp/ef-core/concurrency-part1","01.csharp/10.ef-core/22.concurrency-part1",{"title":607,"path":608,"stem":609},"Конкурентність — Дедлоки та Queue Processing (Частина 2)","/csharp/ef-core/concurrency-part2","01.csharp/10.ef-core/22.concurrency-part2",{"title":611,"path":612,"stem":613},"Міграції в EF Core — Основи (Частина 1)","/csharp/ef-core/migrations-basics-part1","01.csharp/10.ef-core/23.migrations-basics-part1",{"title":615,"path":616,"stem":617},"Міграції в EF Core — Основи (Частина 2)","/csharp/ef-core/migrations-basics-part2","01.csharp/10.ef-core/23.migrations-basics-part2",{"title":619,"path":620,"stem":621},"Міграції — Просунуті Сценарії (Частина 1)","/csharp/ef-core/migrations-advanced-part1","01.csharp/10.ef-core/24.migrations-advanced-part1",{"title":623,"path":624,"stem":625},"Міграції — Просунуті Сценарії (Частина 2)","/csharp/ef-core/migrations-advanced-part2","01.csharp/10.ef-core/24.migrations-advanced-part2",{"title":627,"path":628,"stem":629},"Управління Схемою та Database-First (Частина 1)","/csharp/ef-core/schema-management-part1","01.csharp/10.ef-core/25.schema-management-part1",{"title":631,"path":632,"stem":633},"Управління Схемою та Database-First (Частина 2)","/csharp/ef-core/schema-management-part2","01.csharp/10.ef-core/25.schema-management-part2",{"title":635,"path":636,"stem":637},"Продуктивність EF Core — Основи (Частина 1)","/csharp/ef-core/performance-fundamentals-part1","01.csharp/10.ef-core/26.performance-fundamentals-part1",{"title":639,"path":640,"stem":641},"Interceptors в EF Core (Частина 1)","/csharp/ef-core/interceptors-part1","01.csharp/10.ef-core/29.interceptors-part1",{"title":643,"path":644,"stem":645},"Interceptors в EF Core — Connection, Transaction та Materialization (Частина 2)","/csharp/ef-core/interceptors-part2","01.csharp/10.ef-core/29.interceptors-part2",{"title":647,"path":648,"stem":649},"План вивчення Entity Framework Core — Повний курс","/csharp/ef-core/implementation_plan","01.csharp/10.ef-core/implementation_plan",{"title":651,"icon":652,"path":653,"stem":654,"children":655,"page":59},"ASP.NET","i-devicon-dotnetcore","/csharp/aspnet","01.csharp/11.aspnet",[656,730,791,869,927,941,967,1057,1111,1182,1212,1289],{"title":657,"icon":658,"path":659,"stem":660,"children":661,"page":59},"Minimal API","i-lucide-network","/csharp/aspnet/minimal-api","01.csharp/11.aspnet/01.minimal-api",[662,666,670,674,678,682,686,690,694,698,702,706,710,714,718,722,726],{"title":663,"path":664,"stem":665},"Вступ до ASP.NET та еволюція фреймворку","/csharp/aspnet/minimal-api/introduction","01.csharp/11.aspnet/01.minimal-api/01.introduction",{"title":667,"path":668,"stem":669},"Перший додаток на ASP.NET Core","/csharp/aspnet/minimal-api/first-application","01.csharp/11.aspnet/01.minimal-api/02.first-application",{"title":671,"path":672,"stem":673},"WebApplication, Builder та Dependency Injection","/csharp/aspnet/minimal-api/webapplication-builder","01.csharp/11.aspnet/01.minimal-api/03.webapplication-builder",{"title":675,"path":676,"stem":677},"Конвеєр запитів та Middleware","/csharp/aspnet/minimal-api/request-pipeline-middleware","01.csharp/11.aspnet/01.minimal-api/04.request-pipeline-middleware",{"title":679,"path":680,"stem":681},"Маршрутизація в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/routing-basics","01.csharp/11.aspnet/01.minimal-api/05.routing-basics",{"title":683,"path":684,"stem":685},"Маршрутизація в ASP.NET Core: Розширені можливості","/csharp/aspnet/minimal-api/routing-advanced","01.csharp/11.aspnet/01.minimal-api/06.routing-advanced",{"title":687,"path":688,"stem":689},"Статичні файли в ASP.NET Core","/csharp/aspnet/minimal-api/static-files","01.csharp/11.aspnet/01.minimal-api/07.static-files",{"title":691,"path":692,"stem":693},"Статичні Активи: MapStaticAssets (ASP.NET Core 9.0)","/csharp/aspnet/minimal-api/static-assets","01.csharp/11.aspnet/01.minimal-api/08.static-assets",{"title":695,"path":696,"stem":697},"Конфігурація в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/configuration-fundamentals","01.csharp/11.aspnet/01.minimal-api/09.configuration-fundamentals",{"title":699,"path":700,"stem":701},"Конфігурація: Паттерн Options","/csharp/aspnet/minimal-api/configuration-options","01.csharp/11.aspnet/01.minimal-api/10.configuration-options",{"title":703,"path":704,"stem":705},"Логування в ASP.NET Core: Основи","/csharp/aspnet/minimal-api/logging-basics","01.csharp/11.aspnet/01.minimal-api/11.logging-basics",{"title":707,"path":708,"stem":709},"Логування: Serilog та Middleware","/csharp/aspnet/minimal-api/logging-advanced","01.csharp/11.aspnet/01.minimal-api/12.logging-advanced",{"title":711,"path":712,"stem":713},"Управління станом: HttpContext.Items та Cookies","/csharp/aspnet/minimal-api/state-management","01.csharp/11.aspnet/01.minimal-api/13.state-management",{"title":715,"path":716,"stem":717},"Стан сесії: Sessions","/csharp/aspnet/minimal-api/session-state","01.csharp/11.aspnet/01.minimal-api/14.session-state",{"title":719,"path":720,"stem":721},"Структура проєкту: від хаосу до архітектури","/csharp/aspnet/minimal-api/project-structure","01.csharp/11.aspnet/01.minimal-api/15.project-structure",{"title":723,"path":724,"stem":725},"Scalar у Minimal API: повний проєкт і Fluent OpenAPI","/csharp/aspnet/minimal-api/scalar-openapi-fluent","01.csharp/11.aspnet/01.minimal-api/16.scalar-openapi-fluent",{"title":727,"path":728,"stem":729},"Swagger / Swashbuckle у Minimal API: окремий класичний шлях","/csharp/aspnet/minimal-api/swagger-swashbuckle","01.csharp/11.aspnet/01.minimal-api/17.swagger-swashbuckle",{"title":731,"icon":658,"path":732,"stem":733,"children":734,"page":59},"API","/csharp/aspnet/api","01.csharp/11.aspnet/02.api",[735,739,743,747,751,755,759,763,767,771,775,779,783,787],{"title":736,"path":737,"stem":738},"Що таке API. Клієнт-серверна архітектура","/csharp/aspnet/api/what-is-api","01.csharp/11.aspnet/02.api/01.what-is-api",{"title":740,"path":741,"stem":742},"Формати даних: JSON, XML, TOML та бінарні формати","/csharp/aspnet/api/data-formats","01.csharp/11.aspnet/02.api/02.data-formats",{"title":744,"path":745,"stem":746},"Парадигми API та концепція REST","/csharp/aspnet/api/api-paradigms-rest","01.csharp/11.aspnet/02.api/03.api-paradigms-rest",{"title":748,"path":749,"stem":750},"HTTP-методи, статус-коди та заголовки","/csharp/aspnet/api/http-methods-status-codes","01.csharp/11.aspnet/02.api/04.http-methods-status-codes",{"title":752,"path":753,"stem":754},"Організація HTTP API за принципами REST","/csharp/aspnet/api/rest-organizing","01.csharp/11.aspnet/02.api/05.rest-organizing",{"title":756,"path":757,"stem":758},"Номенклатура URL та CRUD-операції","/csharp/aspnet/api/url-nomenclature-crud","01.csharp/11.aspnet/02.api/06.url-nomenclature-crud",{"title":760,"path":761,"stem":762},"Правила дизайну: іменування та стандарти","/csharp/aspnet/api/api-design-naming","01.csharp/11.aspnet/02.api/07.api-design-naming",{"title":764,"path":765,"stem":766},"Валідація, ліміти та обробка помилок","/csharp/aspnet/api/api-design-validation","01.csharp/11.aspnet/02.api/08.api-design-validation",{"title":768,"path":769,"stem":770},"Обробка помилок у Minimal API","/csharp/aspnet/api/error-handling-http","01.csharp/11.aspnet/02.api/09.error-handling-http",{"title":772,"path":773,"stem":774},"Ідемпотентність та синхронізація стану","/csharp/aspnet/api/idempotency-sync","01.csharp/11.aspnet/02.api/10.idempotency-sync",{"title":776,"path":777,"stem":778},"Пагінація та організація списків","/csharp/aspnet/api/pagination-lists","01.csharp/11.aspnet/02.api/11.pagination-lists",{"title":780,"path":781,"stem":782},"Безпека API, кешування та інтернаціоналізація","/csharp/aspnet/api/security-auth","01.csharp/11.aspnet/02.api/12.security-auth",{"title":784,"path":785,"stem":786},"Процес проєктування API та документування","/csharp/aspnet/api/api-design-process","01.csharp/11.aspnet/02.api/13.api-design-process",{"title":788,"path":789,"stem":790},"OpenAPI: контракт, специфікація та документація API","/csharp/aspnet/api/openapi","01.csharp/11.aspnet/02.api/14.openapi",{"title":792,"icon":793,"path":794,"stem":795,"children":796,"page":59},"Auth","i-lucide-shield-check","/csharp/aspnet/auth","01.csharp/11.aspnet/03.auth",[797,801,805,809,813,817,821,825,829,833,837,841,845,849,853,857,861,865],{"title":798,"path":799,"stem":800},"Основи аутентифікації та авторизації","/csharp/aspnet/auth/auth-fundamentals","01.csharp/11.aspnet/03.auth/01.auth-fundamentals",{"title":802,"path":803,"stem":804},"JWT-аутентифікація","/csharp/aspnet/auth/jwt-authentication","01.csharp/11.aspnet/03.auth/02.jwt-authentication",{"title":806,"path":807,"stem":808},"Авторизація: ролі, політики та resource-based доступ","/csharp/aspnet/auth/authorization-policies","01.csharp/11.aspnet/03.auth/03.authorization-policies",{"title":810,"path":811,"stem":812},"Cookie-аутентифікація та ASP.NET Core Identity","/csharp/aspnet/auth/cookie-auth-identity","01.csharp/11.aspnet/03.auth/04.cookie-auth-identity",{"title":814,"path":815,"stem":816},"JWT + Refresh Tokens (HttpOnly Cookie)","/csharp/aspnet/auth/04b.identity-auth-jwt","01.csharp/11.aspnet/03.auth/04b.identity-auth-jwt",{"title":818,"path":819,"stem":820},"Identity: Підтвердження Email та Скидання Пароля","/csharp/aspnet/auth/identity-email-confirmation","01.csharp/11.aspnet/03.auth/05.identity-email-confirmation",{"title":822,"path":823,"stem":824},"Identity: Двофакторна Аутентифікація (2FA)","/csharp/aspnet/auth/identity-two-factor","01.csharp/11.aspnet/03.auth/06.identity-two-factor",{"title":826,"path":827,"stem":828},"Identity: Внутрішня Архітектура та Кастомізація","/csharp/aspnet/auth/identity-internals","01.csharp/11.aspnet/03.auth/07.identity-internals",{"title":830,"path":831,"stem":832},"OAuth 2.0 та зовнішні провайдери","/csharp/aspnet/auth/oauth-external-providers","01.csharp/11.aspnet/03.auth/08.oauth-external-providers",{"title":834,"path":835,"stem":836},"Безпека на практиці: CORS, HTTPS та захист від атак","/csharp/aspnet/auth/security-hardening","01.csharp/11.aspnet/03.auth/09.security-hardening",{"title":838,"path":839,"stem":840},"Теорія OAuth 2.0: Поняття, Аналогії та Флоу","/csharp/aspnet/auth/oauth-theory","01.csharp/11.aspnet/03.auth/10.oauth-theory",{"title":842,"path":843,"stem":844},"OIDC, OAuth 2.0 та Keycloak в ASP.NET Core","/csharp/aspnet/auth/oidc-keycloak","01.csharp/11.aspnet/03.auth/10.oidc-keycloak",{"title":846,"path":847,"stem":848},"API Keys аутентифікація в ASP.NET Core","/csharp/aspnet/auth/api-keys","01.csharp/11.aspnet/03.auth/11.api-keys",{"title":850,"path":851,"stem":852},"Rate Limiting та Throttling в ASP.NET Core","/csharp/aspnet/auth/rate-limiting","01.csharp/11.aspnet/03.auth/12.rate-limiting",{"title":854,"path":855,"stem":856},"Refresh Token Rotation в ASP.NET Core","/csharp/aspnet/auth/refresh-token-rotation","01.csharp/11.aspnet/03.auth/13.refresh-token-rotation",{"title":858,"path":859,"stem":860},"Certificate Authentication та mTLS в ASP.NET Core","/csharp/aspnet/auth/certificate-auth","01.csharp/11.aspnet/03.auth/14.certificate-auth",{"title":862,"path":863,"stem":864},"RBAC, ABAC та ReBAC в ASP.NET Core","/csharp/aspnet/auth/rbac-abac-rebac","01.csharp/11.aspnet/03.auth/15.rbac-abac-rebac",{"title":866,"path":867,"stem":868},"Multi-tenancy та ізоляція даних в ASP.NET Core","/csharp/aspnet/auth/multi-tenancy","01.csharp/11.aspnet/03.auth/16.multi-tenancy",{"title":870,"icon":871,"path":872,"stem":873,"children":874,"page":59},"Нотифікації","i-lucide-bell","/csharp/aspnet/notifications","01.csharp/11.aspnet/04.notifications",[875,879,883,887,891,895,899,903,907,911,915,919,923],{"title":876,"path":877,"stem":878},"In-App нотифікації через базу даних","/csharp/aspnet/notifications/in-app-database-notifications","01.csharp/11.aspnet/04.notifications/01.in-app-database-notifications",{"title":880,"path":881,"stem":882},"Polling: Регулярний запит оновлень","/csharp/aspnet/notifications/polling","01.csharp/11.aspnet/04.notifications/02.polling",{"title":884,"path":885,"stem":886},"Server-Sent Events: Однострімовий push від сервера","/csharp/aspnet/notifications/server-sent-events","01.csharp/11.aspnet/04.notifications/03.server-sent-events",{"title":888,"path":889,"stem":890},"WebSockets: Двостороннє з'єднання в реальному часі","/csharp/aspnet/notifications/websockets","01.csharp/11.aspnet/04.notifications/04.websockets",{"title":892,"path":893,"stem":894},"SignalR: Абстракція над транспортами реального часу","/csharp/aspnet/notifications/signalr","01.csharp/11.aspnet/04.notifications/05.signalr",{"title":896,"path":897,"stem":898},"Background Services: Фонові задачі в ASP.NET Core","/csharp/aspnet/notifications/background-services","01.csharp/11.aspnet/04.notifications/06.background-services",{"title":900,"path":901,"stem":902},"Web Push нотифікації","/csharp/aspnet/notifications/web-push","01.csharp/11.aspnet/04.notifications/07.web-push",{"title":904,"path":905,"stem":906},"Email нотифікації","/csharp/aspnet/notifications/email-notifications","01.csharp/11.aspnet/04.notifications/08.email-notifications",{"title":908,"path":909,"stem":910},"Порівняння підходів: Як вибрати правильну технологію нотифікацій","/csharp/aspnet/notifications/choosing-the-right-approach","01.csharp/11.aspnet/04.notifications/09.choosing-the-right-approach",{"title":912,"path":913,"stem":914},"Hangfire: Надійне планування фонових задач","/csharp/aspnet/notifications/hangfire","01.csharp/11.aspnet/04.notifications/10.hangfire",{"title":916,"path":917,"stem":918},"Практика: Конвертація зображень у WebP через Hangfire","/csharp/aspnet/notifications/hangfire-image-webp","01.csharp/11.aspnet/04.notifications/11.hangfire-image-webp",{"title":920,"path":921,"stem":922},"Практика: Підготовка відео до HLS-стрімінгу через Hangfire","/csharp/aspnet/notifications/hangfire-video-hls","01.csharp/11.aspnet/04.notifications/12.hangfire-video-hls",{"title":924,"path":925,"stem":926},"Telegram-нотифікації: від одного повідомлення до масових розсилок і мульти-канального підходу","/csharp/aspnet/notifications/telegram-notifications","01.csharp/11.aspnet/04.notifications/13.telegram-notifications",{"title":928,"icon":929,"path":930,"stem":931,"children":932,"page":59},"Інтернаціоналізація","i-lucide-languages","/csharp/aspnet/i18n","01.csharp/11.aspnet/05.i18n",[933,937],{"title":934,"path":935,"stem":936},"Інтернаціоналізація (i18n) у Minimal API: від A до Я","/csharp/aspnet/i18n/internationalization","01.csharp/11.aspnet/05.i18n/01.internationalization",{"title":938,"path":939,"stem":940},"Humanizer: людиномовні рядки у .NET","/csharp/aspnet/i18n/humanizer","01.csharp/11.aspnet/05.i18n/02.humanizer",{"title":942,"icon":943,"path":944,"stem":945,"children":946,"page":59},"Кешування","i-lucide-layers","/csharp/aspnet/caching","01.csharp/11.aspnet/06.caching",[947,951,955,959,963],{"title":948,"path":949,"stem":950},"Огляд кешування: чотири рівні і коли що обирати","/csharp/aspnet/caching/caching","01.csharp/11.aspnet/06.caching/01.caching",{"title":952,"path":953,"stem":954},"IMemoryCache: кеш в оперативній пам'яті","/csharp/aspnet/caching/memory-cache","01.csharp/11.aspnet/06.caching/02.memory-cache",{"title":956,"path":957,"stem":958},"IDistributedCache і Redis: розподілений кеш","/csharp/aspnet/caching/distributed-cache","01.csharp/11.aspnet/06.caching/03.distributed-cache",{"title":960,"path":961,"stem":962},"Response Cache: HTTP-кешування через Cache-Control","/csharp/aspnet/caching/response-cache","01.csharp/11.aspnet/06.caching/04.response-cache",{"title":964,"path":965,"stem":966},"Output Cache: серверний кеш HTTP-відповідей (.NET 7+)","/csharp/aspnet/caching/output-cache","01.csharp/11.aspnet/06.caching/05.output-cache",{"title":968,"icon":969,"path":970,"stem":971,"children":972,"page":59},"Тестування","i-lucide-test-tube","/csharp/aspnet/testing","01.csharp/11.aspnet/07.testing",[973,977,981,985,989,993,997,1001,1005,1009,1013,1017,1021,1025,1029,1033,1037,1041,1045,1049,1053],{"title":974,"path":975,"stem":976},"Що таке тестування? Від інтуїції до науки","/csharp/aspnet/testing/what-is-testing","01.csharp/11.aspnet/07.testing/01.what-is-testing",{"title":978,"path":979,"stem":980},"Піраміда тестування — Стратегія, а не Догма","/csharp/aspnet/testing/testing-pyramid","01.csharp/11.aspnet/07.testing/02.testing-pyramid",{"title":982,"path":983,"stem":984},"Дві Школи Тестування — Лондон проти Детройту","/csharp/aspnet/testing/testing-schools","01.csharp/11.aspnet/07.testing/03.testing-schools",{"title":986,"path":987,"stem":988},"TDD та BDD — Тести як Дизайн-інструмент","/csharp/aspnet/testing/tdd-and-bdd","01.csharp/11.aspnet/07.testing/04.tdd-and-bdd",{"title":990,"path":991,"stem":992},"Що саме тестувати — Техніки аналізу та Циклomatична складність","/csharp/aspnet/testing/what-to-test","01.csharp/11.aspnet/07.testing/05.what-to-test",{"title":994,"path":995,"stem":996},"Тестові Фреймворки — Навіщо вони і що всередині","/csharp/aspnet/testing/test-frameworks","01.csharp/11.aspnet/07.testing/06.test-frameworks",{"title":998,"path":999,"stem":1000},"xUnit — Факти, Теорії та Lifecycle тестів","/csharp/aspnet/testing/xunit-basics","01.csharp/11.aspnet/07.testing/07.xunit-basics",{"title":1002,"path":1003,"stem":1004},"xUnit Advanced — Fixtures, Кастомізація та Розширення","/csharp/aspnet/testing/xunit-advanced","01.csharp/11.aspnet/07.testing/08.xunit-advanced",{"title":1006,"path":1007,"stem":1008},"Moq — Глибоке занурення в мокування","/csharp/aspnet/testing/mocking-with-moq","01.csharp/11.aspnet/07.testing/09.mocking-with-moq",{"title":1010,"path":1011,"stem":1012},"Тестування Баз Даних — EF Core, SQLite та Testcontainers","/csharp/aspnet/testing/database-testing","01.csharp/11.aspnet/07.testing/10.database-testing",{"title":1014,"path":1015,"stem":1016},"Integration Testing — Частина 1 [Теорія та WebApplicationFactory]","/csharp/aspnet/testing/integration-testing","01.csharp/11.aspnet/07.testing/11.integration-testing",{"title":1018,"path":1019,"stem":1020},"Інтеграційне тестування — Практика","/csharp/aspnet/testing/11a.integration-testing-practice","01.csharp/11.aspnet/07.testing/11a.integration-testing-practice",{"title":1022,"path":1023,"stem":1024},"Integration Testing — Частина 2 [Просунуті Сценарії та Testcontainers]","/csharp/aspnet/testing/integration-testing-advanced","01.csharp/11.aspnet/07.testing/12.integration-testing-advanced",{"title":1026,"path":1027,"stem":1028},"Професійний Postman: Колекції, Змінні та GitHub Інтеграція","/csharp/aspnet/testing/postman-professional","01.csharp/11.aspnet/07.testing/13.postman-professional",{"title":1030,"path":1031,"stem":1032},"HttpClient у Тестах Частина 1: Архітектура та MockHttpMessageHandler","/csharp/aspnet/testing/httpclient-testing","01.csharp/11.aspnet/07.testing/14.httpclient-testing",{"title":1034,"path":1035,"stem":1036},"HttpClient у Тестах Частина 2: WireMock.Net та Resilience","/csharp/aspnet/testing/wiremock-net","01.csharp/11.aspnet/07.testing/15.wiremock-net",{"title":1038,"path":1039,"stem":1040},"Патерни та Анти-патерни Тестування: Test Smells","/csharp/aspnet/testing/testing-patterns","01.csharp/11.aspnet/07.testing/16.testing-patterns",{"title":1042,"path":1043,"stem":1044},"Просунуті інструменти: Time, Snapshots та Властивості","/csharp/aspnet/testing/advanced-testing-tools","01.csharp/11.aspnet/07.testing/17.advanced-testing-tools",{"title":1046,"path":1047,"stem":1048},"Тестування Архітектури з NetArchTest","/csharp/aspnet/testing/architecture-testing","01.csharp/11.aspnet/07.testing/18.architecture-testing",{"title":1050,"path":1051,"stem":1052},"Тестування Продуктивності: BenchmarkDotNet, NBomber та k6","/csharp/aspnet/testing/performance-testing","01.csharp/11.aspnet/07.testing/19.performance-testing",{"title":1054,"path":1055,"stem":1056},"Залишок плану для курсу \"Тестування ASP.NET Minimal API\"","/csharp/aspnet/testing/remaining_plan","01.csharp/11.aspnet/07.testing/remaining_plan",{"title":1058,"icon":1059,"path":1060,"stem":1061,"children":1062,"page":59},"Платежі","i-lucide-credit-card","/csharp/aspnet/payments","01.csharp/11.aspnet/08.payments",[1063,1067,1071,1075,1079,1083,1087,1091,1095,1099,1103,1107],{"title":1064,"path":1065,"stem":1066},"Основи платіжної інфраструктури","/csharp/aspnet/payments/payment-fundamentals","01.csharp/11.aspnet/08.payments/01.payment-fundamentals",{"title":1068,"path":1069,"stem":1070},"Методи оплати в Україні","/csharp/aspnet/payments/payment-methods-ukraine","01.csharp/11.aspnet/08.payments/02.payment-methods-ukraine",{"title":1072,"path":1073,"stem":1074},"PCI DSS та безпека платежів","/csharp/aspnet/payments/pci-dss-security","01.csharp/11.aspnet/08.payments/03.pci-dss-security",{"title":1076,"path":1077,"stem":1078},"Архітектура платіжної підсистеми","/csharp/aspnet/payments/payment-architecture","01.csharp/11.aspnet/08.payments/04.payment-architecture",{"title":1080,"path":1081,"stem":1082},"Інтеграція LiqPay (ПриватБанк)","/csharp/aspnet/payments/liqpay-integration","01.csharp/11.aspnet/08.payments/05.liqpay-integration",{"title":1084,"path":1085,"stem":1086},"Інтеграція Monobank Acquiring API","/csharp/aspnet/payments/monobank-acquiring","01.csharp/11.aspnet/08.payments/06.monobank-acquiring",{"title":1088,"path":1089,"stem":1090},"Інтеграція Stripe","/csharp/aspnet/payments/stripe-integration","01.csharp/11.aspnet/08.payments/07.stripe-integration",{"title":1092,"path":1093,"stem":1094},"Webhooks — глибоке занурення","/csharp/aspnet/payments/webhooks-deep-dive","01.csharp/11.aspnet/08.payments/08.webhooks-deep-dive",{"title":1096,"path":1097,"stem":1098},"Підписки та рекурентні платежі","/csharp/aspnet/payments/subscriptions-recurring","01.csharp/11.aspnet/08.payments/09.subscriptions-recurring",{"title":1100,"path":1101,"stem":1102},"Повернення коштів та диспути","/csharp/aspnet/payments/refunds-disputes","01.csharp/11.aspnet/08.payments/10.refunds-disputes",{"title":1104,"path":1105,"stem":1106},"Тестування платіжних інтеграцій","/csharp/aspnet/payments/testing-payments","01.csharp/11.aspnet/08.payments/11.testing-payments",{"title":1108,"path":1109,"stem":1110},"Чекліст виходу в Production","/csharp/aspnet/payments/production-checklist","01.csharp/11.aspnet/08.payments/12.production-checklist",{"title":1112,"icon":1113,"items":1114,"path":1127,"stem":1128,"children":1129,"page":59},"Популярні бібліотеки","lucide:box",[1115,1116,1117,1118,1119,1120,1121,1122,1123,1124,1125,1126],"01.fluent-validation","02.mapster","03.erroror-result-pattern","04.serilog","05.mediatr","06.polly","07.health-checks","08.feature-management","09.fluent-email","10.quest-pdf","11.bogus","12.humanizer-guard","/csharp/aspnet/libraries","01.csharp/11.aspnet/09.libraries",[1130,1134,1138,1142,1146,1150,1154,1158,1162,1166,1170,1174,1178],{"title":1131,"path":1132,"stem":1133},"Валідація з FluentValidation в ASP.NET Core","/csharp/aspnet/libraries/fluent-validation","01.csharp/11.aspnet/09.libraries/01.fluent-validation",{"title":1135,"path":1136,"stem":1137},"Маппінг об","/csharp/aspnet/libraries/mapster","01.csharp/11.aspnet/09.libraries/02.mapster",{"title":1139,"path":1140,"stem":1141},"Обробка помилок з ErrorOr та Result Pattern в ASP.NET Core","/csharp/aspnet/libraries/erroror-result-pattern","01.csharp/11.aspnet/09.libraries/03.erroror-result-pattern",{"title":1143,"path":1144,"stem":1145},"Структуроване логування з Serilog в ASP.NET Core","/csharp/aspnet/libraries/serilog","01.csharp/11.aspnet/09.libraries/04.serilog",{"title":1147,"path":1148,"stem":1149},"CQRS та Mediator з MediatR в ASP.NET Core","/csharp/aspnet/libraries/mediatr","01.csharp/11.aspnet/09.libraries/05.mediatr",{"title":1151,"path":1152,"stem":1153},"Відмовостійкість з Polly в ASP.NET Core","/csharp/aspnet/libraries/polly","01.csharp/11.aspnet/09.libraries/06.polly",{"title":1155,"path":1156,"stem":1157},"Health Checks в ASP.NET Core","/csharp/aspnet/libraries/health-checks","01.csharp/11.aspnet/09.libraries/07.health-checks",{"title":1159,"path":1160,"stem":1161},"Feature Management та Feature Flags в ASP.NET Core","/csharp/aspnet/libraries/feature-management","01.csharp/11.aspnet/09.libraries/08.feature-management",{"title":1163,"path":1164,"stem":1165},"Відправка Email з FluentEmail в ASP.NET Core","/csharp/aspnet/libraries/fluent-email","01.csharp/11.aspnet/09.libraries/09.fluent-email",{"title":1167,"path":1168,"stem":1169},"Генерація PDF з QuestPDF в ASP.NET Core","/csharp/aspnet/libraries/quest-pdf","01.csharp/11.aspnet/09.libraries/10.quest-pdf",{"title":1171,"path":1172,"stem":1173},"Генерація тестових даних з Bogus в ASP.NET Core","/csharp/aspnet/libraries/bogus","01.csharp/11.aspnet/09.libraries/11.bogus",{"title":1175,"path":1176,"stem":1177},"Humanizer та Guard Clauses в ASP.NET Core","/csharp/aspnet/libraries/humanizer-guard","01.csharp/11.aspnet/09.libraries/12.humanizer-guard",{"title":1179,"path":1180,"stem":1181},"План модуля 10.libraries — Популярні бібліотеки ASP.NET","/csharp/aspnet/libraries/plan","01.csharp/11.aspnet/09.libraries/plan",{"title":1183,"icon":1184,"path":1185,"stem":1186,"children":1187,"page":59},"Razor Pages","i-lucide-layout-template","/csharp/aspnet/razor-pages","01.csharp/11.aspnet/10.razor-pages",[1188,1192,1196,1200,1204,1208],{"title":1189,"path":1190,"stem":1191},"Від Minimal API до Razor Pages: концептуальний перехід","/csharp/aspnet/razor-pages/from-minimal-api","01.csharp/11.aspnet/10.razor-pages/01.from-minimal-api",{"title":1193,"path":1194,"stem":1195},"PageModel: логіка сторінки Razor Pages","/csharp/aspnet/razor-pages/page-model","01.csharp/11.aspnet/10.razor-pages/02.page-model",{"title":1197,"path":1198,"stem":1199},"Razor синтаксис: шаблонізатор у .cshtml","/csharp/aspnet/razor-pages/razor-syntax","01.csharp/11.aspnet/10.razor-pages/03.razor-syntax",{"title":1201,"path":1202,"stem":1203},"Tag Helpers: типізований HTML","/csharp/aspnet/razor-pages/tag-helpers","01.csharp/11.aspnet/10.razor-pages/04.tag-helpers",{"title":1205,"path":1206,"stem":1207},"Форми і валідація: повний цикл обробки даних","/csharp/aspnet/razor-pages/forms-validation","01.csharp/11.aspnet/10.razor-pages/05.forms-validation",{"title":1209,"path":1210,"stem":1211},"Практичний проєкт: TaskManager на Razor Pages","/csharp/aspnet/razor-pages/project-task-manager","01.csharp/11.aspnet/10.razor-pages/06.project-task-manager",{"title":1213,"path":1214,"stem":1215,"children":1216,"page":59},"ASP.NET Core MVC","/csharp/aspnet/mvc","01.csharp/11.aspnet/11.mvc",[1217,1221,1225,1229,1233,1237,1241,1245,1249,1253,1257,1261,1265,1269,1273,1277,1281,1285],{"title":1218,"path":1219,"stem":1220},"Патерн MVC: архітектура, що змінила веб","/csharp/aspnet/mvc/mvc-pattern","01.csharp/11.aspnet/11.mvc/01.mvc-pattern",{"title":1222,"path":1223,"stem":1224},"Від Razor Pages до MVC: концептуальний перехід","/csharp/aspnet/mvc/from-razor-pages","01.csharp/11.aspnet/11.mvc/02.from-razor-pages",{"title":1226,"path":1227,"stem":1228},"Controllers та Actions: серце MVC","/csharp/aspnet/mvc/controllers-actions","01.csharp/11.aspnet/11.mvc/03.controllers-actions",{"title":1230,"path":1231,"stem":1232},"Маршрутизація в MVC: Convention vs Attribute Routing","/csharp/aspnet/mvc/routing-mvc","01.csharp/11.aspnet/11.mvc/04.routing-mvc",{"title":1234,"path":1235,"stem":1236},"Model Binding: від HTTP до C#","/csharp/aspnet/mvc/model-binding","01.csharp/11.aspnet/11.mvc/05.model-binding",{"title":1238,"path":1239,"stem":1240},"Views, ViewData, ViewBag, TempData і ViewModel","/csharp/aspnet/mvc/views-viewdata-tempdata","01.csharp/11.aspnet/11.mvc/06.views-viewdata-tempdata",{"title":1242,"path":1243,"stem":1244},"Filters: аспектно-орієнтоване програмування в MVC","/csharp/aspnet/mvc/filters","01.csharp/11.aspnet/11.mvc/07.filters",{"title":1246,"path":1247,"stem":1248},"Areas: структурування великих застосунків","/csharp/aspnet/mvc/areas","01.csharp/11.aspnet/11.mvc/08.areas",{"title":1250,"path":1251,"stem":1252},"View Components: повторювані незалежні блоки UI","/csharp/aspnet/mvc/view-components","01.csharp/11.aspnet/11.mvc/09.view-components",{"title":1254,"path":1255,"stem":1256},"Display та Editor Templates","/csharp/aspnet/mvc/display-editor-templates","01.csharp/11.aspnet/11.mvc/10.display-editor-templates",{"title":1258,"path":1259,"stem":1260},"Валідація: IValidatableObject та FluentValidation","/csharp/aspnet/mvc/validation-advanced","01.csharp/11.aspnet/11.mvc/11.validation-advanced",{"title":1262,"path":1263,"stem":1264},"HTMX: інтерактивність через HTML-атрибути","/csharp/aspnet/mvc/htmx","01.csharp/11.aspnet/11.mvc/12.htmx",{"title":1266,"path":1267,"stem":1268},"HTMX у ASP.NET Core MVC: серверна інтеграція","/csharp/aspnet/mvc/ajax-htmx-mvc","01.csharp/11.aspnet/11.mvc/13.ajax-htmx-mvc",{"title":1270,"path":1271,"stem":1272},"Практичний проєкт: Каталог товарів з HTMX","/csharp/aspnet/mvc/htmx-project","01.csharp/11.aspnet/11.mvc/14.htmx-project",{"title":1274,"path":1275,"stem":1276},"Завантаження та обробка файлів","/csharp/aspnet/mvc/file-upload","01.csharp/11.aspnet/11.mvc/15.file-upload",{"title":1278,"path":1279,"stem":1280},"Глобалізація та Локалізація MVC","/csharp/aspnet/mvc/globalization-localization","01.csharp/11.aspnet/11.mvc/16.globalization-localization",{"title":1282,"path":1283,"stem":1284},"Підсумковий проєкт: Блог-платформа","/csharp/aspnet/mvc/mvc-project","01.csharp/11.aspnet/11.mvc/17.mvc-project",{"title":1286,"path":1287,"stem":1288},"План курсу: ASP.NET Core MVC","/csharp/aspnet/mvc/plan","01.csharp/11.aspnet/11.mvc/plan",{"title":1290,"path":1291,"stem":1292,"children":1293,"page":59},"Web Api","/csharp/aspnet/web-api","01.csharp/11.aspnet/12.web-api",[1294,1298,1302,1306,1310,1314,1318,1322,1326,1330,1334,1338,1342],{"title":1295,"path":1296,"stem":1297},"Від Minimal API до Controller-based API","/csharp/aspnet/web-api/from-minimal-api-to-controllers","01.csharp/11.aspnet/12.web-api/01.from-minimal-api-to-controllers",{"title":1299,"path":1300,"stem":1301},"ControllerBase, ActionResult\u003CT> та Response Types","/csharp/aspnet/web-api/controller-base-actionresult","01.csharp/11.aspnet/12.web-api/02.controller-base-actionresult",{"title":1303,"path":1304,"stem":1305},"Content Negotiation - JSON, XML та власні форматери","/csharp/aspnet/web-api/content-negotiation","01.csharp/11.aspnet/12.web-api/03.content-negotiation",{"title":1307,"path":1308,"stem":1309},"Версіонування API","/csharp/aspnet/web-api/api-versioning","01.csharp/11.aspnet/12.web-api/04.api-versioning",{"title":1311,"path":1312,"stem":1313},"ProblemDetails та структурована обробка помилок","/csharp/aspnet/web-api/problemdetails-error-handling","01.csharp/11.aspnet/12.web-api/05.problemdetails-error-handling",{"title":1315,"path":1316,"stem":1317},"Фільтри у Web API контексті","/csharp/aspnet/web-api/filters-for-api","01.csharp/11.aspnet/12.web-api/06.filters-for-api",{"title":1319,"path":1320,"stem":1321},"Пагінація, фільтрація та сортування","/csharp/aspnet/web-api/pagination-filtering-sorting","01.csharp/11.aspnet/12.web-api/07.pagination-filtering-sorting",{"title":1323,"path":1324,"stem":1325},"HATEOAS та Resource Expansion","/csharp/aspnet/web-api/hateoas-resource-expansion","01.csharp/11.aspnet/12.web-api/08.hateoas-resource-expansion",{"title":1327,"path":1328,"stem":1329},"Гібридна архітектура - Minimal API + Controllers","/csharp/aspnet/web-api/minimal-api-vs-controllers-hybrid","01.csharp/11.aspnet/12.web-api/09.minimal-api-vs-controllers-hybrid",{"title":1331,"path":1332,"stem":1333},"Документація API - Swashbuckle, NSwag та генерація клієнтів","/csharp/aspnet/web-api/api-documentation-generation","01.csharp/11.aspnet/12.web-api/10.api-documentation-generation",{"title":1335,"path":1336,"stem":1337},"Health Checks та моніторинг API","/csharp/aspnet/web-api/health-checks-monitoring","01.csharp/11.aspnet/12.web-api/11.health-checks-monitoring",{"title":1339,"path":1340,"stem":1341},"Підсумковий проєкт - Production-Ready REST API","/csharp/aspnet/web-api/web-api-project","01.csharp/11.aspnet/12.web-api/12.web-api-project",{"title":1343,"path":1344,"stem":1345},"План курсу: ASP.NET Core Web API (Controllers)","/csharp/aspnet/web-api/plan","01.csharp/11.aspnet/12.web-api/plan",{"title":1347,"icon":1348,"path":1349,"stem":1350,"children":1351,"page":59},"Desktop UI","i-lucide-app-window","/csharp/desktop-ui","01.csharp/12.desktop-ui",[1352,1356,1360,1364,1368,1372,1376,1380,1384,1388,1392,1396,1400,1404,1408,1412,1416,1420,1424,1428,1432,1436,1440,1444,1448,1452,1456,1460,1464,1468,1472,1476,1480,1484,1488,1492,1496,1500,1504,1508,1512,1516,1520,1524,1528,1532,1536,1540,1544,1548,1552,1556,1560,1564,1568,1572,1576,1580,1584,1588,1592,1596,1600,1604,1608,1612,1616,1620,1624,1628,1632],{"title":1353,"path":1354,"stem":1355},"Що таке десктопна розробка?","/csharp/desktop-ui/what-is-desktop-dev","01.csharp/12.desktop-ui/01.what-is-desktop-dev",{"title":1357,"path":1358,"stem":1359},"Архітектура WPF — як влаштований графічний інтерфейс","/csharp/desktop-ui/wpf-architecture","01.csharp/12.desktop-ui/02.wpf-architecture",{"title":1361,"path":1362,"stem":1363},"Перший WPF-проєкт — від нуля до вікна","/csharp/desktop-ui/first-wpf-app","01.csharp/12.desktop-ui/03.first-wpf-app",{"title":1365,"path":1366,"stem":1367},"Перший Avalonia-проєкт: WPF для всіх платформ","/csharp/desktop-ui/03a.first-avalonia-app","01.csharp/12.desktop-ui/03a.first-avalonia-app",{"title":1369,"path":1370,"stem":1371},"XAML: декларативний інтерфейс","/csharp/desktop-ui/xaml-basics","01.csharp/12.desktop-ui/04.xaml-basics",{"title":1373,"path":1374,"stem":1375},"Fluent UI у WPF — сучасний дизайн Windows 11","/csharp/desktop-ui/04a.wpf-fluent-ui","01.csharp/12.desktop-ui/04a.wpf-fluent-ui",{"title":1377,"path":1378,"stem":1379},"WPF UI — сучасна бібліотека Fluent контролів","/csharp/desktop-ui/04b.wpf-ui-library","01.csharp/12.desktop-ui/04b.wpf-ui-library",{"title":1381,"path":1382,"stem":1383},"HandyControl — велика бібліотека UI контролів для WPF","/csharp/desktop-ui/04c.handycontrol-library","01.csharp/12.desktop-ui/04c.handycontrol-library",{"title":1385,"path":1386,"stem":1387},"Простори імен та ресурси XAML","/csharp/desktop-ui/xaml-namespaces-resources","01.csharp/12.desktop-ui/05.xaml-namespaces-resources",{"title":1389,"path":1390,"stem":1391},"XAML в Avalonia: ключові відмінності від WPF","/csharp/desktop-ui/05a.avalonia-xaml-differences","01.csharp/12.desktop-ui/05a.avalonia-xaml-differences",{"title":1393,"path":1394,"stem":1395},"Розширення розмітки XAML (Markup Extensions)","/csharp/desktop-ui/xaml-markup-extensions","01.csharp/12.desktop-ui/06.xaml-markup-extensions",{"title":1397,"path":1398,"stem":1399},"Панелі Layout: StackPanel, WrapPanel, DockPanel","/csharp/desktop-ui/layout-panels-part1","01.csharp/12.desktop-ui/07.layout-panels-part1",{"title":1401,"path":1402,"stem":1403},"Grid, Canvas, UniformGrid","/csharp/desktop-ui/layout-panels-part2","01.csharp/12.desktop-ui/07.layout-panels-part2",{"title":1405,"path":1406,"stem":1407},"Просунуті техніки Layout","/csharp/desktop-ui/layout-advanced","01.csharp/12.desktop-ui/08.layout-advanced",{"title":1409,"path":1410,"stem":1411},"Адаптивний Layout та найкращі практики","/csharp/desktop-ui/layout-responsive","01.csharp/12.desktop-ui/09.layout-responsive",{"title":1413,"path":1414,"stem":1415},"Layout в Avalonia: відмінності та нові можливості","/csharp/desktop-ui/09a.layout-avalonia","01.csharp/12.desktop-ui/09a.layout-avalonia",{"title":1417,"path":1418,"stem":1419},"Button, Image, ProgressBar та інші базові контроли","/csharp/desktop-ui/basic-controls","01.csharp/12.desktop-ui/10.basic-controls",{"title":1421,"path":1422,"stem":1423},"Контроли в Avalonia: відмінності від WPF","/csharp/desktop-ui/10a.controls-avalonia","01.csharp/12.desktop-ui/10a.controls-avalonia",{"title":1425,"path":1426,"stem":1427},"Текстові контроли — TextBlock, TextBox, RichTextBox","/csharp/desktop-ui/text-controls","01.csharp/12.desktop-ui/11.text-controls",{"title":1429,"path":1430,"stem":1431},"Контроли вибору — CheckBox, RadioButton, ComboBox, ListBox, DatePicker","/csharp/desktop-ui/selection-controls","01.csharp/12.desktop-ui/12.selection-controls",{"title":1433,"path":1434,"stem":1435},"Content Model — GroupBox, Expander, TabControl, StatusBar","/csharp/desktop-ui/content-controls","01.csharp/12.desktop-ui/13.content-controls",{"title":1437,"path":1438,"stem":1439},"UI/UX принципи десктопних застосунків","/csharp/desktop-ui/13a.ui-ux-principles","01.csharp/12.desktop-ui/13a.ui-ux-principles",{"title":1441,"path":1442,"stem":1443},"Dependency Properties — Концепція та Value Resolution","/csharp/desktop-ui/dependency-properties-part1","01.csharp/12.desktop-ui/14.dependency-properties-part1",{"title":1445,"path":1446,"stem":1447},"Avalonia Property System — StyledProperty та DirectProperty","/csharp/desktop-ui/14a.avalonia-property-system","01.csharp/12.desktop-ui/14a.avalonia-property-system",{"title":1449,"path":1450,"stem":1451},"Attached Properties — Властивості без меж","/csharp/desktop-ui/attached-properties","01.csharp/12.desktop-ui/15.attached-properties",{"title":1453,"path":1454,"stem":1455},"Routed Events — Маршрутизація подій у WPF","/csharp/desktop-ui/routed-events","01.csharp/12.desktop-ui/16.routed-events",{"title":1457,"path":1458,"stem":1459},"Data Binding — Від Code-Behind до Декларативності","/csharp/desktop-ui/data-binding-basics-part1","01.csharp/12.desktop-ui/17.data-binding-basics-part1",{"title":1461,"path":1462,"stem":1463},"INotifyPropertyChanged — Живе оновлення UI","/csharp/desktop-ui/data-binding-basics-part2","01.csharp/12.desktop-ui/17.data-binding-basics-part2",{"title":1465,"path":1466,"stem":1467},"Compiled Bindings в Avalonia — Безпека на етапі компіляції","/csharp/desktop-ui/17a.avalonia-compiled-bindings","01.csharp/12.desktop-ui/17a.avalonia-compiled-bindings",{"title":1469,"path":1470,"stem":1471},"Просунутий Data Binding — ElementName, RelativeSource, MultiBinding","/csharp/desktop-ui/data-binding-advanced","01.csharp/12.desktop-ui/18.data-binding-advanced",{"title":1473,"path":1474,"stem":1475},"Value Converters — Перетворення типів даних у Data Binding","/csharp/desktop-ui/value-converters","01.csharp/12.desktop-ui/19.value-converters",{"title":1477,"path":1478,"stem":1479},"Data Templates — Візуалізація об'єктів у WPF","/csharp/desktop-ui/data-templates","01.csharp/12.desktop-ui/20.data-templates",{"title":1481,"path":1482,"stem":1483},"Collections Binding Part 1 — ObservableCollection та ItemsControl","/csharp/desktop-ui/collections-binding-part1","01.csharp/12.desktop-ui/21.collections-binding-part1",{"title":1485,"path":1486,"stem":1487},"Collections Binding Part 2 — ICollectionView, Filtering, Sorting та Virtualization","/csharp/desktop-ui/collections-binding-part2","01.csharp/12.desktop-ui/21.collections-binding-part2",{"title":1489,"path":1490,"stem":1491},"MVVM Pattern — Від Spaghetti Code до архітектури","/csharp/desktop-ui/mvvm-pattern","01.csharp/12.desktop-ui/22.mvvm-pattern",{"title":1493,"path":1494,"stem":1495},"ViewModel Implementation — Від BaseViewModel до валідації","/csharp/desktop-ui/viewmodel-implementation","01.csharp/12.desktop-ui/23.viewmodel-implementation",{"title":1497,"path":1498,"stem":1499},"Commands — Від event handlers до декларативних команд","/csharp/desktop-ui/commands","01.csharp/12.desktop-ui/24.commands",{"title":1501,"path":1502,"stem":1503},"MVVM Toolkit — MVVM без boilerplate через Source Generators","/csharp/desktop-ui/mvvm-toolkit","01.csharp/12.desktop-ui/25.mvvm-toolkit",{"title":1505,"path":1506,"stem":1507},"Messenger Pattern — Комунікація між ViewModel без прямих посилань","/csharp/desktop-ui/messenger-pattern","01.csharp/12.desktop-ui/26.messenger-pattern",{"title":1509,"path":1510,"stem":1511},"Стилі WPF — CSS для десктопу","/csharp/desktop-ui/styles-basics","01.csharp/12.desktop-ui/27.styles-basics",{"title":1513,"path":1514,"stem":1515},"CSS-like стилі Avalonia","/csharp/desktop-ui/27a.avalonia-css-styling","01.csharp/12.desktop-ui/27a.avalonia-css-styling",{"title":1517,"path":1518,"stem":1519},"Control Templates — Частина 1. Концепція та TemplateBinding","/csharp/desktop-ui/control-templates-part1","01.csharp/12.desktop-ui/28.control-templates-part1",{"title":1521,"path":1522,"stem":1523},"Control Templates — Частина 2. Named Parts та ContentPresenter","/csharp/desktop-ui/control-templates-part2","01.csharp/12.desktop-ui/28.control-templates-part2",{"title":1525,"path":1526,"stem":1527},"Control Themes в Avalonia — нова ера стилізації","/csharp/desktop-ui/28a.avalonia-control-themes","01.csharp/12.desktop-ui/28a.avalonia-control-themes",{"title":1529,"path":1530,"stem":1531},"Triggers та Visual State Manager у WPF","/csharp/desktop-ui/triggers-visual-states","01.csharp/12.desktop-ui/29.triggers-visual-states",{"title":1533,"path":1534,"stem":1535},"Pseudo-classes в Avalonia — замість WPF Triggers","/csharp/desktop-ui/29a.avalonia-pseudo-classes","01.csharp/12.desktop-ui/29a.avalonia-pseudo-classes",{"title":1537,"path":1538,"stem":1539},"Теми та ресурсні словники у WPF","/csharp/desktop-ui/resources-themes","01.csharp/12.desktop-ui/30.resources-themes",{"title":1541,"path":1542,"stem":1543},"Avalonia Themes — Fluent Design та система тематизації","/csharp/desktop-ui/30a.avalonia-themes-fluent","01.csharp/12.desktop-ui/30a.avalonia-themes-fluent",{"title":1545,"path":1546,"stem":1547},"Контроли колекцій — глибоке занурення","/csharp/desktop-ui/collection-controls","01.csharp/12.desktop-ui/31.collection-controls",{"title":1549,"path":1550,"stem":1551},"DataGrid — колонки та базове відображення","/csharp/desktop-ui/datagrid-part1","01.csharp/12.desktop-ui/32.datagrid-part1",{"title":1553,"path":1554,"stem":1555},"DataGrid — сортування, фільтрація, редагування","/csharp/desktop-ui/datagrid-part2","01.csharp/12.desktop-ui/32.datagrid-part2",{"title":1557,"path":1558,"stem":1559},"TreeView та GridView","/csharp/desktop-ui/treeview-listview","01.csharp/12.desktop-ui/33.treeview-listview",{"title":1561,"path":1562,"stem":1563},"Меню, Toolbar, ContextMenu, StatusBar","/csharp/desktop-ui/menus-toolbars","01.csharp/12.desktop-ui/34.menus-toolbars",{"title":1565,"path":1566,"stem":1567},"Навігація та керування вікнами. Частина 1: вікна та сторінки","/csharp/desktop-ui/navigation-windows-part1","01.csharp/12.desktop-ui/35.navigation-windows-part1",{"title":1569,"path":1570,"stem":1571},"Навігація та керування вікнами. Частина 2: MVVM-навігація","/csharp/desktop-ui/navigation-windows-part2","01.csharp/12.desktop-ui/35.navigation-windows-part2",{"title":1573,"path":1574,"stem":1575},"Avalonia — Навігація та діалоги","/csharp/desktop-ui/35a.avalonia-navigation-dialogs","01.csharp/12.desktop-ui/35a.avalonia-navigation-dialogs",{"title":1577,"path":1578,"stem":1579},"Діалоги та File Pickers у WPF","/csharp/desktop-ui/dialogs-file-pickers","01.csharp/12.desktop-ui/36.dialogs-file-pickers",{"title":1581,"path":1582,"stem":1583},"UserControl: компонентний підхід у WPF","/csharp/desktop-ui/user-controls","01.csharp/12.desktop-ui/37.user-controls",{"title":1585,"path":1586,"stem":1587},"Custom Controls: Lookless Controls у WPF","/csharp/desktop-ui/custom-controls","01.csharp/12.desktop-ui/38.custom-controls",{"title":1589,"path":1590,"stem":1591},"Avalonia TemplatedControl — Lookless Controls","/csharp/desktop-ui/38a.avalonia-templated-controls","01.csharp/12.desktop-ui/38a.avalonia-templated-controls",{"title":1593,"path":1594,"stem":1595},"Анімації у WPF: Storyboard та Easing Functions","/csharp/desktop-ui/animations-transitions","01.csharp/12.desktop-ui/39.animations-transitions",{"title":1597,"path":1598,"stem":1599},"Анімації в Avalonia","/csharp/desktop-ui/39a.avalonia-animations","01.csharp/12.desktop-ui/39a.avalonia-animations",{"title":1601,"path":1602,"stem":1603},"2D Графіка та Мультимедіа у WPF","/csharp/desktop-ui/media-graphics","01.csharp/12.desktop-ui/40.media-graphics",{"title":1605,"path":1606,"stem":1607},"Dependency Injection у WPF та Avalonia","/csharp/desktop-ui/di-integration","01.csharp/12.desktop-ui/41.di-integration",{"title":1609,"path":1610,"stem":1611},"SQLite та EF Core у десктопних додатках","/csharp/desktop-ui/data-persistence-part1","01.csharp/12.desktop-ui/42.data-persistence-part1",{"title":1613,"path":1614,"stem":1615},"Repository Pattern та Unit of Work","/csharp/desktop-ui/data-persistence-part2","01.csharp/12.desktop-ui/43.data-persistence-part2",{"title":1617,"path":1618,"stem":1619},"Тестування ViewModels","/csharp/desktop-ui/viewmodel-testing","01.csharp/12.desktop-ui/44.viewmodel-testing",{"title":1621,"path":1622,"stem":1623},"Avalonia Headless Testing — тестування UI без вікон","/csharp/desktop-ui/44a.avalonia-headless-testing","01.csharp/12.desktop-ui/44a.avalonia-headless-testing",{"title":1625,"path":1626,"stem":1627},"Кросплатформна розробка з Avalonia","/csharp/desktop-ui/avalonia-cross-platform","01.csharp/12.desktop-ui/45.avalonia-cross-platform",{"title":1629,"path":1630,"stem":1631},"Пакування та розгортання Avalonia додатків","/csharp/desktop-ui/avalonia-packaging-deployment","01.csharp/12.desktop-ui/46.avalonia-packaging-deployment",{"title":1633,"path":1634,"stem":1635},"Розгортання WPF застосунків","/csharp/desktop-ui/wpf-packaging-deployment","01.csharp/12.desktop-ui/47.wpf-packaging-deployment",{"title":1637,"path":1638,"stem":1639},"C# & .NET: The Ultimate Roadmap","/csharp/roadmap","01.csharp/roadmap",{"title":1641,"icon":1642,"path":1643,"stem":1644,"children":1645,"page":59},"C++","i-devicon-cplusplus","/cpp","02.cpp",[1646,1650,1654,1658,1662,1666,1670,1674,1678,1681,1685,1689,1693,1697,1701,1705,1709,1713,1717,1721,1725,1729,1733,1737,1741,1745,1749,1753,1757,1761],{"title":1647,"path":1648,"stem":1649},"Вступ у програмування та алгоритми","/cpp/intro-algorithms","02.cpp/01.intro-algorithms",{"title":1651,"path":1652,"stem":1653},"Code Style: угоди про оформлення коду","/cpp/code-style","02.cpp/02.code-style",{"title":1655,"path":1656,"stem":1657},"Середовище розробки та перший 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типу void","/cpp/void-pointers","02.cpp/20.void-pointers",{"title":1726,"path":1727,"stem":1728},"Вказівники на вказівники","/cpp/pointers-to-pointers","02.cpp/21.pointers-to-pointers",{"title":1730,"path":1731,"stem":1732},"Оператор доступу до членів через вказівник (->)","/cpp/member-access-operator","02.cpp/22.member-access-operator",{"title":1734,"path":1735,"stem":1736},"Цикл for-each (Range-based for)","/cpp/foreach-loop","02.cpp/23.foreach-loop",{"title":1738,"path":1739,"stem":1740},"Вказівники на функції","/cpp/function-pointers","02.cpp/24.function-pointers",{"title":1742,"path":1743,"stem":1744},"Лямбда-вирази","/cpp/lambdas","02.cpp/25.lambdas",{"title":1746,"path":1747,"stem":1748},"Лямбда-захоплення","/cpp/lambda-captures","02.cpp/26.lambda-captures",{"title":1750,"path":1751,"stem":1752},"Еліпсис","/cpp/ellipsis","02.cpp/27.ellipsis",{"title":1754,"path":1755,"stem":1756},"Аргументи командного рядка","/cpp/command-line-arguments","02.cpp/28.command-line-arguments",{"title":1758,"path":1759,"stem":1760},"Перерахування (enum)","/cpp/enum","02.cpp/29.enum",{"title":1762,"path":1763,"stem":1764},"План навчання: Курс C++ — Продовження (Статті 29–60+)","/cpp/curriculum-plan","02.cpp/curriculum-plan",{"title":1766,"icon":1767,"path":1768,"stem":1769,"children":1770,"page":59},"JavaScript","i-devicon-javascript","/javascript","03.javascript",[1771,1797,1851,1873,2177,2215],{"title":1772,"icon":1773,"path":1774,"stem":1775,"children":1776,"page":59},"Events","i-lucide-mouse-pointer-click","/javascript/events","03.javascript/01.events",[1777,1781,1785,1789,1793],{"title":1778,"path":1779,"stem":1780},"Вступ до подій браузера","/javascript/events/intro","03.javascript/01.events/01.intro",{"title":1782,"path":1783,"stem":1784},"Бульбашковий механізм (Bubbling) та занурення (Capturing)","/javascript/events/bubbling-capturing","03.javascript/01.events/02.bubbling-capturing",{"title":1786,"path":1787,"stem":1788},"Делегування подій (Event Delegation)","/javascript/events/delegate-events","03.javascript/01.events/03.delegate-events",{"title":1790,"path":1791,"stem":1792},"Типові дії браузера та preventDefault()","/javascript/events/prevent-default","03.javascript/01.events/04.prevent-default",{"title":1794,"path":1795,"stem":1796},"Запуск користувацьких подій (Custom Events)","/javascript/events/custom-events","03.javascript/01.events/05.custom-events",{"title":1798,"icon":1799,"path":1800,"stem":1801,"children":1802,"page":59},"Network","i-lucide-globe","/javascript/network","03.javascript/02.network",[1803,1807,1811,1815,1819,1823,1827,1831,1835,1839,1843,1847],{"title":1804,"path":1805,"stem":1806},"Fetch API - Сучасний підхід до HTTP-запитів","/javascript/network/01-fetch-api","03.javascript/02.network/01-fetch-api",{"title":1808,"path":1809,"stem":1810},"FormData - Робота з формами та файлами","/javascript/network/02-formdata","03.javascript/02.network/02-formdata",{"title":1812,"path":1813,"stem":1814},"Відстеження прогресу завантаження","/javascript/network/03-download-progress","03.javascript/02.network/03-download-progress",{"title":1816,"path":1817,"stem":1818},"Переривання fetch-запитів","/javascript/network/04-abort-requests","03.javascript/02.network/04-abort-requests",{"title":1820,"path":1821,"stem":1822},"CORS - Запити між різними джерелами","/javascript/network/05-cors","03.javascript/02.network/05-cors",{"title":1824,"path":1825,"stem":1826},"Fetch API - Повний довідник опцій","/javascript/network/06-fetch-options","03.javascript/02.network/06-fetch-options",{"title":1828,"path":1829,"stem":1830},"URL Objects - Робота з посиланнями","/javascript/network/07-url-objects","03.javascript/02.network/07-url-objects",{"title":1832,"path":1833,"stem":1834},"XMLHttpRequest - AJAX та низькорівневі запити","/javascript/network/08-xmlhttprequest","03.javascript/02.network/08-xmlhttprequest",{"title":1836,"path":1837,"stem":1838},"Відновлюване завантаження файлів","/javascript/network/09-resumable-upload","03.javascript/02.network/09-resumable-upload",{"title":1840,"path":1841,"stem":1842},"Cookies, document.cookie та світ після \"Cookiepocalypse\"","/javascript/network/10-cookies","03.javascript/02.network/10-cookies",{"title":1844,"path":1845,"stem":1846},"js-cookie: Керування Cookies без Болю","/javascript/network/11-js-cookie","03.javascript/02.network/11-js-cookie",{"title":1848,"path":1849,"stem":1850},"Axios: Потужний HTTP-клієнт для JavaScript","/javascript/network/12-axios","03.javascript/02.network/12-axios",{"title":1852,"icon":1853,"path":1854,"stem":1855,"children":1856,"page":59},"Bom","i-lucide-monitor","/javascript/bom","03.javascript/03.bom",[1857,1861,1865,1869],{"title":1858,"path":1859,"stem":1860},"LocalStorage, SessionStorage та patterns збереження даних","/javascript/bom/01-localstorage","03.javascript/03.bom/01-localstorage",{"title":1862,"path":1863,"stem":1864},"Location Object - Керування адресою сторінки","/javascript/bom/02-location-object","03.javascript/03.bom/02-location-object",{"title":1866,"path":1867,"stem":1868},"History API - Керування історією браузера","/javascript/bom/03-history-api","03.javascript/03.bom/03-history-api",{"title":1870,"path":1871,"stem":1872},"Navigator Object - Ідентифікація та Можливості Пристрою","/javascript/bom/04-navigator-object","03.javascript/03.bom/04-navigator-object",{"title":1874,"icon":1875,"path":1876,"stem":1877,"children":1878},"React","i-devicon-react","/javascript/react","03.javascript/04.react/index",[1879,1880,1884,1888,1892,1896,1959,1994,2146],{"title":1874,"path":1876,"stem":1877},{"title":1881,"path":1882,"stem":1883},"Робота з Формами в React","/javascript/react/react-forms","03.javascript/04.react/01.react-forms",{"title":1885,"path":1886,"stem":1887},"React Hook Form: Професійна Робота з Формами","/javascript/react/react-hook-form","03.javascript/04.react/02.react-hook-form",{"title":1889,"path":1890,"stem":1891},"React Hook Form: Глибоке Розуміння Архітектури та Оптимізації","/javascript/react/react-hook-form-new","03.javascript/04.react/02.react-hook-form-new",{"title":1893,"path":1894,"stem":1895},"Axios та React: Професійна Архітектура Запитів","/javascript/react/data-fetching-axios","03.javascript/04.react/03.data-fetching-axios",{"title":1897,"icon":132,"path":1898,"stem":1899,"children":1900},"Tanstack Query","/javascript/react/tanstack-query","03.javascript/04.react/04.tanstack-query/index",[1901,1903,1907,1911,1915,1919,1923,1927,1931,1935,1939,1943,1947,1951,1955],{"title":1902,"path":1898,"stem":1899},"TanStack Query: Майстерність Керування Станом Сервера",{"title":1904,"path":1905,"stem":1906},"Парадигма Server State: Чому useEffect недостатньо","/javascript/react/tanstack-query/server-state-paradigm","03.javascript/04.react/04.tanstack-query/01.server-state-paradigm",{"title":1908,"path":1909,"stem":1910},"Встановлення та Налаштування: Фундамент","/javascript/react/tanstack-query/installation-and-devtools","03.javascript/04.react/04.tanstack-query/02.installation-and-devtools",{"title":1912,"path":1913,"stem":1914},"Основи Запитів та Магія Ключів","/javascript/react/tanstack-query/query-basics-and-keys","03.javascript/04.react/04.tanstack-query/03.query-basics-and-keys",{"title":1916,"path":1917,"stem":1918},"Синхронізація Даних: Життєвий Цикл Запиту","/javascript/react/tanstack-query/data-synchronization","03.javascript/04.react/04.tanstack-query/04.data-synchronization",{"title":1920,"path":1921,"stem":1922},"Мутації та Інвалідація: Зміна Даних","/javascript/react/tanstack-query/mutations-and-invalidation","03.javascript/04.react/04.tanstack-query/05.mutations-and-invalidation",{"title":1924,"path":1925,"stem":1926},"Оптимістичні Оновлення: Швидше за Світло","/javascript/react/tanstack-query/optimistic-updates","03.javascript/04.react/04.tanstack-query/06.optimistic-updates",{"title":1928,"path":1929,"stem":1930},"Пагінація та Infinite Scroll","/javascript/react/tanstack-query/pagination-and-load-more","03.javascript/04.react/04.tanstack-query/07.pagination-and-load-more",{"title":1932,"path":1933,"stem":1934},"Просунуті Патерни та Оптимізація","/javascript/react/tanstack-query/advanced-patterns","03.javascript/04.react/04.tanstack-query/08.advanced-patterns",{"title":1936,"path":1937,"stem":1938},"Архітектура та Best Practices","/javascript/react/tanstack-query/architecture-and-best-practices","03.javascript/04.react/04.tanstack-query/09.architecture-and-best-practices",{"title":1940,"path":1941,"stem":1942},"Server-Side Rendering (SSR) та Гідратація","/javascript/react/tanstack-query/server-side-rendering","03.javascript/04.react/04.tanstack-query/10.server-side-rendering",{"title":1944,"path":1945,"stem":1946},"Стратегії Тестування","/javascript/react/tanstack-query/testing-strategies","03.javascript/04.react/04.tanstack-query/11.testing-strategies",{"title":1948,"path":1949,"stem":1950},"Аутентифікація та Обробка Помилок","/javascript/react/tanstack-query/authentication-and-errors","03.javascript/04.react/04.tanstack-query/12.authentication-and-errors",{"title":1952,"path":1953,"stem":1954},"React Suspense та Майбутнє","/javascript/react/tanstack-query/react-suspense","03.javascript/04.react/04.tanstack-query/13.react-suspense",{"title":1956,"path":1957,"stem":1958},"Глибоке Занурення в Продуктивність","/javascript/react/tanstack-query/performance-deep-dive","03.javascript/04.react/04.tanstack-query/14.performance-deep-dive",{"title":1960,"icon":1875,"path":1961,"stem":1962,"children":1963},"React Router","/javascript/react/react-router","03.javascript/04.react/05.react-router/index",[1964,1966,1970,1974,1978,1982,1986,1990],{"title":1965,"path":1961,"stem":1962},"React Router: Навігаційна система сучасного вебу",{"title":1967,"path":1968,"stem":1969},"Налаштування та Базовий Роутинг","/javascript/react/react-router/setup-and-basic-routing","03.javascript/04.react/05.react-router/01.setup-and-basic-routing",{"title":1971,"path":1972,"stem":1973},"Динамічна Навігація","/javascript/react/react-router/navigation-and-links","03.javascript/04.react/05.react-router/02.navigation-and-links",{"title":1975,"path":1976,"stem":1977},"Вкладені Маршрути та Макети","/javascript/react/react-router/nested-routes-and-layouts","03.javascript/04.react/05.react-router/03.nested-routes-and-layouts",{"title":1979,"path":1980,"stem":1981},"Динамічні Маршрути та Параметри","/javascript/react/react-router/dynamic-routing","03.javascript/04.react/05.react-router/04.dynamic-routing",{"title":1983,"path":1984,"stem":1985},"Data APIs: Loaders та Actions","/javascript/react/react-router/data-loading","03.javascript/04.react/05.react-router/05.data-loading",{"title":1987,"path":1988,"stem":1989},"Просунуті Патерни","/javascript/react/react-router/advanced-patterns","03.javascript/04.react/05.react-router/06.advanced-patterns",{"title":1991,"path":1992,"stem":1993},"Legacy Routing: Компонентний підхід","/javascript/react/react-router/legacy-routing","03.javascript/04.react/05.react-router/07.legacy-routing",{"title":1995,"icon":132,"path":1996,"stem":1997,"children":1998},"Redux","/javascript/react/redux","03.javascript/04.react/06.redux/index",[1999,2001,2017,2046,2055,2076,2092,2121],{"title":2000,"path":1996,"stem":1997},"Redux: Еволюція управління станом",{"title":14,"icon":15,"path":2002,"stem":2003,"children":2004,"page":59},"/javascript/react/redux/fundamentals","03.javascript/04.react/06.redux/01.fundamentals",[2005,2009,2013],{"title":2006,"path":2007,"stem":2008},"Вступ до State Management","/javascript/react/redux/fundamentals/intro-state-management","03.javascript/04.react/06.redux/01.fundamentals/01.intro-state-management",{"title":2010,"path":2011,"stem":2012},"Філософія Redux та Три Принципи","/javascript/react/redux/fundamentals/redux-philosophy","03.javascript/04.react/06.redux/01.fundamentals/02.redux-philosophy",{"title":2014,"path":2015,"stem":2016},"Чисті функції та Іммутабельність","/javascript/react/redux/fundamentals/pure-functions-immutability","03.javascript/04.react/06.redux/01.fundamentals/03.pure-functions-immutability",{"title":2018,"icon":132,"path":2019,"stem":2020,"children":2021,"page":59},"Classic Redux","/javascript/react/redux/classic-redux","03.javascript/04.react/06.redux/02.classic-redux",[2022,2026,2030,2034,2038,2042],{"title":2023,"path":2024,"stem":2025},"Створення Store (Classic Redux)","/javascript/react/redux/classic-redux/store-setup","03.javascript/04.react/06.redux/02.classic-redux/01.store-setup",{"title":2027,"path":2028,"stem":2029},"Actions, Constants та Action Creators","/javascript/react/redux/classic-redux/actions-constants","03.javascript/04.react/06.redux/02.classic-redux/02.actions-constants",{"title":2031,"path":2032,"stem":2033},"Логіка Reducers","/javascript/react/redux/classic-redux/reducers","03.javascript/04.react/06.redux/02.classic-redux/03.reducers",{"title":2035,"path":2036,"stem":2037},"Комбінування Reducers (Root Reducer)","/javascript/react/redux/classic-redux/data-flow","03.javascript/04.react/06.redux/02.classic-redux/04.data-flow",{"title":2039,"path":2040,"stem":2041},"Підключення до React (React-Redux)","/javascript/react/redux/classic-redux/react-redux-connection","03.javascript/04.react/06.redux/02.classic-redux/05.react-redux-connection",{"title":2043,"path":2044,"stem":2045},"Middleware та Асинхронність (Redux Thunk)","/javascript/react/redux/classic-redux/middleware-thunk","03.javascript/04.react/06.redux/02.classic-redux/06.middleware-thunk",{"title":2047,"icon":132,"path":2048,"stem":2049,"children":2050,"page":59},"Transition To Rtk","/javascript/react/redux/transition-to-rtk","03.javascript/04.react/06.redux/03.transition-to-rtk",[2051],{"title":2052,"path":2053,"stem":2054},"Проблеми класичного Redux","/javascript/react/redux/transition-to-rtk/problems-with-classic","03.javascript/04.react/06.redux/03.transition-to-rtk/01.problems-with-classic",{"title":2056,"icon":132,"path":2057,"stem":2058,"children":2059,"page":59},"Redux Toolkit","/javascript/react/redux/redux-toolkit","03.javascript/04.react/06.redux/04.redux-toolkit",[2060,2064,2068,2072],{"title":2061,"path":2062,"stem":2063},"Налаштування Store з 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дружити","/java/pr2/impedance-mismatch","04.java/pr2/09.impedance-mismatch",{"title":2285,"path":2286,"stem":2287},"JDBC: Перший контакт із базою даних","/java/pr2/jdbc-fundamentals","04.java/pr2/10.jdbc-fundamentals",{"title":2289,"path":2290,"stem":2291},"Якість коду: Spotless, SpotBugs та SonarQube","/java/pr2/10a.code-quality","04.java/pr2/10a.code-quality",{"title":2293,"path":2294,"stem":2295},"Connection Pool: Патерн Object Pool для JDBC-з'єднань","/java/pr2/connection-pool","04.java/pr2/11.connection-pool",{"title":2297,"path":2298,"stem":2299},"Row Data Gateway: Об'єкт як обгортка рядка таблиці","/java/pr2/row-data-gateway","04.java/pr2/12.row-data-gateway",{"title":2301,"path":2302,"stem":2303},"Table Data Gateway: Фасад таблиці як архітектурний відступ","/java/pr2/table-data-gateway","04.java/pr2/13.table-data-gateway",{"title":2305,"path":2306,"stem":2307},"Repository + Data Mapper: Правильна шарова архітектура з JDBC","/java/pr2/repository-data-mapper","04.java/pr2/14.repository-data-mapper",{"title":2309,"path":2310,"stem":2311},"Identity Map: Кешування сутностей у рамках сесії","/java/pr2/identity-map","04.java/pr2/15.identity-map",{"title":2313,"path":2314,"stem":2315},"Unit of Work: Відстеження змін і координація JDBC-транзакцій","/java/pr2/unit-of-work","04.java/pr2/16.unit-of-work",{"title":2317,"path":2318,"stem":2319},"Strategy: Замінювані SQL-стратегії для підтримки різних СУБД","/java/pr2/strategy-sql","04.java/pr2/17.strategy-sql",{"title":2321,"path":2322,"stem":2323},"Proxy: Lazy Loading для One-To-Many колекцій","/java/pr2/proxy-lazy-loading","04.java/pr2/18.proxy-lazy-loading",{"title":2325,"path":2326,"stem":2327},"Generic Repository через Java Reflection: анотації та динамічний SQL","/java/pr2/generic-repository-reflection","04.java/pr2/19.generic-repository-reflection",{"title":2329,"path":2330,"stem":2331},"Specification Pattern: Композиція бізнес-правил для складних 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БД","/databases/intro/logical-schema","06.databases/01.intro/04.logical-schema",{"title":2381,"path":2382,"stem":2383},"Класифікація таблиць","/databases/intro/table-classification","06.databases/01.intro/05.table-classification",{"title":2385,"path":2386,"stem":2387},"PlantUML для баз даних","/databases/intro/plantuml-diagrams","06.databases/01.intro/06.plantuml-diagrams",{"title":2389,"icon":2354,"path":2390,"stem":2391,"children":2392,"page":59},"MS SQL Server Start","/databases/ms-sql-server-start","06.databases/02.ms-sql-server-start",[2393,2397,2403,2407],{"title":2394,"path":2395,"stem":2396},"Типи даних у MS SQL Server","/databases/ms-sql-server-start/data-types","06.databases/02.ms-sql-server-start/01.data-types",{"title":2398,"path":2399,"stem":2400,"children":2401},"Індекси у MS SQL 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TABLE)","/databases/sql/ddl-create-table","06.databases/03.sql/01.ddl-create-table",{"title":2425,"path":2426,"stem":2427},"DDL - Зміна та видалення таблиць (ALTER, DROP)","/databases/sql/ddl-alter-drop-table","06.databases/03.sql/02.ddl-alter-drop-table",{"title":2429,"path":2430,"stem":2431},"SELECT запити - Основи","/databases/sql/select-queries-fundamentals","06.databases/03.sql/03.select-queries-fundamentals",{"title":2433,"path":2434,"stem":2435},"SELECT запити - Розширені можливості","/databases/sql/select-queries-advanced","06.databases/03.sql/04.select-queries-advanced",{"title":2437,"path":2438,"stem":2439},"INSERT запити - Додавання даних","/databases/sql/insert-queries","06.databases/03.sql/05.insert-queries",{"title":2441,"path":2442,"stem":2443},"UPDATE та DELETE запити","/databases/sql/update-delete-queries","06.databases/03.sql/06.update-delete-queries",{"title":2445,"path":2446,"stem":2447},"Транзакції в SQL","/databases/sql/transactions","06.databases/03.sql/07.transactions",{"title":2449,"icon":2354,"path":2450,"stem":2451,"children":2452,"page":59},"Multi Table Databases","/databases/multi-table-databases","06.databases/04.multi-table-databases",[2453,2457,2461,2465,2469,2473],{"title":2454,"path":2455,"stem":2456},"Зв'язки та нормалізація БД","/databases/multi-table-databases/relationships-and-normalization","06.databases/04.multi-table-databases/00.relationships-and-normalization",{"title":2458,"path":2459,"stem":2460},"INNER JOIN - З'єднання таблиць","/databases/multi-table-databases/inner-join","06.databases/04.multi-table-databases/01.inner-join",{"title":2462,"path":2463,"stem":2464},"OUTER JOINs - LEFT, RIGHT, FULL","/databases/multi-table-databases/outer-joins","06.databases/04.multi-table-databases/02.outer-joins",{"title":2466,"path":2467,"stem":2468},"CROSS та SELF JOINs","/databases/multi-table-databases/cross-self-joins","06.databases/04.multi-table-databases/03.cross-self-joins",{"title":2470,"path":2471,"stem":2472},"Підзапити (Subqueries)","/databases/multi-table-databases/subqueries","06.databases/04.multi-table-databases/04.subqueries",{"title":2474,"path":2475,"stem":2476},"Агрегації з JOIN","/databases/multi-table-databases/aggregations-with-joins","06.databases/04.multi-table-databases/05.aggregations-with-joins",{"title":2478,"icon":2479,"path":2480,"stem":2481,"children":2482,"page":59},"Aggregate Functions","i-lucide-calculator","/databases/aggregate-functions","06.databases/05.aggregate-functions",[2483,2487,2491],{"title":2484,"path":2485,"stem":2486},"Функції агрегування в MS SQL Server","/databases/aggregate-functions/introduction-aggregate-functions","06.databases/05.aggregate-functions/01.introduction-aggregate-functions",{"title":2488,"path":2489,"stem":2490},"Групування даних в MS SQL Server","/databases/aggregate-functions/grouping-data","06.databases/05.aggregate-functions/02.grouping-data",{"title":2492,"path":2493,"stem":2494},"Підзапити з агрегатними функціями","/databases/aggregate-functions/subqueries-aggregates","06.databases/05.aggregate-functions/03.subqueries-aggregates",{"title":2496,"icon":2497,"path":2498,"stem":2499,"children":2500,"page":59},"Тригери та зберігаємі процедури","i-lucide-database-zap","/databases/triggers-stored-procedures","06.databases/07.triggers-stored-procedures",[2501,2505,2509,2513,2517,2521,2525],{"title":2502,"path":2503,"stem":2504},"DML-тригери","/databases/triggers-stored-procedures/dml-triggers","06.databases/07.triggers-stored-procedures/01.dml-triggers",{"title":2506,"path":2507,"stem":2508},"DDL-тригери","/databases/triggers-stored-procedures/ddl-triggers","06.databases/07.triggers-stored-procedures/02.ddl-triggers",{"title":2510,"path":2511,"stem":2512},"Transact-SQL 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Docker","/tools/docker/networking-basics","07.tools/01.docker/14.networking-basics",{"title":2630,"path":2631,"stem":2632},"Змінні оточення та конфігурація","/tools/docker/environment-and-configuration","07.tools/01.docker/15.environment-and-configuration",{"title":2634,"path":2635,"stem":2636},"Docker Compose — оркестрація контейнерів","/tools/docker/docker-compose-basics","07.tools/01.docker/16.docker-compose-basics",{"title":2638,"path":2639,"stem":2640},"Docker Compose — Multi-Service застосунки","/tools/docker/compose-multi-service","07.tools/01.docker/17.compose-multi-service",{"title":2642,"icon":2643,"path":2644,"stem":2645,"children":2646,"page":59},"Software Engineering","i-lucide-code-2","/software-engineering","09.software-engineering",[2647,2651,2655,2659,2663,2667,2671,2675,2679,2683,2687],{"title":2648,"path":2649,"stem":2650},"1. 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Частина 2","/html-css/css-layout-grid-advanced","12.html-css/16.css-layout-grid-advanced",{"title":2861,"path":2862,"stem":2863},"Позиціонування в CSS. Z-index. Stacking Context","/html-css/css-positioning","12.html-css/17.css-positioning",{"title":2865,"path":2866,"stem":2867},"CSS Анімації та Переходи","/html-css/css-animations-transitions","12.html-css/18.css-animations-transitions",{"title":2869,"path":2870,"stem":2871},"Адаптивний дизайн. Media Queries. Частина 1","/html-css/css-responsive-media-queries","12.html-css/19.css-responsive-media-queries",{"title":2873,"path":2874,"stem":2875},"Адаптивний дизайн. Частина 2: clamp(), Container Queries, @layer","/html-css/css-responsive-advanced","12.html-css/20.css-responsive-advanced",{"title":2877,"path":2878,"stem":2879},"CSS Custom Properties. Методології. Сучасний CSS","/html-css/css-variables-methodologies","12.html-css/21.css-variables-methodologies",{"title":2881,"path":2882,"stem":2883},"Сучасний CSS 2023–2025: Нові можливості","/html-css/css-modern-features","12.html-css/22.css-modern-features",{"title":2885,"path":2886,"stem":2887},"CSS Nesting, @layer, @scope та @property: нативний препроцесор","/html-css/22a.css-nesting-modern-syntax","12.html-css/22a.css-nesting-modern-syntax",{"title":2889,"path":2890,"stem":2891},"CSS для форм та інтерактивних станів","/html-css/css-forms-interactive-states","12.html-css/23.css-forms-interactive-states",{"title":2893,"path":2894,"stem":2895},"Доступність у CSS (CSS Accessibility)","/html-css/css-accessibility","12.html-css/24.css-accessibility",{"title":2897,"path":2898,"stem":2899},"CSS-функції та сучасні sizing primitives","/html-css/css-functions-sizing","12.html-css/25.css-functions-sizing",{"title":2901,"path":2902,"stem":2903},"Rendering Pipeline і CSS Performance","/html-css/css-rendering-performance","12.html-css/26.css-rendering-performance",{"title":2905,"path":2906,"stem":2907},"CSS Best Practices: типові ситуації та правильні рішення","/html-css/css-best-practices","12.html-css/27.css-best-practices",{"title":2909,"path":2910,"stem":2911,"children":2912,"page":59},"Tailwind","/tailwind","21.tailwind",[2913,2917,2921,2925,2929,2933,2937,2941],{"title":2914,"path":2915,"stem":2916},"Що таке Tailwind CSS і навіщо він потрібен","/tailwind/tailwind-intro-philosophy","21.tailwind/01.tailwind-intro-philosophy",{"title":2918,"path":2919,"stem":2920},"Встановлення та налаштування Tailwind CSS v4","/tailwind/tailwind-installation-setup","21.tailwind/02.tailwind-installation-setup",{"title":2922,"path":2923,"stem":2924},"Utility-класи: основи та система Tailwind","/tailwind/tailwind-utility-classes-core","21.tailwind/03.tailwind-utility-classes-core",{"title":2926,"path":2927,"stem":2928},"Layout: Flexbox та Grid через Tailwind","/tailwind/tailwind-flexbox-grid","21.tailwind/04.tailwind-flexbox-grid",{"title":2930,"path":2931,"stem":2932},"Кастомізація теми через @theme у Tailwind v4","/tailwind/tailwind-theme-customization","21.tailwind/05.tailwind-theme-customization",{"title":2934,"path":2935,"stem":2936},"Варіанти: hover, focus, responsive, dark mode та нові v4","/tailwind/tailwind-variants-states","21.tailwind/06.tailwind-variants-states",{"title":2938,"path":2939,"stem":2940},"Типографіка та система кольорів у Tailwind v4","/tailwind/tailwind-typography-colors","21.tailwind/07.tailwind-typography-colors",{"title":2942,"path":2943,"stem":2944},"Компоненти та повторюваність: @apply, @utility та патерни","/tailwind/tailwind-components-patterns","21.tailwind/08.tailwind-components-patterns",{"title":2946,"path":2947,"stem":2948},"Showcase Компонентів kostyl.dev","/test-new-components","98.test-new-components",{"id":2950,"title":2293,"body":2951,"description":9234,"extension":9235,"links":9236,"meta":9237,"navigation":3134,"path":2294,"seo":9238,"stem":2295,"__hash__":9239},"docs/04.java/pr2/11.connection-pool.md",{"type":2952,"value":2953,"toc":9214},"minimark",[2954,2958,2963,2976,2983,3045,3059,3062,3072,3075,3079,3086,3094,3200,3210,3252,3255,3259,3266,3270,3273,3638,3642,5532,5537,5596,5598,5602,5627,5634,8255,8275,8277,8281,8289,8618,8627,8746,8748,8752,9016,9022,9028,9030,9034,9093,9095,9099,9102,9126,9132,9134,9138,9176,9194,9210],[2955,2956,2293],"h1",{"id":2957},"connection-pool-патерн-object-pool-для-jdbc-зєднань",[2959,2960,2962],"h2",{"id":2961},"вступ-прихована-вартість-кожного-зєднання","Вступ: Прихована вартість кожного з'єднання",[2964,2965,2966,2967,2971,2972,2975],"p",{},"У попередній статті наш ",[2968,2969,2970],"code",{},"ConnectionManager"," при кожному виклику ",[2968,2973,2974],{},"getConnection()"," створював нове фізичне з'єднання з базою даних. Це рішення є коректним для навчального прикладу — але катастрофічним для будь-якої реальної системи.",[2964,2977,2978,2979,2982],{},"Розглянемо, що відбувається «під капотом» при виклику ",[2968,2980,2981],{},"DriverManager.getConnection(url, user, password)",":",[2984,2985,2986,2991,2999,3003,3010,3014,3020,3024,3035,3039],"steps",{},[2987,2988,2990],"h3",{"id":2989},"крок-1-dns-розпізнавання-та-tcp-зєднання","Крок 1: DNS-розпізнавання та TCP-з'єднання",[2964,2992,2993,2994,2998],{},"JVM ініціює TCP handshake до сервера бази даних. Навіть у локальній мережі це займає ",[2995,2996,2997],"strong",{},"1–5 мс",". Через інтернет — десятки мілісекунд.",[2987,3000,3002],{"id":3001},"крок-2-ssltls-handshake","Крок 2: SSL/TLS handshake",[2964,3004,3005,3006,3009],{},"У production-середовищах з'єднання шифрується. SSL-рукостискання включає обмін сертифікатами, узгодження алгоритму шифрування та генерацію сесійних ключів — ще ",[2995,3007,3008],{},"5–20 мс",".",[2987,3011,3013],{"id":3012},"крок-3-аутентифікація","Крок 3: Аутентифікація",[2964,3015,3016,3017,3009],{},"БД перевіряє облікові дані користувача, звертаючись до системних таблиць. При складних системах прав доступу — ще ",[2995,3018,3019],{},"2–10 мс",[2987,3021,3023],{"id":3022},"крок-4-ініціалізація-сесії","Крок 4: Ініціалізація сесії",[2964,3025,3026,3027,3030,3031,3034],{},"Сервер виділяє пам'ять для сесії, встановлює параметри (",[2968,3028,3029],{},"timezone",", ",[2968,3032,3033],{},"encoding",", рівень ізоляції транзакцій), реєструє з'єднання у своєму реєстрі.",[2987,3036,3038],{"id":3037},"крок-5-підтвердження","Крок 5: Підтвердження",[2964,3040,3041,3042,3044],{},"Клієнт отримує підтвердження готовності — тільки тепер ",[2968,3043,2974],{}," повертає об'єкт.",[2964,3046,3047,3048,3051,3052,3055,3056,3009],{},"Сумарно: ",[2995,3049,3050],{},"50–200 мс"," лише на встановлення з'єднання — ще до того, як виконаний перший SQL-запит. Для порівняння: сам SQL-запит ",[2968,3053,3054],{},"SELECT * FROM authors"," на локальній H2 виконується за ",[2995,3057,3058],{},"0,1–1 мс",[2964,3060,3061],{},"Тепер уявімо веб-додаток, що обробляє 100 HTTP-запитів на секунду. Кожен запит відкриває і закриває JDBC-з'єднання:",[3063,3064,3069],"pre",{"className":3065,"code":3067,"language":3068},[3066],"language-text","100 запитів/сек × 100 мс на з'єднання = 10 секунд лише на підключення за кожну секунду роботи\n","text",[2968,3070,3067],{"__ignoreMap":3071},"",[2964,3073,3074],{},"Система витрачатиме у 10 разів більше часу на встановлення з'єднань, ніж на реальну роботу. Це неприйнятно.",[2959,3076,3078],{"id":3077},"патерн-object-pool","Патерн Object Pool",[2964,3080,3081,3082,3085],{},"Рішення відоме ще з 1990-х і описане у каталозі GoF як ",[2995,3083,3084],{},"Object Pool"," (пул об'єктів) — один із фундаментальних патернів управління ресурсами.",[3087,3088,3089],"blockquote",{},[2964,3090,3091,3093],{},[2995,3092,3084],{}," — патерн проектування, що підтримує набір ініціалізованих об'єктів, готових до використання, замість того щоб створювати і знищувати їх на вимогу. Клієнт бере об'єкт з пулу, використовує його і повертає назад — без знищення.",[3095,3096,3097],"mermaid",{},[3063,3098,3101],{"className":3099,"code":3100,"language":3095,"meta":3071,"style":3071},"language-mermaid shiki shiki-themes light-plus dark-plus dark-plus","sequenceDiagram\n    participant Client as DAO-метод\n    participant Pool as ConnectionPool\n    participant DB as База даних\n\n    Note over Pool,DB: Ініціалізація (один раз при старті)\n    Pool->>DB: TCP connect × N (min connections)\n    DB-->>Pool: N готових з'єднань\n\n    Client->>Pool: getConnection()\n    Pool-->>Client: Видати вільне з'єднання\n    Client->>DB: SELECT / INSERT / UPDATE\n    DB-->>Client: Результат\n    Client->>Pool: connection.close() → повернути в пул\n\n    Note over Client,Pool: З'єднання НЕ закривається — воно повертається!\n",[2968,3102,3103,3111,3117,3123,3129,3136,3142,3148,3154,3159,3165,3171,3177,3183,3189,3194],{"__ignoreMap":3071},[3104,3105,3108],"span",{"class":3106,"line":3107},"line",1,[3104,3109,3110],{},"sequenceDiagram\n",[3104,3112,3114],{"class":3106,"line":3113},2,[3104,3115,3116],{},"    participant Client as DAO-метод\n",[3104,3118,3120],{"class":3106,"line":3119},3,[3104,3121,3122],{},"    participant Pool as ConnectionPool\n",[3104,3124,3126],{"class":3106,"line":3125},4,[3104,3127,3128],{},"    participant DB as База даних\n",[3104,3130,3132],{"class":3106,"line":3131},5,[3104,3133,3135],{"emptyLinePlaceholder":3134},true,"\n",[3104,3137,3139],{"class":3106,"line":3138},6,[3104,3140,3141],{},"    Note over Pool,DB: Ініціалізація (один раз при старті)\n",[3104,3143,3145],{"class":3106,"line":3144},7,[3104,3146,3147],{},"    Pool->>DB: TCP connect × N (min connections)\n",[3104,3149,3151],{"class":3106,"line":3150},8,[3104,3152,3153],{},"    DB-->>Pool: N готових з'єднань\n",[3104,3155,3157],{"class":3106,"line":3156},9,[3104,3158,3135],{"emptyLinePlaceholder":3134},[3104,3160,3162],{"class":3106,"line":3161},10,[3104,3163,3164],{},"    Client->>Pool: getConnection()\n",[3104,3166,3168],{"class":3106,"line":3167},11,[3104,3169,3170],{},"    Pool-->>Client: Видати вільне з'єднання\n",[3104,3172,3174],{"class":3106,"line":3173},12,[3104,3175,3176],{},"    Client->>DB: SELECT / INSERT / UPDATE\n",[3104,3178,3180],{"class":3106,"line":3179},13,[3104,3181,3182],{},"    DB-->>Client: Результат\n",[3104,3184,3186],{"class":3106,"line":3185},14,[3104,3187,3188],{},"    Client->>Pool: connection.close() → повернути в пул\n",[3104,3190,3192],{"class":3106,"line":3191},15,[3104,3193,3135],{"emptyLinePlaceholder":3134},[3104,3195,3197],{"class":3106,"line":3196},16,[3104,3198,3199],{},"    Note over Client,Pool: З'єднання НЕ закривається — воно повертається!\n",[2964,3201,3202,3203,3209],{},"Ключова ідея: ",[2995,3204,3205,3208],{},[2968,3206,3207],{},"connection.close()"," не закриває реальне TCP-з'єднання"," — воно повертає з'єднання до пулу для повторного використання. Наступний запит отримає вже готове з'єднання без жодного рукостискання.",[3211,3212,3213,3234],"card-group",{},[3214,3215,3218],"card",{"icon":3216,"title":3217},"i-heroicons-x-circle","Без пулу",[3219,3220,3221,3225,3228,3231],"ul",{},[3222,3223,3224],"li",{},"Кожен запит: ~100 мс на з'єднання",[3222,3226,3227],{},"100 одночасних запитів = 100 нових TCP-з'єднань",[3222,3229,3230],{},"Піки навантаження = піки часу відгуку",[3222,3232,3233],{},"БД може відхилити надмірну кількість з'єднань",[3214,3235,3238],{"icon":3236,"title":3237},"i-heroicons-check-circle","З пулом",[3219,3239,3240,3243,3246,3249],{},[3222,3241,3242],{},"Перший запит: ~100 мс; всі наступні: ~0 мс",[3222,3244,3245],{},"100 одночасних запитів = 10–20 з'єднань у пулі",[3222,3247,3248],{},"Піки навантаження = черга очікування (не нові з'єднання)",[3222,3250,3251],{},"БД завжди бачить передбачувану кількість з'єднань",[3253,3254],"hr",{},[2959,3256,3258],{"id":3257},"реалізація-власного-connectionpool","Реалізація власного ConnectionPool",[2964,3260,3261,3262,3265],{},"Ми реалізуємо пул з'єднань з нуля — не тому що це практичний підхід для production (там використовують HikariCP), а тому що ",[2995,3263,3264],{},"реалізація власного пулу є найкращим способом зрозуміти, як він працює",". Кожне рішення в коді нижче — це відповідь на конкретну проблему.",[2987,3267,3269],{"id":3268},"конфігурація-пулу","Конфігурація пулу",[2964,3271,3272],{},"Спочатку оголосимо параметри, що керують поведінкою пулу:",[3063,3274,3279],{"className":3275,"code":3276,"language":3277,"meta":3278,"style":3071},"language-java shiki shiki-themes light-plus dark-plus dark-plus","package com.example.audiobook.db;\n\n/**\n * Незмінна конфігурація пулу з'єднань.\n * Record-клас гарантує, що параметри не можуть бути змінені після створення.\n */\npublic record PoolConfig(\n    String url,           // JDBC URL бази даних\n    String user,          // Ім'я користувача\n    String password,      // Пароль\n    int minConnections,   // Мінімальна кількість з'єднань (завжди в пулі)\n    int maxConnections,   // Максимальна кількість з'єднань (верхня межа)\n    long timeoutMs        // Максимальний час очікування вільного з'єднання (мс)\n) {\n    /** Валідація параметрів при створенні конфігурації */\n    public PoolConfig {\n        if (minConnections \u003C 1)\n            throw new IllegalArgumentException(\"minConnections має бути >= 1\");\n        if (maxConnections \u003C minConnections)\n            throw new IllegalArgumentException(\"maxConnections >= minConnections\");\n        if (timeoutMs \u003C 0)\n            throw new IllegalArgumentException(\"timeoutMs >= 0\");\n    }\n\n    /** Зручний фабричний метод для H2 з налаштуваннями за замовчуванням */\n    public static PoolConfig forH2(String dbPath) {\n        return new PoolConfig(\n            \"jdbc:h2:\" + dbPath + \";MODE=PostgreSQL;DB_CLOSE_DELAY=-1\",\n            \"sa\", \"\",\n            2,     // Мінімум 2 з'єднання завжди готові\n            10,    // Максимум 10 одночасних з'єднань\n            5000L  // Якщо пул вичерпано — чекати максимум 5 секунд\n        );\n    }\n}\n","java","showLineNumbers",[2968,3280,3281,3291,3295,3301,3306,3311,3316,3331,3342,3352,3362,3373,3383,3394,3399,3404,3415,3432,3454,3462,3478,3491,3507,3513,3518,3524,3548,3560,3575,3588,3600,3612,3621,3627,3632],{"__ignoreMap":3071},[3104,3282,3283,3287],{"class":3106,"line":3107},[3104,3284,3286],{"class":3285},"su1O8","package",[3104,3288,3290],{"class":3289},"sHH4Y"," com.example.audiobook.db;\n",[3104,3292,3293],{"class":3106,"line":3113},[3104,3294,3135],{"emptyLinePlaceholder":3134},[3104,3296,3297],{"class":3106,"line":3119},[3104,3298,3300],{"class":3299},"spJ8K","/**\n",[3104,3302,3303],{"class":3106,"line":3125},[3104,3304,3305],{"class":3299}," * Незмінна конфігурація пулу з'єднань.\n",[3104,3307,3308],{"class":3106,"line":3131},[3104,3309,3310],{"class":3299}," * Record-клас гарантує, що параметри не можуть бути змінені після створення.\n",[3104,3312,3313],{"class":3106,"line":3138},[3104,3314,3315],{"class":3299}," */\n",[3104,3317,3318,3321,3324,3328],{"class":3106,"line":3144},[3104,3319,3320],{"class":3285},"public",[3104,3322,3323],{"class":3285}," record",[3104,3325,3327],{"class":3326},"sN1BT"," PoolConfig",[3104,3329,3330],{"class":3289},"(\n",[3104,3332,3333,3336,3339],{"class":3106,"line":3150},[3104,3334,3335],{"class":3326},"    String",[3104,3337,3338],{"class":3289}," url,           ",[3104,3340,3341],{"class":3299},"// JDBC URL бази даних\n",[3104,3343,3344,3346,3349],{"class":3106,"line":3156},[3104,3345,3335],{"class":3326},[3104,3347,3348],{"class":3289}," user,          ",[3104,3350,3351],{"class":3299},"// Ім'я користувача\n",[3104,3353,3354,3356,3359],{"class":3106,"line":3161},[3104,3355,3335],{"class":3326},[3104,3357,3358],{"class":3289}," password,      ",[3104,3360,3361],{"class":3299},"// Пароль\n",[3104,3363,3364,3367,3370],{"class":3106,"line":3167},[3104,3365,3366],{"class":3326},"    int",[3104,3368,3369],{"class":3289}," minConnections,   ",[3104,3371,3372],{"class":3299},"// Мінімальна кількість з'єднань (завжди в пулі)\n",[3104,3374,3375,3377,3380],{"class":3106,"line":3173},[3104,3376,3366],{"class":3326},[3104,3378,3379],{"class":3289}," maxConnections,   ",[3104,3381,3382],{"class":3299},"// Максимальна кількість з'єднань (верхня межа)\n",[3104,3384,3385,3388,3391],{"class":3106,"line":3179},[3104,3386,3387],{"class":3326},"    long",[3104,3389,3390],{"class":3289}," timeoutMs        ",[3104,3392,3393],{"class":3299},"// Максимальний час очікування вільного з'єднання (мс)\n",[3104,3395,3396],{"class":3106,"line":3185},[3104,3397,3398],{"class":3289},") {\n",[3104,3400,3401],{"class":3106,"line":3191},[3104,3402,3403],{"class":3299},"    /** Валідація параметрів при створенні конфігурації */\n",[3104,3405,3406,3409,3412],{"class":3106,"line":3196},[3104,3407,3408],{"class":3285},"    public",[3104,3410,3327],{"class":3411},"s8Opu",[3104,3413,3414],{"class":3289}," {\n",[3104,3416,3418,3422,3425,3429],{"class":3106,"line":3417},17,[3104,3419,3421],{"class":3420},"sCDza","        if",[3104,3423,3424],{"class":3289}," (minConnections \u003C ",[3104,3426,3428],{"class":3427},"sJj4R","1",[3104,3430,3431],{"class":3289},")\n",[3104,3433,3435,3438,3441,3444,3447,3451],{"class":3106,"line":3434},18,[3104,3436,3437],{"class":3420},"            throw",[3104,3439,3440],{"class":3420}," new",[3104,3442,3443],{"class":3411}," IllegalArgumentException",[3104,3445,3446],{"class":3289},"(",[3104,3448,3450],{"class":3449},"sbdoH","\"minConnections має бути >= 1\"",[3104,3452,3453],{"class":3289},");\n",[3104,3455,3457,3459],{"class":3106,"line":3456},19,[3104,3458,3421],{"class":3420},[3104,3460,3461],{"class":3289}," (maxConnections \u003C minConnections)\n",[3104,3463,3465,3467,3469,3471,3473,3476],{"class":3106,"line":3464},20,[3104,3466,3437],{"class":3420},[3104,3468,3440],{"class":3420},[3104,3470,3443],{"class":3411},[3104,3472,3446],{"class":3289},[3104,3474,3475],{"class":3449},"\"maxConnections >= minConnections\"",[3104,3477,3453],{"class":3289},[3104,3479,3481,3483,3486,3489],{"class":3106,"line":3480},21,[3104,3482,3421],{"class":3420},[3104,3484,3485],{"class":3289}," (timeoutMs \u003C ",[3104,3487,3488],{"class":3427},"0",[3104,3490,3431],{"class":3289},[3104,3492,3494,3496,3498,3500,3502,3505],{"class":3106,"line":3493},22,[3104,3495,3437],{"class":3420},[3104,3497,3440],{"class":3420},[3104,3499,3443],{"class":3411},[3104,3501,3446],{"class":3289},[3104,3503,3504],{"class":3449},"\"timeoutMs >= 0\"",[3104,3506,3453],{"class":3289},[3104,3508,3510],{"class":3106,"line":3509},23,[3104,3511,3512],{"class":3289},"    }\n",[3104,3514,3516],{"class":3106,"line":3515},24,[3104,3517,3135],{"emptyLinePlaceholder":3134},[3104,3519,3521],{"class":3106,"line":3520},25,[3104,3522,3523],{"class":3299},"    /** Зручний фабричний метод для H2 з налаштуваннями за замовчуванням */\n",[3104,3525,3527,3529,3532,3534,3537,3539,3542,3546],{"class":3106,"line":3526},26,[3104,3528,3408],{"class":3285},[3104,3530,3531],{"class":3285}," static",[3104,3533,3327],{"class":3326},[3104,3535,3536],{"class":3411}," forH2",[3104,3538,3446],{"class":3289},[3104,3540,3541],{"class":3326},"String",[3104,3543,3545],{"class":3544},"siwwj"," dbPath",[3104,3547,3398],{"class":3289},[3104,3549,3551,3554,3556,3558],{"class":3106,"line":3550},27,[3104,3552,3553],{"class":3420},"        return",[3104,3555,3440],{"class":3420},[3104,3557,3327],{"class":3411},[3104,3559,3330],{"class":3289},[3104,3561,3563,3566,3569,3572],{"class":3106,"line":3562},28,[3104,3564,3565],{"class":3449},"            \"jdbc:h2:\"",[3104,3567,3568],{"class":3289}," + dbPath + ",[3104,3570,3571],{"class":3449},"\";MODE=PostgreSQL;DB_CLOSE_DELAY=-1\"",[3104,3573,3574],{"class":3289},",\n",[3104,3576,3578,3581,3583,3586],{"class":3106,"line":3577},29,[3104,3579,3580],{"class":3449},"            \"sa\"",[3104,3582,3030],{"class":3289},[3104,3584,3585],{"class":3449},"\"\"",[3104,3587,3574],{"class":3289},[3104,3589,3591,3594,3597],{"class":3106,"line":3590},30,[3104,3592,3593],{"class":3427},"            2",[3104,3595,3596],{"class":3289},",     ",[3104,3598,3599],{"class":3299},"// Мінімум 2 з'єднання завжди готові\n",[3104,3601,3603,3606,3609],{"class":3106,"line":3602},31,[3104,3604,3605],{"class":3427},"            10",[3104,3607,3608],{"class":3289},",    ",[3104,3610,3611],{"class":3299},"// Максимум 10 одночасних з'єднань\n",[3104,3613,3615,3618],{"class":3106,"line":3614},32,[3104,3616,3617],{"class":3427},"            5000L",[3104,3619,3620],{"class":3299},"  // Якщо пул вичерпано — чекати максимум 5 секунд\n",[3104,3622,3624],{"class":3106,"line":3623},33,[3104,3625,3626],{"class":3289},"        );\n",[3104,3628,3630],{"class":3106,"line":3629},34,[3104,3631,3512],{"class":3289},[3104,3633,3635],{"class":3106,"line":3634},35,[3104,3636,3637],{"class":3289},"}\n",[2987,3639,3641],{"id":3640},"основний-клас-simpleconnectionpool","Основний клас SimpleConnectionPool",[3063,3643,3645],{"className":3275,"code":3644,"language":3277,"meta":3278,"style":3071},"package com.example.audiobook.db;\n\nimport java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\nimport java.util.ArrayList;\nimport java.util.List;\nimport java.util.concurrent.ArrayBlockingQueue;\nimport java.util.concurrent.BlockingQueue;\nimport java.util.concurrent.TimeUnit;\nimport java.util.concurrent.atomic.AtomicInteger;\n\n/**\n * Власна реалізація Connection Pool на основі патерну Object Pool.\n * \u003Cp>\n * Ключові компоненти:\n * \u003Cul>\n *   \u003Cli>{@code availableConnections} — черга вільних з'єднань (BlockingQueue)\u003C/li>\n *   \u003Cli>{@code totalConnections} — атомарний лічильник всіх відкритих з'єднань\u003C/li>\n *   \u003Cli>{@code PooledConnection} — Proxy-обгортка, що перехоплює close()\u003C/li>\n * \u003C/ul>\n */\npublic class SimpleConnectionPool implements AutoCloseable {\n\n    private final PoolConfig config;\n\n    /**\n     * BlockingQueue — потокобезпечна черга.\n     * poll(timeout) блокує поточний потік до появи вільного з'єднання\n     * або до закінчення timeout — ідеально для управління очікуванням.\n     */\n    private final BlockingQueue\u003CConnection> availableConnections;\n\n    /**\n     * AtomicInteger — потокобезпечний лічильник без synchronized.\n     * Відстежує загальну кількість відкритих з'єднань (вільних + зайнятих).\n     */\n    private final AtomicInteger totalConnections = new AtomicInteger(0);\n\n    /** Прапорець закриття пулу — після close() нові з'єднання не видаються */\n    private volatile boolean closed = false;\n\n    /**\n     * Ініціалізує пул і відкриває мінімальну кількість з'єднань.\n     * При помилці вже відкриті з'єднання закриваються — без витоків.\n     */\n    public SimpleConnectionPool(PoolConfig config) {\n        this.config = config;\n        this.availableConnections = new ArrayBlockingQueue\u003C>(config.maxConnections());\n\n        try {\n            for (int i = 0; i \u003C config.minConnections(); i++) {\n                availableConnections.add(createRealConnection());\n            }\n        } catch (SQLException e) {\n            // Якщо ініціалізація провалилась — закриваємо вже відкриті з'єднання\n            close();\n            throw new DatabaseException(\"Не вдалося ініціалізувати Connection Pool\", e);\n        }\n\n        System.out.printf(\"[Pool] Ініціалізовано: %d з'єднань готові%n\",\n            config.minConnections());\n    }\n\n    /**\n     * Повертає з'єднання з пулу або створює нове, якщо не перевищено максимум.\n     * Якщо пул вичерпано — блокує поточний потік на timeout мілісекунд.\n     *\n     * @throws DatabaseException якщо з'єднання недоступне впродовж timeout\n     */\n    public Connection getConnection() {\n        if (closed) {\n            throw new DatabaseException(\"Connection Pool закрито\", null);\n        }\n\n        // Спроба 1: взяти вільне з'єднання без очікування\n        Connection conn = availableConnections.poll();\n\n        if (conn == null) {\n            // Вільних з'єднань немає — чи можемо створити нове?\n            int current = totalConnections.get();\n            if (current \u003C config.maxConnections()) {\n                // Є місце у пулі — створюємо нове з'єднання\n                if (totalConnections.compareAndSet(current, current + 1)) {\n                    try {\n                        conn = createRealConnection();\n                        System.out.printf(\"[Pool] Нове з'єднання: всього %d/%d%n\",\n                            totalConnections.get(), config.maxConnections());\n                    } catch (SQLException e) {\n                        totalConnections.decrementAndGet();\n                        throw new DatabaseException(\"Не вдалося створити з'єднання\", e);\n                    }\n                }\n            }\n\n            if (conn == null) {\n                // Пул вичерпано — чекаємо вільного з'єднання\n                try {\n                    conn = availableConnections.poll(\n                        config.timeoutMs(), TimeUnit.MILLISECONDS\n                    );\n                } catch (InterruptedException e) {\n                    Thread.currentThread().interrupt();\n                    throw new DatabaseException(\"Очікування з'єднання перервано\", e);\n                }\n\n                if (conn == null) {\n                    throw new DatabaseException(\n                        String.format(\"З'єднання недоступне впродовж %d мс. \" +\n                            \"Пул вичерпано (%d/%d)\",\n                            config.timeoutMs(),\n                            totalConnections.get(),\n                            config.maxConnections()), null\n                    );\n                }\n            }\n        }\n\n        // Обгортаємо у Proxy перед видачею клієнту\n        return new PooledConnection(conn, this);\n    }\n\n    /**\n     * Повертає з'єднання до пулу.\n     * Викликається з PooledConnection.close() — не безпосередньо клієнтом.\n     */\n    void returnConnection(Connection realConnection) {\n        if (closed) {\n            // Пул закрито під час використання з'єднання — закриваємо реально\n            closeQuietly(realConnection);\n            totalConnections.decrementAndGet();\n            return;\n        }\n\n        // Валідація перед поверненням: чи з'єднання ще живе?\n        if (isConnectionValid(realConnection)) {\n            availableConnections.offer(realConnection);\n        } else {\n            // З'єднання \"протухло\" (BrokenPipe, timeout) — відкидаємо, лічильник зменшуємо\n            closeQuietly(realConnection);\n            totalConnections.decrementAndGet();\n            System.out.println(\"[Pool] З'єднання відхилено (невалідне), видалено з пулу\");\n        }\n    }\n\n    /** Перевіряє, чи з'єднання ще активне */\n    private boolean isConnectionValid(Connection conn) {\n        try {\n            // isValid(timeout) — стандартний JDBC-метод: надсилає ping до БД\n            return !conn.isClosed() && conn.isValid(1);\n        } catch (SQLException e) {\n            return false;\n        }\n    }\n\n    /** Створює реальне фізичне TCP-з'єднання з БД */\n    private Connection createRealConnection() throws SQLException {\n        Connection conn = DriverManager.getConnection(\n            config.url(), config.user(), config.password()\n        );\n        totalConnections.incrementAndGet();\n        return conn;\n    }\n\n    /** Закриває з'єднання без викидання виключень */\n    private void closeQuietly(Connection conn) {\n        try { conn.close(); } catch (SQLException ignored) {}\n    }\n\n    /** Діагностичний метод: скільки з'єднань зараз вільні */\n    public int availableCount() { return availableConnections.size(); }\n\n    /** Діагностичний метод: загальна кількість відкритих з'єднань */\n    public int totalCount()     { return totalConnections.get(); }\n\n    /**\n     * Закриває пул: встановлює прапорець closed і закриває всі вільні з'єднання.\n     * З'єднання, що зараз використовуються, закриються при поверненні в пул.\n     */\n    @Override\n    public void close() {\n        closed = true;\n        List\u003CConnection> toClose = new ArrayList\u003C>();\n        availableConnections.drainTo(toClose);\n        toClose.forEach(this::closeQuietly);\n        System.out.printf(\"[Pool] Закрито. Закрито %d з'єднань%n\", toClose.size());\n    }\n}\n",[2968,3646,3647,3653,3657,3665,3672,3679,3686,3693,3700,3707,3714,3721,3725,3729,3734,3739,3744,3749,3754,3759,3764,3769,3773,3791,3795,3811,3815,3820,3825,3830,3835,3840,3863,3867,3871,3876,3882,3887,3914,3919,3925,3946,3951,3956,3962,3968,3973,3989,4003,4032,4037,4045,4077,4095,4101,4120,4126,4135,4153,4159,4164,4187,4199,4204,4209,4214,4220,4226,4232,4246,4251,4265,4273,4294,4299,4304,4310,4330,4335,4347,4353,4374,4392,4398,4421,4429,4439,4460,4481,4497,4510,4527,4533,4539,4544,4549,4560,4566,4574,4588,4609,4615,4632,4651,4668,4673,4678,4689,4700,4719,4727,4740,4751,4766,4771,4776,4781,4786,4791,4797,4815,4820,4825,4830,4836,4842,4847,4865,4872,4878,4887,4899,4907,4912,4917,4923,4936,4949,4959,4965,4972,4983,5005,5010,5015,5020,5026,5044,5051,5057,5089,5104,5114,5119,5124,5129,5135,5156,5175,5206,5211,5224,5232,5237,5242,5248,5267,5297,5302,5307,5313,5341,5346,5352,5375,5380,5385,5391,5397,5402,5411,5423,5434,5459,5473,5494,5522,5527],{"__ignoreMap":3071},[3104,3648,3649,3651],{"class":3106,"line":3107},[3104,3650,3286],{"class":3285},[3104,3652,3290],{"class":3289},[3104,3654,3655],{"class":3106,"line":3113},[3104,3656,3135],{"emptyLinePlaceholder":3134},[3104,3658,3659,3662],{"class":3106,"line":3119},[3104,3660,3661],{"class":3285},"import",[3104,3663,3664],{"class":3289}," java.sql.Connection;\n",[3104,3666,3667,3669],{"class":3106,"line":3125},[3104,3668,3661],{"class":3285},[3104,3670,3671],{"class":3289}," java.sql.DriverManager;\n",[3104,3673,3674,3676],{"class":3106,"line":3131},[3104,3675,3661],{"class":3285},[3104,3677,3678],{"class":3289}," java.sql.SQLException;\n",[3104,3680,3681,3683],{"class":3106,"line":3138},[3104,3682,3661],{"class":3285},[3104,3684,3685],{"class":3289}," java.util.ArrayList;\n",[3104,3687,3688,3690],{"class":3106,"line":3144},[3104,3689,3661],{"class":3285},[3104,3691,3692],{"class":3289}," java.util.List;\n",[3104,3694,3695,3697],{"class":3106,"line":3150},[3104,3696,3661],{"class":3285},[3104,3698,3699],{"class":3289}," java.util.concurrent.ArrayBlockingQueue;\n",[3104,3701,3702,3704],{"class":3106,"line":3156},[3104,3703,3661],{"class":3285},[3104,3705,3706],{"class":3289}," java.util.concurrent.BlockingQueue;\n",[3104,3708,3709,3711],{"class":3106,"line":3161},[3104,3710,3661],{"class":3285},[3104,3712,3713],{"class":3289}," java.util.concurrent.TimeUnit;\n",[3104,3715,3716,3718],{"class":3106,"line":3167},[3104,3717,3661],{"class":3285},[3104,3719,3720],{"class":3289}," java.util.concurrent.atomic.AtomicInteger;\n",[3104,3722,3723],{"class":3106,"line":3173},[3104,3724,3135],{"emptyLinePlaceholder":3134},[3104,3726,3727],{"class":3106,"line":3179},[3104,3728,3300],{"class":3299},[3104,3730,3731],{"class":3106,"line":3185},[3104,3732,3733],{"class":3299}," * Власна реалізація Connection Pool на основі патерну Object Pool.\n",[3104,3735,3736],{"class":3106,"line":3191},[3104,3737,3738],{"class":3299}," * \u003Cp>\n",[3104,3740,3741],{"class":3106,"line":3196},[3104,3742,3743],{"class":3299}," * Ключові компоненти:\n",[3104,3745,3746],{"class":3106,"line":3417},[3104,3747,3748],{"class":3299}," * \u003Cul>\n",[3104,3750,3751],{"class":3106,"line":3434},[3104,3752,3753],{"class":3299}," *   \u003Cli>{@code availableConnections} — черга вільних з'єднань (BlockingQueue)\u003C/li>\n",[3104,3755,3756],{"class":3106,"line":3456},[3104,3757,3758],{"class":3299}," *   \u003Cli>{@code totalConnections} — атомарний лічильник всіх відкритих з'єднань\u003C/li>\n",[3104,3760,3761],{"class":3106,"line":3464},[3104,3762,3763],{"class":3299}," *   \u003Cli>{@code PooledConnection} — Proxy-обгортка, що перехоплює close()\u003C/li>\n",[3104,3765,3766],{"class":3106,"line":3480},[3104,3767,3768],{"class":3299}," * \u003C/ul>\n",[3104,3770,3771],{"class":3106,"line":3493},[3104,3772,3315],{"class":3299},[3104,3774,3775,3777,3780,3783,3786,3789],{"class":3106,"line":3509},[3104,3776,3320],{"class":3285},[3104,3778,3779],{"class":3285}," class",[3104,3781,3782],{"class":3326}," SimpleConnectionPool",[3104,3784,3785],{"class":3285}," implements",[3104,3787,3788],{"class":3326}," AutoCloseable",[3104,3790,3414],{"class":3289},[3104,3792,3793],{"class":3106,"line":3515},[3104,3794,3135],{"emptyLinePlaceholder":3134},[3104,3796,3797,3800,3803,3805,3808],{"class":3106,"line":3520},[3104,3798,3799],{"class":3285},"    private",[3104,3801,3802],{"class":3285}," final",[3104,3804,3327],{"class":3326},[3104,3806,3807],{"class":3544}," config",[3104,3809,3810],{"class":3289},";\n",[3104,3812,3813],{"class":3106,"line":3526},[3104,3814,3135],{"emptyLinePlaceholder":3134},[3104,3816,3817],{"class":3106,"line":3550},[3104,3818,3819],{"class":3299},"    /**\n",[3104,3821,3822],{"class":3106,"line":3562},[3104,3823,3824],{"class":3299},"     * BlockingQueue — потокобезпечна черга.\n",[3104,3826,3827],{"class":3106,"line":3577},[3104,3828,3829],{"class":3299},"     * poll(timeout) блокує поточний потік до появи вільного з'єднання\n",[3104,3831,3832],{"class":3106,"line":3590},[3104,3833,3834],{"class":3299},"     * або до закінчення timeout — ідеально для управління очікуванням.\n",[3104,3836,3837],{"class":3106,"line":3602},[3104,3838,3839],{"class":3299},"     */\n",[3104,3841,3842,3844,3846,3849,3852,3855,3858,3861],{"class":3106,"line":3614},[3104,3843,3799],{"class":3285},[3104,3845,3802],{"class":3285},[3104,3847,3848],{"class":3326}," BlockingQueue",[3104,3850,3851],{"class":3289},"\u003C",[3104,3853,3854],{"class":3326},"Connection",[3104,3856,3857],{"class":3289},"> ",[3104,3859,3860],{"class":3544},"availableConnections",[3104,3862,3810],{"class":3289},[3104,3864,3865],{"class":3106,"line":3623},[3104,3866,3135],{"emptyLinePlaceholder":3134},[3104,3868,3869],{"class":3106,"line":3629},[3104,3870,3819],{"class":3299},[3104,3872,3873],{"class":3106,"line":3634},[3104,3874,3875],{"class":3299},"     * AtomicInteger — потокобезпечний лічильник без synchronized.\n",[3104,3877,3879],{"class":3106,"line":3878},36,[3104,3880,3881],{"class":3299},"     * Відстежує загальну кількість відкритих з'єднань (вільних + зайнятих).\n",[3104,3883,3885],{"class":3106,"line":3884},37,[3104,3886,3839],{"class":3299},[3104,3888,3890,3892,3894,3897,3900,3903,3906,3908,3910,3912],{"class":3106,"line":3889},38,[3104,3891,3799],{"class":3285},[3104,3893,3802],{"class":3285},[3104,3895,3896],{"class":3326}," AtomicInteger",[3104,3898,3899],{"class":3544}," totalConnections",[3104,3901,3902],{"class":3289}," = ",[3104,3904,3905],{"class":3420},"new",[3104,3907,3896],{"class":3411},[3104,3909,3446],{"class":3289},[3104,3911,3488],{"class":3427},[3104,3913,3453],{"class":3289},[3104,3915,3917],{"class":3106,"line":3916},39,[3104,3918,3135],{"emptyLinePlaceholder":3134},[3104,3920,3922],{"class":3106,"line":3921},40,[3104,3923,3924],{"class":3299},"    /** Прапорець закриття пулу — після close() нові з'єднання не видаються */\n",[3104,3926,3928,3930,3933,3936,3939,3941,3944],{"class":3106,"line":3927},41,[3104,3929,3799],{"class":3285},[3104,3931,3932],{"class":3285}," volatile",[3104,3934,3935],{"class":3326}," boolean",[3104,3937,3938],{"class":3544}," closed",[3104,3940,3902],{"class":3289},[3104,3942,3943],{"class":3285},"false",[3104,3945,3810],{"class":3289},[3104,3947,3949],{"class":3106,"line":3948},42,[3104,3950,3135],{"emptyLinePlaceholder":3134},[3104,3952,3954],{"class":3106,"line":3953},43,[3104,3955,3819],{"class":3299},[3104,3957,3959],{"class":3106,"line":3958},44,[3104,3960,3961],{"class":3299},"     * Ініціалізує пул і відкриває мінімальну кількість з'єднань.\n",[3104,3963,3965],{"class":3106,"line":3964},45,[3104,3966,3967],{"class":3299},"     * При помилці вже відкриті з'єднання закриваються — без витоків.\n",[3104,3969,3971],{"class":3106,"line":3970},46,[3104,3972,3839],{"class":3299},[3104,3974,3976,3978,3980,3982,3985,3987],{"class":3106,"line":3975},47,[3104,3977,3408],{"class":3285},[3104,3979,3782],{"class":3411},[3104,3981,3446],{"class":3289},[3104,3983,3984],{"class":3326},"PoolConfig",[3104,3986,3807],{"class":3544},[3104,3988,3398],{"class":3289},[3104,3990,3992,3995,3997,4000],{"class":3106,"line":3991},48,[3104,3993,3994],{"class":3285},"        this",[3104,3996,3009],{"class":3289},[3104,3998,3999],{"class":3544},"config",[3104,4001,4002],{"class":3289}," = config;\n",[3104,4004,4006,4008,4010,4012,4014,4016,4019,4022,4024,4026,4029],{"class":3106,"line":4005},49,[3104,4007,3994],{"class":3285},[3104,4009,3009],{"class":3289},[3104,4011,3860],{"class":3544},[3104,4013,3902],{"class":3289},[3104,4015,3905],{"class":3420},[3104,4017,4018],{"class":3326}," ArrayBlockingQueue",[3104,4020,4021],{"class":3289},"\u003C>(",[3104,4023,3999],{"class":3544},[3104,4025,3009],{"class":3289},[3104,4027,4028],{"class":3411},"maxConnections",[3104,4030,4031],{"class":3289},"());\n",[3104,4033,4035],{"class":3106,"line":4034},50,[3104,4036,3135],{"emptyLinePlaceholder":3134},[3104,4038,4040,4043],{"class":3106,"line":4039},51,[3104,4041,4042],{"class":3420},"        try",[3104,4044,3414],{"class":3289},[3104,4046,4048,4051,4054,4057,4060,4062,4064,4067,4069,4071,4074],{"class":3106,"line":4047},52,[3104,4049,4050],{"class":3420},"            for",[3104,4052,4053],{"class":3289}," (",[3104,4055,4056],{"class":3326},"int",[3104,4058,4059],{"class":3544}," i",[3104,4061,3902],{"class":3289},[3104,4063,3488],{"class":3427},[3104,4065,4066],{"class":3289},"; i \u003C ",[3104,4068,3999],{"class":3544},[3104,4070,3009],{"class":3289},[3104,4072,4073],{"class":3411},"minConnections",[3104,4075,4076],{"class":3289},"(); i++) {\n",[3104,4078,4080,4083,4085,4088,4090,4093],{"class":3106,"line":4079},53,[3104,4081,4082],{"class":3544},"                availableConnections",[3104,4084,3009],{"class":3289},[3104,4086,4087],{"class":3411},"add",[3104,4089,3446],{"class":3289},[3104,4091,4092],{"class":3411},"createRealConnection",[3104,4094,4031],{"class":3289},[3104,4096,4098],{"class":3106,"line":4097},54,[3104,4099,4100],{"class":3289},"            }\n",[3104,4102,4104,4107,4110,4112,4115,4118],{"class":3106,"line":4103},55,[3104,4105,4106],{"class":3289},"        } ",[3104,4108,4109],{"class":3420},"catch",[3104,4111,4053],{"class":3289},[3104,4113,4114],{"class":3326},"SQLException",[3104,4116,4117],{"class":3544}," e",[3104,4119,3398],{"class":3289},[3104,4121,4123],{"class":3106,"line":4122},56,[3104,4124,4125],{"class":3299},"            // Якщо ініціалізація провалилась — закриваємо вже відкриті з'єднання\n",[3104,4127,4129,4132],{"class":3106,"line":4128},57,[3104,4130,4131],{"class":3411},"            close",[3104,4133,4134],{"class":3289},"();\n",[3104,4136,4138,4140,4142,4145,4147,4150],{"class":3106,"line":4137},58,[3104,4139,3437],{"class":3420},[3104,4141,3440],{"class":3420},[3104,4143,4144],{"class":3411}," DatabaseException",[3104,4146,3446],{"class":3289},[3104,4148,4149],{"class":3449},"\"Не вдалося ініціалізувати Connection Pool\"",[3104,4151,4152],{"class":3289},", e);\n",[3104,4154,4156],{"class":3106,"line":4155},59,[3104,4157,4158],{"class":3289},"        }\n",[3104,4160,4162],{"class":3106,"line":4161},60,[3104,4163,3135],{"emptyLinePlaceholder":3134},[3104,4165,4167,4170,4172,4175,4177,4180,4182,4185],{"class":3106,"line":4166},61,[3104,4168,4169],{"class":3544},"        System",[3104,4171,3009],{"class":3289},[3104,4173,4174],{"class":3544},"out",[3104,4176,3009],{"class":3289},[3104,4178,4179],{"class":3411},"printf",[3104,4181,3446],{"class":3289},[3104,4183,4184],{"class":3449},"\"[Pool] Ініціалізовано: %d з'єднань готові%n\"",[3104,4186,3574],{"class":3289},[3104,4188,4190,4193,4195,4197],{"class":3106,"line":4189},62,[3104,4191,4192],{"class":3544},"            config",[3104,4194,3009],{"class":3289},[3104,4196,4073],{"class":3411},[3104,4198,4031],{"class":3289},[3104,4200,4202],{"class":3106,"line":4201},63,[3104,4203,3512],{"class":3289},[3104,4205,4207],{"class":3106,"line":4206},64,[3104,4208,3135],{"emptyLinePlaceholder":3134},[3104,4210,4212],{"class":3106,"line":4211},65,[3104,4213,3819],{"class":3299},[3104,4215,4217],{"class":3106,"line":4216},66,[3104,4218,4219],{"class":3299},"     * Повертає з'єднання з пулу або створює нове, якщо не перевищено максимум.\n",[3104,4221,4223],{"class":3106,"line":4222},67,[3104,4224,4225],{"class":3299},"     * Якщо пул вичерпано — блокує поточний потік на timeout мілісекунд.\n",[3104,4227,4229],{"class":3106,"line":4228},68,[3104,4230,4231],{"class":3299},"     *\n",[3104,4233,4235,4238,4241,4243],{"class":3106,"line":4234},69,[3104,4236,4237],{"class":3299},"     * ",[3104,4239,4240],{"class":3285},"@throws",[3104,4242,4144],{"class":3326},[3104,4244,4245],{"class":3299}," якщо з'єднання недоступне впродовж timeout\n",[3104,4247,4249],{"class":3106,"line":4248},70,[3104,4250,3839],{"class":3299},[3104,4252,4254,4256,4259,4262],{"class":3106,"line":4253},71,[3104,4255,3408],{"class":3285},[3104,4257,4258],{"class":3326}," Connection",[3104,4260,4261],{"class":3411}," getConnection",[3104,4263,4264],{"class":3289},"() {\n",[3104,4266,4268,4270],{"class":3106,"line":4267},72,[3104,4269,3421],{"class":3420},[3104,4271,4272],{"class":3289}," (closed) {\n",[3104,4274,4276,4278,4280,4282,4284,4287,4289,4292],{"class":3106,"line":4275},73,[3104,4277,3437],{"class":3420},[3104,4279,3440],{"class":3420},[3104,4281,4144],{"class":3411},[3104,4283,3446],{"class":3289},[3104,4285,4286],{"class":3449},"\"Connection Pool закрито\"",[3104,4288,3030],{"class":3289},[3104,4290,4291],{"class":3285},"null",[3104,4293,3453],{"class":3289},[3104,4295,4297],{"class":3106,"line":4296},74,[3104,4298,4158],{"class":3289},[3104,4300,4302],{"class":3106,"line":4301},75,[3104,4303,3135],{"emptyLinePlaceholder":3134},[3104,4305,4307],{"class":3106,"line":4306},76,[3104,4308,4309],{"class":3299},"        // Спроба 1: взяти вільне з'єднання без очікування\n",[3104,4311,4313,4316,4319,4321,4323,4325,4328],{"class":3106,"line":4312},77,[3104,4314,4315],{"class":3326},"        Connection",[3104,4317,4318],{"class":3544}," conn",[3104,4320,3902],{"class":3289},[3104,4322,3860],{"class":3544},[3104,4324,3009],{"class":3289},[3104,4326,4327],{"class":3411},"poll",[3104,4329,4134],{"class":3289},[3104,4331,4333],{"class":3106,"line":4332},78,[3104,4334,3135],{"emptyLinePlaceholder":3134},[3104,4336,4338,4340,4343,4345],{"class":3106,"line":4337},79,[3104,4339,3421],{"class":3420},[3104,4341,4342],{"class":3289}," (conn == ",[3104,4344,4291],{"class":3285},[3104,4346,3398],{"class":3289},[3104,4348,4350],{"class":3106,"line":4349},80,[3104,4351,4352],{"class":3299},"            // Вільних з'єднань немає — чи можемо створити нове?\n",[3104,4354,4356,4359,4362,4364,4367,4369,4372],{"class":3106,"line":4355},81,[3104,4357,4358],{"class":3326},"            int",[3104,4360,4361],{"class":3544}," current",[3104,4363,3902],{"class":3289},[3104,4365,4366],{"class":3544},"totalConnections",[3104,4368,3009],{"class":3289},[3104,4370,4371],{"class":3411},"get",[3104,4373,4134],{"class":3289},[3104,4375,4377,4380,4383,4385,4387,4389],{"class":3106,"line":4376},82,[3104,4378,4379],{"class":3420},"            if",[3104,4381,4382],{"class":3289}," (current \u003C ",[3104,4384,3999],{"class":3544},[3104,4386,3009],{"class":3289},[3104,4388,4028],{"class":3411},[3104,4390,4391],{"class":3289},"()) {\n",[3104,4393,4395],{"class":3106,"line":4394},83,[3104,4396,4397],{"class":3299},"                // Є місце у пулі — створюємо нове з'єднання\n",[3104,4399,4401,4404,4406,4408,4410,4413,4416,4418],{"class":3106,"line":4400},84,[3104,4402,4403],{"class":3420},"                if",[3104,4405,4053],{"class":3289},[3104,4407,4366],{"class":3544},[3104,4409,3009],{"class":3289},[3104,4411,4412],{"class":3411},"compareAndSet",[3104,4414,4415],{"class":3289},"(current, current + ",[3104,4417,3428],{"class":3427},[3104,4419,4420],{"class":3289},")) {\n",[3104,4422,4424,4427],{"class":3106,"line":4423},85,[3104,4425,4426],{"class":3420},"                    try",[3104,4428,3414],{"class":3289},[3104,4430,4432,4435,4437],{"class":3106,"line":4431},86,[3104,4433,4434],{"class":3289},"                        conn = ",[3104,4436,4092],{"class":3411},[3104,4438,4134],{"class":3289},[3104,4440,4442,4445,4447,4449,4451,4453,4455,4458],{"class":3106,"line":4441},87,[3104,4443,4444],{"class":3544},"                        System",[3104,4446,3009],{"class":3289},[3104,4448,4174],{"class":3544},[3104,4450,3009],{"class":3289},[3104,4452,4179],{"class":3411},[3104,4454,3446],{"class":3289},[3104,4456,4457],{"class":3449},"\"[Pool] Нове з'єднання: всього %d/%d%n\"",[3104,4459,3574],{"class":3289},[3104,4461,4463,4466,4468,4470,4473,4475,4477,4479],{"class":3106,"line":4462},88,[3104,4464,4465],{"class":3544},"                            totalConnections",[3104,4467,3009],{"class":3289},[3104,4469,4371],{"class":3411},[3104,4471,4472],{"class":3289},"(), ",[3104,4474,3999],{"class":3544},[3104,4476,3009],{"class":3289},[3104,4478,4028],{"class":3411},[3104,4480,4031],{"class":3289},[3104,4482,4484,4487,4489,4491,4493,4495],{"class":3106,"line":4483},89,[3104,4485,4486],{"class":3289},"                    } ",[3104,4488,4109],{"class":3420},[3104,4490,4053],{"class":3289},[3104,4492,4114],{"class":3326},[3104,4494,4117],{"class":3544},[3104,4496,3398],{"class":3289},[3104,4498,4500,4503,4505,4508],{"class":3106,"line":4499},90,[3104,4501,4502],{"class":3544},"                        totalConnections",[3104,4504,3009],{"class":3289},[3104,4506,4507],{"class":3411},"decrementAndGet",[3104,4509,4134],{"class":3289},[3104,4511,4513,4516,4518,4520,4522,4525],{"class":3106,"line":4512},91,[3104,4514,4515],{"class":3420},"                        throw",[3104,4517,3440],{"class":3420},[3104,4519,4144],{"class":3411},[3104,4521,3446],{"class":3289},[3104,4523,4524],{"class":3449},"\"Не вдалося створити з'єднання\"",[3104,4526,4152],{"class":3289},[3104,4528,4530],{"class":3106,"line":4529},92,[3104,4531,4532],{"class":3289},"                    }\n",[3104,4534,4536],{"class":3106,"line":4535},93,[3104,4537,4538],{"class":3289},"                }\n",[3104,4540,4542],{"class":3106,"line":4541},94,[3104,4543,4100],{"class":3289},[3104,4545,4547],{"class":3106,"line":4546},95,[3104,4548,3135],{"emptyLinePlaceholder":3134},[3104,4550,4552,4554,4556,4558],{"class":3106,"line":4551},96,[3104,4553,4379],{"class":3420},[3104,4555,4342],{"class":3289},[3104,4557,4291],{"class":3285},[3104,4559,3398],{"class":3289},[3104,4561,4563],{"class":3106,"line":4562},97,[3104,4564,4565],{"class":3299},"                // Пул вичерпано — чекаємо вільного з'єднання\n",[3104,4567,4569,4572],{"class":3106,"line":4568},98,[3104,4570,4571],{"class":3420},"                try",[3104,4573,3414],{"class":3289},[3104,4575,4577,4580,4582,4584,4586],{"class":3106,"line":4576},99,[3104,4578,4579],{"class":3289},"                    conn = ",[3104,4581,3860],{"class":3544},[3104,4583,3009],{"class":3289},[3104,4585,4327],{"class":3411},[3104,4587,3330],{"class":3289},[3104,4589,4591,4594,4596,4599,4601,4604,4606],{"class":3106,"line":4590},100,[3104,4592,4593],{"class":3544},"                        config",[3104,4595,3009],{"class":3289},[3104,4597,4598],{"class":3411},"timeoutMs",[3104,4600,4472],{"class":3289},[3104,4602,4603],{"class":3544},"TimeUnit",[3104,4605,3009],{"class":3289},[3104,4607,4608],{"class":3544},"MILLISECONDS\n",[3104,4610,4612],{"class":3106,"line":4611},101,[3104,4613,4614],{"class":3289},"                    );\n",[3104,4616,4618,4621,4623,4625,4628,4630],{"class":3106,"line":4617},102,[3104,4619,4620],{"class":3289},"                } ",[3104,4622,4109],{"class":3420},[3104,4624,4053],{"class":3289},[3104,4626,4627],{"class":3326},"InterruptedException",[3104,4629,4117],{"class":3544},[3104,4631,3398],{"class":3289},[3104,4633,4635,4638,4640,4643,4646,4649],{"class":3106,"line":4634},103,[3104,4636,4637],{"class":3544},"                    Thread",[3104,4639,3009],{"class":3289},[3104,4641,4642],{"class":3411},"currentThread",[3104,4644,4645],{"class":3289},"().",[3104,4647,4648],{"class":3411},"interrupt",[3104,4650,4134],{"class":3289},[3104,4652,4654,4657,4659,4661,4663,4666],{"class":3106,"line":4653},104,[3104,4655,4656],{"class":3420},"                    throw",[3104,4658,3440],{"class":3420},[3104,4660,4144],{"class":3411},[3104,4662,3446],{"class":3289},[3104,4664,4665],{"class":3449},"\"Очікування з'єднання перервано\"",[3104,4667,4152],{"class":3289},[3104,4669,4671],{"class":3106,"line":4670},105,[3104,4672,4538],{"class":3289},[3104,4674,4676],{"class":3106,"line":4675},106,[3104,4677,3135],{"emptyLinePlaceholder":3134},[3104,4679,4681,4683,4685,4687],{"class":3106,"line":4680},107,[3104,4682,4403],{"class":3420},[3104,4684,4342],{"class":3289},[3104,4686,4291],{"class":3285},[3104,4688,3398],{"class":3289},[3104,4690,4692,4694,4696,4698],{"class":3106,"line":4691},108,[3104,4693,4656],{"class":3420},[3104,4695,3440],{"class":3420},[3104,4697,4144],{"class":3411},[3104,4699,3330],{"class":3289},[3104,4701,4703,4706,4708,4711,4713,4716],{"class":3106,"line":4702},109,[3104,4704,4705],{"class":3544},"                        String",[3104,4707,3009],{"class":3289},[3104,4709,4710],{"class":3411},"format",[3104,4712,3446],{"class":3289},[3104,4714,4715],{"class":3449},"\"З'єднання недоступне впродовж %d мс. \"",[3104,4717,4718],{"class":3289}," +\n",[3104,4720,4722,4725],{"class":3106,"line":4721},110,[3104,4723,4724],{"class":3449},"                            \"Пул вичерпано (%d/%d)\"",[3104,4726,3574],{"class":3289},[3104,4728,4730,4733,4735,4737],{"class":3106,"line":4729},111,[3104,4731,4732],{"class":3544},"                            config",[3104,4734,3009],{"class":3289},[3104,4736,4598],{"class":3411},[3104,4738,4739],{"class":3289},"(),\n",[3104,4741,4743,4745,4747,4749],{"class":3106,"line":4742},112,[3104,4744,4465],{"class":3544},[3104,4746,3009],{"class":3289},[3104,4748,4371],{"class":3411},[3104,4750,4739],{"class":3289},[3104,4752,4754,4756,4758,4760,4763],{"class":3106,"line":4753},113,[3104,4755,4732],{"class":3544},[3104,4757,3009],{"class":3289},[3104,4759,4028],{"class":3411},[3104,4761,4762],{"class":3289},"()), ",[3104,4764,4765],{"class":3285},"null\n",[3104,4767,4769],{"class":3106,"line":4768},114,[3104,4770,4614],{"class":3289},[3104,4772,4774],{"class":3106,"line":4773},115,[3104,4775,4538],{"class":3289},[3104,4777,4779],{"class":3106,"line":4778},116,[3104,4780,4100],{"class":3289},[3104,4782,4784],{"class":3106,"line":4783},117,[3104,4785,4158],{"class":3289},[3104,4787,4789],{"class":3106,"line":4788},118,[3104,4790,3135],{"emptyLinePlaceholder":3134},[3104,4792,4794],{"class":3106,"line":4793},119,[3104,4795,4796],{"class":3299},"        // Обгортаємо у Proxy перед видачею клієнту\n",[3104,4798,4800,4802,4804,4807,4810,4813],{"class":3106,"line":4799},120,[3104,4801,3553],{"class":3420},[3104,4803,3440],{"class":3420},[3104,4805,4806],{"class":3411}," PooledConnection",[3104,4808,4809],{"class":3289},"(conn, ",[3104,4811,4812],{"class":3285},"this",[3104,4814,3453],{"class":3289},[3104,4816,4818],{"class":3106,"line":4817},121,[3104,4819,3512],{"class":3289},[3104,4821,4823],{"class":3106,"line":4822},122,[3104,4824,3135],{"emptyLinePlaceholder":3134},[3104,4826,4828],{"class":3106,"line":4827},123,[3104,4829,3819],{"class":3299},[3104,4831,4833],{"class":3106,"line":4832},124,[3104,4834,4835],{"class":3299},"     * Повертає з'єднання до пулу.\n",[3104,4837,4839],{"class":3106,"line":4838},125,[3104,4840,4841],{"class":3299},"     * Викликається з PooledConnection.close() — не безпосередньо клієнтом.\n",[3104,4843,4845],{"class":3106,"line":4844},126,[3104,4846,3839],{"class":3299},[3104,4848,4850,4853,4856,4858,4860,4863],{"class":3106,"line":4849},127,[3104,4851,4852],{"class":3326},"    void",[3104,4854,4855],{"class":3411}," returnConnection",[3104,4857,3446],{"class":3289},[3104,4859,3854],{"class":3326},[3104,4861,4862],{"class":3544}," realConnection",[3104,4864,3398],{"class":3289},[3104,4866,4868,4870],{"class":3106,"line":4867},128,[3104,4869,3421],{"class":3420},[3104,4871,4272],{"class":3289},[3104,4873,4875],{"class":3106,"line":4874},129,[3104,4876,4877],{"class":3299},"            // Пул закрито під час використання з'єднання — закриваємо реально\n",[3104,4879,4881,4884],{"class":3106,"line":4880},130,[3104,4882,4883],{"class":3411},"            closeQuietly",[3104,4885,4886],{"class":3289},"(realConnection);\n",[3104,4888,4890,4893,4895,4897],{"class":3106,"line":4889},131,[3104,4891,4892],{"class":3544},"            totalConnections",[3104,4894,3009],{"class":3289},[3104,4896,4507],{"class":3411},[3104,4898,4134],{"class":3289},[3104,4900,4902,4905],{"class":3106,"line":4901},132,[3104,4903,4904],{"class":3420},"            return",[3104,4906,3810],{"class":3289},[3104,4908,4910],{"class":3106,"line":4909},133,[3104,4911,4158],{"class":3289},[3104,4913,4915],{"class":3106,"line":4914},134,[3104,4916,3135],{"emptyLinePlaceholder":3134},[3104,4918,4920],{"class":3106,"line":4919},135,[3104,4921,4922],{"class":3299},"        // Валідація перед поверненням: чи з'єднання ще живе?\n",[3104,4924,4926,4928,4930,4933],{"class":3106,"line":4925},136,[3104,4927,3421],{"class":3420},[3104,4929,4053],{"class":3289},[3104,4931,4932],{"class":3411},"isConnectionValid",[3104,4934,4935],{"class":3289},"(realConnection)) {\n",[3104,4937,4939,4942,4944,4947],{"class":3106,"line":4938},137,[3104,4940,4941],{"class":3544},"            availableConnections",[3104,4943,3009],{"class":3289},[3104,4945,4946],{"class":3411},"offer",[3104,4948,4886],{"class":3289},[3104,4950,4952,4954,4957],{"class":3106,"line":4951},138,[3104,4953,4106],{"class":3289},[3104,4955,4956],{"class":3420},"else",[3104,4958,3414],{"class":3289},[3104,4960,4962],{"class":3106,"line":4961},139,[3104,4963,4964],{"class":3299},"            // З'єднання \"протухло\" (BrokenPipe, timeout) — відкидаємо, лічильник зменшуємо\n",[3104,4966,4968,4970],{"class":3106,"line":4967},140,[3104,4969,4883],{"class":3411},[3104,4971,4886],{"class":3289},[3104,4973,4975,4977,4979,4981],{"class":3106,"line":4974},141,[3104,4976,4892],{"class":3544},[3104,4978,3009],{"class":3289},[3104,4980,4507],{"class":3411},[3104,4982,4134],{"class":3289},[3104,4984,4986,4989,4991,4993,4995,4998,5000,5003],{"class":3106,"line":4985},142,[3104,4987,4988],{"class":3544},"            System",[3104,4990,3009],{"class":3289},[3104,4992,4174],{"class":3544},[3104,4994,3009],{"class":3289},[3104,4996,4997],{"class":3411},"println",[3104,4999,3446],{"class":3289},[3104,5001,5002],{"class":3449},"\"[Pool] З'єднання відхилено (невалідне), видалено з пулу\"",[3104,5004,3453],{"class":3289},[3104,5006,5008],{"class":3106,"line":5007},143,[3104,5009,4158],{"class":3289},[3104,5011,5013],{"class":3106,"line":5012},144,[3104,5014,3512],{"class":3289},[3104,5016,5018],{"class":3106,"line":5017},145,[3104,5019,3135],{"emptyLinePlaceholder":3134},[3104,5021,5023],{"class":3106,"line":5022},146,[3104,5024,5025],{"class":3299},"    /** Перевіряє, чи з'єднання ще активне */\n",[3104,5027,5029,5031,5033,5036,5038,5040,5042],{"class":3106,"line":5028},147,[3104,5030,3799],{"class":3285},[3104,5032,3935],{"class":3326},[3104,5034,5035],{"class":3411}," isConnectionValid",[3104,5037,3446],{"class":3289},[3104,5039,3854],{"class":3326},[3104,5041,4318],{"class":3544},[3104,5043,3398],{"class":3289},[3104,5045,5047,5049],{"class":3106,"line":5046},148,[3104,5048,4042],{"class":3420},[3104,5050,3414],{"class":3289},[3104,5052,5054],{"class":3106,"line":5053},149,[3104,5055,5056],{"class":3299},"            // isValid(timeout) — стандартний JDBC-метод: надсилає ping до БД\n",[3104,5058,5060,5062,5065,5068,5070,5073,5076,5078,5080,5083,5085,5087],{"class":3106,"line":5059},150,[3104,5061,4904],{"class":3420},[3104,5063,5064],{"class":3289}," !",[3104,5066,5067],{"class":3544},"conn",[3104,5069,3009],{"class":3289},[3104,5071,5072],{"class":3411},"isClosed",[3104,5074,5075],{"class":3289},"() && ",[3104,5077,5067],{"class":3544},[3104,5079,3009],{"class":3289},[3104,5081,5082],{"class":3411},"isValid",[3104,5084,3446],{"class":3289},[3104,5086,3428],{"class":3427},[3104,5088,3453],{"class":3289},[3104,5090,5092,5094,5096,5098,5100,5102],{"class":3106,"line":5091},151,[3104,5093,4106],{"class":3289},[3104,5095,4109],{"class":3420},[3104,5097,4053],{"class":3289},[3104,5099,4114],{"class":3326},[3104,5101,4117],{"class":3544},[3104,5103,3398],{"class":3289},[3104,5105,5107,5109,5112],{"class":3106,"line":5106},152,[3104,5108,4904],{"class":3420},[3104,5110,5111],{"class":3285}," false",[3104,5113,3810],{"class":3289},[3104,5115,5117],{"class":3106,"line":5116},153,[3104,5118,4158],{"class":3289},[3104,5120,5122],{"class":3106,"line":5121},154,[3104,5123,3512],{"class":3289},[3104,5125,5127],{"class":3106,"line":5126},155,[3104,5128,3135],{"emptyLinePlaceholder":3134},[3104,5130,5132],{"class":3106,"line":5131},156,[3104,5133,5134],{"class":3299},"    /** Створює реальне фізичне TCP-з'єднання з БД */\n",[3104,5136,5138,5140,5142,5145,5148,5151,5154],{"class":3106,"line":5137},157,[3104,5139,3799],{"class":3285},[3104,5141,4258],{"class":3326},[3104,5143,5144],{"class":3411}," createRealConnection",[3104,5146,5147],{"class":3289},"() ",[3104,5149,5150],{"class":3285},"throws",[3104,5152,5153],{"class":3326}," SQLException",[3104,5155,3414],{"class":3289},[3104,5157,5159,5161,5163,5165,5168,5170,5173],{"class":3106,"line":5158},158,[3104,5160,4315],{"class":3326},[3104,5162,4318],{"class":3544},[3104,5164,3902],{"class":3289},[3104,5166,5167],{"class":3544},"DriverManager",[3104,5169,3009],{"class":3289},[3104,5171,5172],{"class":3411},"getConnection",[3104,5174,3330],{"class":3289},[3104,5176,5178,5180,5182,5185,5187,5189,5191,5194,5196,5198,5200,5203],{"class":3106,"line":5177},159,[3104,5179,4192],{"class":3544},[3104,5181,3009],{"class":3289},[3104,5183,5184],{"class":3411},"url",[3104,5186,4472],{"class":3289},[3104,5188,3999],{"class":3544},[3104,5190,3009],{"class":3289},[3104,5192,5193],{"class":3411},"user",[3104,5195,4472],{"class":3289},[3104,5197,3999],{"class":3544},[3104,5199,3009],{"class":3289},[3104,5201,5202],{"class":3411},"password",[3104,5204,5205],{"class":3289},"()\n",[3104,5207,5209],{"class":3106,"line":5208},160,[3104,5210,3626],{"class":3289},[3104,5212,5214,5217,5219,5222],{"class":3106,"line":5213},161,[3104,5215,5216],{"class":3544},"        totalConnections",[3104,5218,3009],{"class":3289},[3104,5220,5221],{"class":3411},"incrementAndGet",[3104,5223,4134],{"class":3289},[3104,5225,5227,5229],{"class":3106,"line":5226},162,[3104,5228,3553],{"class":3420},[3104,5230,5231],{"class":3289}," conn;\n",[3104,5233,5235],{"class":3106,"line":5234},163,[3104,5236,3512],{"class":3289},[3104,5238,5240],{"class":3106,"line":5239},164,[3104,5241,3135],{"emptyLinePlaceholder":3134},[3104,5243,5245],{"class":3106,"line":5244},165,[3104,5246,5247],{"class":3299},"    /** Закриває з'єднання без викидання виключень */\n",[3104,5249,5251,5253,5256,5259,5261,5263,5265],{"class":3106,"line":5250},166,[3104,5252,3799],{"class":3285},[3104,5254,5255],{"class":3326}," void",[3104,5257,5258],{"class":3411}," closeQuietly",[3104,5260,3446],{"class":3289},[3104,5262,3854],{"class":3326},[3104,5264,4318],{"class":3544},[3104,5266,3398],{"class":3289},[3104,5268,5270,5272,5275,5277,5279,5282,5285,5287,5289,5291,5294],{"class":3106,"line":5269},167,[3104,5271,4042],{"class":3420},[3104,5273,5274],{"class":3289}," { ",[3104,5276,5067],{"class":3544},[3104,5278,3009],{"class":3289},[3104,5280,5281],{"class":3411},"close",[3104,5283,5284],{"class":3289},"(); } ",[3104,5286,4109],{"class":3420},[3104,5288,4053],{"class":3289},[3104,5290,4114],{"class":3326},[3104,5292,5293],{"class":3544}," ignored",[3104,5295,5296],{"class":3289},") {}\n",[3104,5298,5300],{"class":3106,"line":5299},168,[3104,5301,3512],{"class":3289},[3104,5303,5305],{"class":3106,"line":5304},169,[3104,5306,3135],{"emptyLinePlaceholder":3134},[3104,5308,5310],{"class":3106,"line":5309},170,[3104,5311,5312],{"class":3299},"    /** Діагностичний метод: скільки з'єднань зараз вільні */\n",[3104,5314,5316,5318,5321,5324,5327,5330,5333,5335,5338],{"class":3106,"line":5315},171,[3104,5317,3408],{"class":3285},[3104,5319,5320],{"class":3326}," int",[3104,5322,5323],{"class":3411}," availableCount",[3104,5325,5326],{"class":3289},"() { ",[3104,5328,5329],{"class":3420},"return",[3104,5331,5332],{"class":3544}," availableConnections",[3104,5334,3009],{"class":3289},[3104,5336,5337],{"class":3411},"size",[3104,5339,5340],{"class":3289},"(); }\n",[3104,5342,5344],{"class":3106,"line":5343},172,[3104,5345,3135],{"emptyLinePlaceholder":3134},[3104,5347,5349],{"class":3106,"line":5348},173,[3104,5350,5351],{"class":3299},"    /** Діагностичний метод: загальна кількість відкритих з'єднань */\n",[3104,5353,5355,5357,5359,5362,5365,5367,5369,5371,5373],{"class":3106,"line":5354},174,[3104,5356,3408],{"class":3285},[3104,5358,5320],{"class":3326},[3104,5360,5361],{"class":3411}," totalCount",[3104,5363,5364],{"class":3289},"()     { ",[3104,5366,5329],{"class":3420},[3104,5368,3899],{"class":3544},[3104,5370,3009],{"class":3289},[3104,5372,4371],{"class":3411},[3104,5374,5340],{"class":3289},[3104,5376,5378],{"class":3106,"line":5377},175,[3104,5379,3135],{"emptyLinePlaceholder":3134},[3104,5381,5383],{"class":3106,"line":5382},176,[3104,5384,3819],{"class":3299},[3104,5386,5388],{"class":3106,"line":5387},177,[3104,5389,5390],{"class":3299},"     * Закриває пул: встановлює прапорець closed і закриває всі вільні з'єднання.\n",[3104,5392,5394],{"class":3106,"line":5393},178,[3104,5395,5396],{"class":3299},"     * З'єднання, що зараз використовуються, закриються при поверненні в пул.\n",[3104,5398,5400],{"class":3106,"line":5399},179,[3104,5401,3839],{"class":3299},[3104,5403,5405,5408],{"class":3106,"line":5404},180,[3104,5406,5407],{"class":3289},"    @",[3104,5409,5410],{"class":3326},"Override\n",[3104,5412,5414,5416,5418,5421],{"class":3106,"line":5413},181,[3104,5415,3408],{"class":3285},[3104,5417,5255],{"class":3326},[3104,5419,5420],{"class":3411}," close",[3104,5422,4264],{"class":3289},[3104,5424,5426,5429,5432],{"class":3106,"line":5425},182,[3104,5427,5428],{"class":3289},"        closed = ",[3104,5430,5431],{"class":3285},"true",[3104,5433,3810],{"class":3289},[3104,5435,5437,5440,5442,5444,5446,5449,5451,5453,5456],{"class":3106,"line":5436},183,[3104,5438,5439],{"class":3326},"        List",[3104,5441,3851],{"class":3289},[3104,5443,3854],{"class":3326},[3104,5445,3857],{"class":3289},[3104,5447,5448],{"class":3544},"toClose",[3104,5450,3902],{"class":3289},[3104,5452,3905],{"class":3420},[3104,5454,5455],{"class":3326}," ArrayList",[3104,5457,5458],{"class":3289},"\u003C>();\n",[3104,5460,5462,5465,5467,5470],{"class":3106,"line":5461},184,[3104,5463,5464],{"class":3544},"        availableConnections",[3104,5466,3009],{"class":3289},[3104,5468,5469],{"class":3411},"drainTo",[3104,5471,5472],{"class":3289},"(toClose);\n",[3104,5474,5476,5479,5481,5484,5486,5488,5491],{"class":3106,"line":5475},185,[3104,5477,5478],{"class":3544},"        toClose",[3104,5480,3009],{"class":3289},[3104,5482,5483],{"class":3411},"forEach",[3104,5485,3446],{"class":3289},[3104,5487,4812],{"class":3285},[3104,5489,5490],{"class":3420},"::",[3104,5492,5493],{"class":3289},"closeQuietly);\n",[3104,5495,5497,5499,5501,5503,5505,5507,5509,5512,5514,5516,5518,5520],{"class":3106,"line":5496},186,[3104,5498,4169],{"class":3544},[3104,5500,3009],{"class":3289},[3104,5502,4174],{"class":3544},[3104,5504,3009],{"class":3289},[3104,5506,4179],{"class":3411},[3104,5508,3446],{"class":3289},[3104,5510,5511],{"class":3449},"\"[Pool] Закрито. Закрито %d з'єднань%n\"",[3104,5513,3030],{"class":3289},[3104,5515,5448],{"class":3544},[3104,5517,3009],{"class":3289},[3104,5519,5337],{"class":3411},[3104,5521,4031],{"class":3289},[3104,5523,5525],{"class":3106,"line":5524},187,[3104,5526,3512],{"class":3289},[3104,5528,5530],{"class":3106,"line":5529},188,[3104,5531,3637],{"class":3289},[2964,5533,5534],{},[2995,5535,5536],{},"Розбір ключових рішень:",[3219,5538,5539,5551,5564,5579,5587],{},[3222,5540,5541,4053,5544,5547,5548],{},[2995,5542,5543],{},"Рядок 28",[2968,5545,5546],{},"BlockingQueue","): Потокобезпечна черга — декілька потоків можуть одночасно отримувати/повертати з'єднання без ",[2968,5549,5550],{},"synchronized",[3222,5552,5553,4053,5556,5559,5560,5563],{},[2995,5554,5555],{},"Рядок 36",[2968,5557,5558],{},"AtomicInteger","): Лічильник без блокувань — ",[2968,5561,5562],{},"compareAndSet()"," гарантує атомарне «перевірити та збільшити» без race condition",[3222,5565,5566,4053,5569,5572,5573,5576,5577],{},[2995,5567,5568],{},"Рядок 38",[2968,5570,5571],{},"volatile boolean closed","): ",[2968,5574,5575],{},"volatile"," гарантує видимість змін між потоками без ",[2968,5578,5550],{},[3222,5580,5581,4053,5584,5586],{},[2995,5582,5583],{},"Рядки 71–79",[2968,5585,4412],{},"): Паттерн оптимістичного блокування — перевіряємо і збільшуємо лічильник атомарно, уникаючи ситуації, коли два потоки одночасно вирішують «є місце — створюємо»",[3222,5588,5589,4053,5592,5595],{},[2995,5590,5591],{},"Рядок 89",[2968,5593,5594],{},"poll(timeout, unit)","): Блокуюче очікування з таймаутом — потік «засинає» до появи вільного з'єднання або закінчення часу",[3253,5597],{},[2959,5599,5601],{"id":5600},"pooledconnection-proxy-патерн-для-автоповернення","PooledConnection: Proxy-патерн для автоповернення",[2964,5603,5604,5605,5608,5609,5612,5613,5615,5616,5619,5620,5623,5624,3009],{},"Найелегантніша частина реалізації — клас ",[2968,5606,5607],{},"PooledConnection",". Це ",[2995,5610,5611],{},"Proxy"," (замісник) для реального ",[2968,5614,3854],{},": він реалізує той самий інтерфейс ",[2968,5617,5618],{},"java.sql.Connection",", але перехоплює виклик ",[2968,5621,5622],{},"close()"," і замість реального закриття ",[2995,5625,5626],{},"повертає з'єднання до пулу",[2964,5628,5629,5630,5633],{},"Завдяки цьому клієнтський код (DAO) може писати звичне ",[2968,5631,5632],{},"try-with-resources"," — і не знати нічого про існування пулу:",[3063,5635,5637],{"className":3275,"code":5636,"language":3277,"meta":3278,"style":3071},"package com.example.audiobook.db;\n\nimport java.sql.*;\nimport java.util.Map;\nimport java.util.Properties;\nimport java.util.concurrent.Executor;\n\n/**\n * Proxy-обгортка навколо реального Connection.\n * Перехоплює close() — замість закриття повертає з'єднання до пулу.\n * Реалізує повний інтерфейс Connection шляхом делегування до реального з'єднання.\n */\npublic class PooledConnection implements Connection {\n\n    /** Реальне фізичне з'єднання, що зберігається у пулі */\n    private final Connection realConnection;\n\n    /** Посилання на пул для повернення з'єднання */\n    private final SimpleConnectionPool pool;\n\n    /** Прапорець: чи вже повернуто це з'єднання до пулу */\n    private boolean returned = false;\n\n    public PooledConnection(Connection realConnection, SimpleConnectionPool pool) {\n        this.realConnection = realConnection;\n        this.pool = pool;\n    }\n\n    /**\n     * КЛЮЧОВИЙ МЕТОД: перехоплює close() і повертає з'єднання до пулу.\n     * Клієнтський код викликає close() (або try-with-resources) —\n     * реального закриття TCP-з'єднання НЕ відбувається.\n     */\n    @Override\n    public void close() throws SQLException {\n        if (returned) {\n            // Захист від подвійного повернення (idempotent close)\n            return;\n        }\n        returned = true;\n        // Скидаємо autoCommit до стандартного стану перед поверненням\n        // (клієнт міг його змінити для транзакції)\n        if (!realConnection.isClosed()) {\n            realConnection.setAutoCommit(true);\n        }\n        pool.returnConnection(realConnection);\n    }\n\n    /**\n     * isClosed() повертає true якщо з'єднання вже повернуто до пулу.\n     * Це коректна семантика: для клієнта з'єднання \"закрите\" після close().\n     */\n    @Override\n    public boolean isClosed() throws SQLException {\n        return returned || realConnection.isClosed();\n    }\n\n    // --- Делегування всіх інших методів до realConnection ---\n    // Клієнтський код використовує ці методи прозоро, не знаючи про Proxy.\n\n    @Override\n    public PreparedStatement prepareStatement(String sql) throws SQLException {\n        return realConnection.prepareStatement(sql);\n    }\n\n    @Override\n    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)\n            throws SQLException {\n        return realConnection.prepareStatement(sql, autoGeneratedKeys);\n    }\n\n    @Override\n    public Statement createStatement() throws SQLException {\n        return realConnection.createStatement();\n    }\n\n    @Override\n    public void setAutoCommit(boolean autoCommit) throws SQLException {\n        realConnection.setAutoCommit(autoCommit);\n    }\n\n    @Override\n    public boolean getAutoCommit() throws SQLException {\n        return realConnection.getAutoCommit();\n    }\n\n    @Override\n    public void commit() throws SQLException {\n        realConnection.commit();\n    }\n\n    @Override\n    public void rollback() throws SQLException {\n        realConnection.rollback();\n    }\n\n    @Override\n    public void rollback(Savepoint savepoint) throws SQLException {\n        realConnection.rollback(savepoint);\n    }\n\n    @Override\n    public Savepoint setSavepoint() throws SQLException {\n        return realConnection.setSavepoint();\n    }\n\n    @Override\n    public Savepoint setSavepoint(String name) throws SQLException {\n        return realConnection.setSavepoint(name);\n    }\n\n    @Override\n    public DatabaseMetaData getMetaData() throws SQLException {\n        return realConnection.getMetaData();\n    }\n\n    @Override\n    public void setTransactionIsolation(int level) throws SQLException {\n        realConnection.setTransactionIsolation(level);\n    }\n\n    @Override\n    public int getTransactionIsolation() throws SQLException {\n        return realConnection.getTransactionIsolation();\n    }\n\n    // Решта методів Connection делегуються аналогічно...\n    // (скорочено для читабельності — повну реалізацію IDE генерує автоматично)\n\n    @Override public String nativeSQL(String sql) throws SQLException { return realConnection.nativeSQL(sql); }\n    @Override public void setReadOnly(boolean ro) throws SQLException { realConnection.setReadOnly(ro); }\n    @Override public boolean isReadOnly() throws SQLException { return realConnection.isReadOnly(); }\n    @Override public void setCatalog(String c) throws SQLException { realConnection.setCatalog(c); }\n    @Override public String getCatalog() throws SQLException { return realConnection.getCatalog(); }\n    @Override public SQLWarning getWarnings() throws SQLException { return realConnection.getWarnings(); }\n    @Override public void clearWarnings() throws SQLException { realConnection.clearWarnings(); }\n    @Override public Map\u003CString,Class\u003C?>> getTypeMap() throws SQLException { return realConnection.getTypeMap(); }\n    @Override public void setTypeMap(Map\u003CString,Class\u003C?>> m) throws SQLException { realConnection.setTypeMap(m); }\n    @Override public void setHoldability(int h) throws SQLException { realConnection.setHoldability(h); }\n    @Override public int getHoldability() throws SQLException { return realConnection.getHoldability(); }\n    @Override public CallableStatement prepareCall(String s) throws SQLException { return realConnection.prepareCall(s); }\n    @Override public CallableStatement prepareCall(String s,int a,int b) throws SQLException { return realConnection.prepareCall(s,a,b); }\n    @Override public CallableStatement prepareCall(String s,int a,int b,int c) throws SQLException { return realConnection.prepareCall(s,a,b,c); }\n    @Override public PreparedStatement prepareStatement(String s,int a,int b) throws SQLException { return realConnection.prepareStatement(s,a,b); }\n    @Override public PreparedStatement prepareStatement(String s,int a,int b,int c) throws SQLException { return realConnection.prepareStatement(s,a,b,c); }\n    @Override public PreparedStatement prepareStatement(String s,int[] c) throws SQLException { return realConnection.prepareStatement(s,c); }\n    @Override public PreparedStatement prepareStatement(String s,String[] c) throws SQLException { return realConnection.prepareStatement(s,c); }\n    @Override public Clob createClob() throws SQLException { return realConnection.createClob(); }\n    @Override public Blob createBlob() throws SQLException { return realConnection.createBlob(); }\n    @Override public NClob createNClob() throws SQLException { return realConnection.createNClob(); }\n    @Override public SQLXML createSQLXML() throws SQLException { return realConnection.createSQLXML(); }\n    @Override public boolean isValid(int t) throws SQLException { return realConnection.isValid(t); }\n    @Override public void setClientInfo(String n,String v) throws SQLClientInfoException { realConnection.setClientInfo(n,v); }\n    @Override public void setClientInfo(Properties p) throws SQLClientInfoException { realConnection.setClientInfo(p); }\n    @Override public String getClientInfo(String n) throws SQLException { return realConnection.getClientInfo(n); }\n    @Override public Properties getClientInfo() throws SQLException { return realConnection.getClientInfo(); }\n    @Override public Array createArrayOf(String t,Object[] e) throws SQLException { return realConnection.createArrayOf(t,e); }\n    @Override public Struct createStruct(String t,Object[] a) throws SQLException { return realConnection.createStruct(t,a); }\n    @Override public void setSchema(String s) throws SQLException { realConnection.setSchema(s); }\n    @Override public String getSchema() throws SQLException { return realConnection.getSchema(); }\n    @Override public void abort(Executor e) throws SQLException { realConnection.abort(e); }\n    @Override public void setNetworkTimeout(Executor e,int ms) throws SQLException { realConnection.setNetworkTimeout(e,ms); }\n    @Override public int getNetworkTimeout() throws SQLException { return realConnection.getNetworkTimeout(); }\n    @Override public Statement createStatement(int rt,int rc) throws SQLException { return realConnection.createStatement(rt,rc); }\n    @Override public Statement createStatement(int rt,int rc,int rh) throws SQLException { return realConnection.createStatement(rt,rc,rh); }\n    @Override public \u003CT> T unwrap(Class\u003CT> i) throws SQLException { return realConnection.unwrap(i); }\n    @Override public boolean isWrapperFor(Class\u003C?> i) throws SQLException { return realConnection.isWrapperFor(i); }\n}\n",[2968,5638,5639,5645,5649,5656,5663,5670,5677,5681,5685,5690,5695,5700,5704,5718,5722,5727,5739,5743,5748,5761,5765,5770,5785,5789,5810,5822,5834,5838,5842,5846,5851,5856,5861,5865,5871,5887,5894,5899,5905,5909,5918,5923,5928,5943,5959,5963,5975,5979,5983,5987,5992,5997,6001,6007,6024,6039,6043,6047,6052,6057,6061,6067,6093,6107,6111,6115,6121,6144,6153,6166,6170,6174,6180,6198,6211,6215,6219,6225,6250,6262,6266,6270,6276,6293,6306,6310,6314,6320,6337,6348,6352,6356,6362,6379,6390,6394,6398,6404,6428,6439,6443,6447,6453,6471,6484,6488,6492,6498,6521,6534,6538,6542,6548,6566,6579,6583,6587,6593,6617,6629,6633,6637,6643,6660,6673,6677,6681,6686,6691,6695,6737,6775,6807,6845,6877,6910,6940,6990,7043,7081,7113,7154,7205,7260,7308,7362,7409,7453,7486,7519,7552,7585,7624,7670,7707,7746,7777,7827,7876,7912,7944,7982,8026,8058,8103,8153,8207,8251],{"__ignoreMap":3071},[3104,5640,5641,5643],{"class":3106,"line":3107},[3104,5642,3286],{"class":3285},[3104,5644,3290],{"class":3289},[3104,5646,5647],{"class":3106,"line":3113},[3104,5648,3135],{"emptyLinePlaceholder":3134},[3104,5650,5651,5653],{"class":3106,"line":3119},[3104,5652,3661],{"class":3285},[3104,5654,5655],{"class":3289}," java.sql.*;\n",[3104,5657,5658,5660],{"class":3106,"line":3125},[3104,5659,3661],{"class":3285},[3104,5661,5662],{"class":3289}," java.util.Map;\n",[3104,5664,5665,5667],{"class":3106,"line":3131},[3104,5666,3661],{"class":3285},[3104,5668,5669],{"class":3289}," java.util.Properties;\n",[3104,5671,5672,5674],{"class":3106,"line":3138},[3104,5673,3661],{"class":3285},[3104,5675,5676],{"class":3289}," java.util.concurrent.Executor;\n",[3104,5678,5679],{"class":3106,"line":3144},[3104,5680,3135],{"emptyLinePlaceholder":3134},[3104,5682,5683],{"class":3106,"line":3150},[3104,5684,3300],{"class":3299},[3104,5686,5687],{"class":3106,"line":3156},[3104,5688,5689],{"class":3299}," * Proxy-обгортка навколо реального Connection.\n",[3104,5691,5692],{"class":3106,"line":3161},[3104,5693,5694],{"class":3299}," * Перехоплює close() — замість закриття повертає з'єднання до пулу.\n",[3104,5696,5697],{"class":3106,"line":3167},[3104,5698,5699],{"class":3299}," * Реалізує повний інтерфейс Connection шляхом делегування до реального з'єднання.\n",[3104,5701,5702],{"class":3106,"line":3173},[3104,5703,3315],{"class":3299},[3104,5705,5706,5708,5710,5712,5714,5716],{"class":3106,"line":3179},[3104,5707,3320],{"class":3285},[3104,5709,3779],{"class":3285},[3104,5711,4806],{"class":3326},[3104,5713,3785],{"class":3285},[3104,5715,4258],{"class":3326},[3104,5717,3414],{"class":3289},[3104,5719,5720],{"class":3106,"line":3185},[3104,5721,3135],{"emptyLinePlaceholder":3134},[3104,5723,5724],{"class":3106,"line":3191},[3104,5725,5726],{"class":3299},"    /** Реальне фізичне з'єднання, що зберігається у пулі */\n",[3104,5728,5729,5731,5733,5735,5737],{"class":3106,"line":3196},[3104,5730,3799],{"class":3285},[3104,5732,3802],{"class":3285},[3104,5734,4258],{"class":3326},[3104,5736,4862],{"class":3544},[3104,5738,3810],{"class":3289},[3104,5740,5741],{"class":3106,"line":3417},[3104,5742,3135],{"emptyLinePlaceholder":3134},[3104,5744,5745],{"class":3106,"line":3434},[3104,5746,5747],{"class":3299},"    /** Посилання на пул для повернення з'єднання */\n",[3104,5749,5750,5752,5754,5756,5759],{"class":3106,"line":3456},[3104,5751,3799],{"class":3285},[3104,5753,3802],{"class":3285},[3104,5755,3782],{"class":3326},[3104,5757,5758],{"class":3544}," pool",[3104,5760,3810],{"class":3289},[3104,5762,5763],{"class":3106,"line":3464},[3104,5764,3135],{"emptyLinePlaceholder":3134},[3104,5766,5767],{"class":3106,"line":3480},[3104,5768,5769],{"class":3299},"    /** Прапорець: чи вже повернуто це з'єднання до пулу */\n",[3104,5771,5772,5774,5776,5779,5781,5783],{"class":3106,"line":3493},[3104,5773,3799],{"class":3285},[3104,5775,3935],{"class":3326},[3104,5777,5778],{"class":3544}," returned",[3104,5780,3902],{"class":3289},[3104,5782,3943],{"class":3285},[3104,5784,3810],{"class":3289},[3104,5786,5787],{"class":3106,"line":3509},[3104,5788,3135],{"emptyLinePlaceholder":3134},[3104,5790,5791,5793,5795,5797,5799,5801,5803,5806,5808],{"class":3106,"line":3515},[3104,5792,3408],{"class":3285},[3104,5794,4806],{"class":3411},[3104,5796,3446],{"class":3289},[3104,5798,3854],{"class":3326},[3104,5800,4862],{"class":3544},[3104,5802,3030],{"class":3289},[3104,5804,5805],{"class":3326},"SimpleConnectionPool",[3104,5807,5758],{"class":3544},[3104,5809,3398],{"class":3289},[3104,5811,5812,5814,5816,5819],{"class":3106,"line":3520},[3104,5813,3994],{"class":3285},[3104,5815,3009],{"class":3289},[3104,5817,5818],{"class":3544},"realConnection",[3104,5820,5821],{"class":3289}," = realConnection;\n",[3104,5823,5824,5826,5828,5831],{"class":3106,"line":3526},[3104,5825,3994],{"class":3285},[3104,5827,3009],{"class":3289},[3104,5829,5830],{"class":3544},"pool",[3104,5832,5833],{"class":3289}," = pool;\n",[3104,5835,5836],{"class":3106,"line":3550},[3104,5837,3512],{"class":3289},[3104,5839,5840],{"class":3106,"line":3562},[3104,5841,3135],{"emptyLinePlaceholder":3134},[3104,5843,5844],{"class":3106,"line":3577},[3104,5845,3819],{"class":3299},[3104,5847,5848],{"class":3106,"line":3590},[3104,5849,5850],{"class":3299},"     * КЛЮЧОВИЙ МЕТОД: перехоплює close() і повертає з'єднання до пулу.\n",[3104,5852,5853],{"class":3106,"line":3602},[3104,5854,5855],{"class":3299},"     * Клієнтський код викликає close() (або try-with-resources) —\n",[3104,5857,5858],{"class":3106,"line":3614},[3104,5859,5860],{"class":3299},"     * реального закриття TCP-з'єднання НЕ відбувається.\n",[3104,5862,5863],{"class":3106,"line":3623},[3104,5864,3839],{"class":3299},[3104,5866,5867,5869],{"class":3106,"line":3629},[3104,5868,5407],{"class":3289},[3104,5870,5410],{"class":3326},[3104,5872,5873,5875,5877,5879,5881,5883,5885],{"class":3106,"line":3634},[3104,5874,3408],{"class":3285},[3104,5876,5255],{"class":3326},[3104,5878,5420],{"class":3411},[3104,5880,5147],{"class":3289},[3104,5882,5150],{"class":3285},[3104,5884,5153],{"class":3326},[3104,5886,3414],{"class":3289},[3104,5888,5889,5891],{"class":3106,"line":3878},[3104,5890,3421],{"class":3420},[3104,5892,5893],{"class":3289}," (returned) {\n",[3104,5895,5896],{"class":3106,"line":3884},[3104,5897,5898],{"class":3299},"            // Захист від подвійного повернення (idempotent close)\n",[3104,5900,5901,5903],{"class":3106,"line":3889},[3104,5902,4904],{"class":3420},[3104,5904,3810],{"class":3289},[3104,5906,5907],{"class":3106,"line":3916},[3104,5908,4158],{"class":3289},[3104,5910,5911,5914,5916],{"class":3106,"line":3921},[3104,5912,5913],{"class":3289},"        returned = ",[3104,5915,5431],{"class":3285},[3104,5917,3810],{"class":3289},[3104,5919,5920],{"class":3106,"line":3927},[3104,5921,5922],{"class":3299},"        // Скидаємо autoCommit до стандартного стану перед поверненням\n",[3104,5924,5925],{"class":3106,"line":3948},[3104,5926,5927],{"class":3299},"        // (клієнт міг його змінити для транзакції)\n",[3104,5929,5930,5932,5935,5937,5939,5941],{"class":3106,"line":3953},[3104,5931,3421],{"class":3420},[3104,5933,5934],{"class":3289}," (!",[3104,5936,5818],{"class":3544},[3104,5938,3009],{"class":3289},[3104,5940,5072],{"class":3411},[3104,5942,4391],{"class":3289},[3104,5944,5945,5948,5950,5953,5955,5957],{"class":3106,"line":3958},[3104,5946,5947],{"class":3544},"            realConnection",[3104,5949,3009],{"class":3289},[3104,5951,5952],{"class":3411},"setAutoCommit",[3104,5954,3446],{"class":3289},[3104,5956,5431],{"class":3285},[3104,5958,3453],{"class":3289},[3104,5960,5961],{"class":3106,"line":3964},[3104,5962,4158],{"class":3289},[3104,5964,5965,5968,5970,5973],{"class":3106,"line":3970},[3104,5966,5967],{"class":3544},"        pool",[3104,5969,3009],{"class":3289},[3104,5971,5972],{"class":3411},"returnConnection",[3104,5974,4886],{"class":3289},[3104,5976,5977],{"class":3106,"line":3975},[3104,5978,3512],{"class":3289},[3104,5980,5981],{"class":3106,"line":3991},[3104,5982,3135],{"emptyLinePlaceholder":3134},[3104,5984,5985],{"class":3106,"line":4005},[3104,5986,3819],{"class":3299},[3104,5988,5989],{"class":3106,"line":4034},[3104,5990,5991],{"class":3299},"     * isClosed() повертає true якщо з'єднання вже повернуто до пулу.\n",[3104,5993,5994],{"class":3106,"line":4039},[3104,5995,5996],{"class":3299},"     * Це коректна семантика: для клієнта з'єднання \"закрите\" після close().\n",[3104,5998,5999],{"class":3106,"line":4047},[3104,6000,3839],{"class":3299},[3104,6002,6003,6005],{"class":3106,"line":4079},[3104,6004,5407],{"class":3289},[3104,6006,5410],{"class":3326},[3104,6008,6009,6011,6013,6016,6018,6020,6022],{"class":3106,"line":4097},[3104,6010,3408],{"class":3285},[3104,6012,3935],{"class":3326},[3104,6014,6015],{"class":3411}," isClosed",[3104,6017,5147],{"class":3289},[3104,6019,5150],{"class":3285},[3104,6021,5153],{"class":3326},[3104,6023,3414],{"class":3289},[3104,6025,6026,6028,6031,6033,6035,6037],{"class":3106,"line":4103},[3104,6027,3553],{"class":3420},[3104,6029,6030],{"class":3289}," returned || ",[3104,6032,5818],{"class":3544},[3104,6034,3009],{"class":3289},[3104,6036,5072],{"class":3411},[3104,6038,4134],{"class":3289},[3104,6040,6041],{"class":3106,"line":4122},[3104,6042,3512],{"class":3289},[3104,6044,6045],{"class":3106,"line":4128},[3104,6046,3135],{"emptyLinePlaceholder":3134},[3104,6048,6049],{"class":3106,"line":4137},[3104,6050,6051],{"class":3299},"    // --- Делегування всіх інших методів до realConnection ---\n",[3104,6053,6054],{"class":3106,"line":4155},[3104,6055,6056],{"class":3299},"    // Клієнтський код використовує ці методи прозоро, не знаючи про Proxy.\n",[3104,6058,6059],{"class":3106,"line":4161},[3104,6060,3135],{"emptyLinePlaceholder":3134},[3104,6062,6063,6065],{"class":3106,"line":4166},[3104,6064,5407],{"class":3289},[3104,6066,5410],{"class":3326},[3104,6068,6069,6071,6074,6077,6079,6081,6084,6087,6089,6091],{"class":3106,"line":4189},[3104,6070,3408],{"class":3285},[3104,6072,6073],{"class":3326}," PreparedStatement",[3104,6075,6076],{"class":3411}," prepareStatement",[3104,6078,3446],{"class":3289},[3104,6080,3541],{"class":3326},[3104,6082,6083],{"class":3544}," sql",[3104,6085,6086],{"class":3289},") 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autoGeneratedKeys",[3104,6143,3431],{"class":3289},[3104,6145,6146,6149,6151],{"class":3106,"line":4228},[3104,6147,6148],{"class":3285},"            throws",[3104,6150,5153],{"class":3326},[3104,6152,3414],{"class":3289},[3104,6154,6155,6157,6159,6161,6163],{"class":3106,"line":4234},[3104,6156,3553],{"class":3420},[3104,6158,4862],{"class":3544},[3104,6160,3009],{"class":3289},[3104,6162,6103],{"class":3411},[3104,6164,6165],{"class":3289},"(sql, autoGeneratedKeys);\n",[3104,6167,6168],{"class":3106,"line":4248},[3104,6169,3512],{"class":3289},[3104,6171,6172],{"class":3106,"line":4253},[3104,6173,3135],{"emptyLinePlaceholder":3134},[3104,6175,6176,6178],{"class":3106,"line":4267},[3104,6177,5407],{"class":3289},[3104,6179,5410],{"class":3326},[3104,6181,6182,6184,6187,6190,6192,6194,6196],{"class":3106,"line":4275},[3104,6183,3408],{"class":3285},[3104,6185,6186],{"class":3326}," Statement",[3104,6188,6189],{"class":3411}," createStatement",[3104,6191,5147],{"class":3289},[3104,6193,5150],{"class":3285},[3104,6195,5153],{"class":3326},[3104,6197,3414],{"class":3289},[3104,6199,6200,6202,6204,6206,6209],{"class":3106,"line":4296},[3104,6201,3553],{"class":3420},[3104,6203,4862],{"class":3544},[3104,6205,3009],{"class":3289},[3104,6207,6208],{"class":3411},"createStatement",[3104,6210,4134],{"class":3289},[3104,6212,6213],{"class":3106,"line":4301},[3104,6214,3512],{"class":3289},[3104,6216,6217],{"class":3106,"line":4306},[3104,6218,3135],{"emptyLinePlaceholder":3134},[3104,6220,6221,6223],{"class":3106,"line":4312},[3104,6222,5407],{"class":3289},[3104,6224,5410],{"class":3326},[3104,6226,6227,6229,6231,6234,6236,6239,6242,6244,6246,6248],{"class":3106,"line":4332},[3104,6228,3408],{"class":3285},[3104,6230,5255],{"class":3326},[3104,6232,6233],{"class":3411}," setAutoCommit",[3104,6235,3446],{"class":3289},[3104,6237,6238],{"class":3326},"boolean",[3104,6240,6241],{"class":3544}," autoCommit",[3104,6243,6086],{"class":3289},[3104,6245,5150],{"class":3285},[3104,6247,5153],{"class":3326},[3104,6249,3414],{"class":3289},[3104,6251,6252,6255,6257,6259],{"class":3106,"line":4337},[3104,6253,6254],{"class":3544},"        realConnection",[3104,6256,3009],{"class":3289},[3104,6258,5952],{"class":3411},[3104,6260,6261],{"class":3289},"(autoCommit);\n",[3104,6263,6264],{"class":3106,"line":4349},[3104,6265,3512],{"class":3289},[3104,6267,6268],{"class":3106,"line":4355},[3104,6269,3135],{"emptyLinePlaceholder":3134},[3104,6271,6272,6274],{"class":3106,"line":4376},[3104,6273,5407],{"class":3289},[3104,6275,5410],{"class":3326},[3104,6277,6278,6280,6282,6285,6287,6289,6291],{"class":3106,"line":4394},[3104,6279,3408],{"class":3285},[3104,6281,3935],{"class":3326},[3104,6283,6284],{"class":3411}," getAutoCommit",[3104,6286,5147],{"class":3289},[3104,6288,5150],{"class":3285},[3104,6290,5153],{"class":3326},[3104,6292,3414],{"class":3289},[3104,6294,6295,6297,6299,6301,6304],{"class":3106,"line":4400},[3104,6296,3553],{"class":3420},[3104,6298,4862],{"class":3544},[3104,6300,3009],{"class":3289},[3104,6302,6303],{"class":3411},"getAutoCommit",[3104,6305,4134],{"class":3289},[3104,6307,6308],{"class":3106,"line":4423},[3104,6309,3512],{"class":3289},[3104,6311,6312],{"class":3106,"line":4431},[3104,6313,3135],{"emptyLinePlaceholder":3134},[3104,6315,6316,6318],{"class":3106,"line":4441},[3104,6317,5407],{"class":3289},[3104,6319,5410],{"class":3326},[3104,6321,6322,6324,6326,6329,6331,6333,6335],{"class":3106,"line":4462},[3104,6323,3408],{"class":3285},[3104,6325,5255],{"class":3326},[3104,6327,6328],{"class":3411}," commit",[3104,6330,5147],{"class":3289},[3104,6332,5150],{"class":3285},[3104,6334,5153],{"class":3326},[3104,6336,3414],{"class":3289},[3104,6338,6339,6341,6343,6346],{"class":3106,"line":4483},[3104,6340,6254],{"class":3544},[3104,6342,3009],{"class":3289},[3104,6344,6345],{"class":3411},"commit",[3104,6347,4134],{"class":3289},[3104,6349,6350],{"class":3106,"line":4499},[3104,6351,3512],{"class":3289},[3104,6353,6354],{"class":3106,"line":4512},[3104,6355,3135],{"emptyLinePlaceholder":3134},[3104,6357,6358,6360],{"class":3106,"line":4529},[3104,6359,5407],{"class":3289},[3104,6361,5410],{"class":3326},[3104,6363,6364,6366,6368,6371,6373,6375,6377],{"class":3106,"line":4535},[3104,6365,3408],{"class":3285},[3104,6367,5255],{"class":3326},[3104,6369,6370],{"class":3411}," rollback",[3104,6372,5147],{"class":3289},[3104,6374,5150],{"class":3285},[3104,6376,5153],{"class":3326},[3104,6378,3414],{"class":3289},[3104,6380,6381,6383,6385,6388],{"class":3106,"line":4541},[3104,6382,6254],{"class":3544},[3104,6384,3009],{"class":3289},[3104,6386,6387],{"class":3411},"rollback",[3104,6389,4134],{"class":3289},[3104,6391,6392],{"class":3106,"line":4546},[3104,6393,3512],{"class":3289},[3104,6395,6396],{"class":3106,"line":4551},[3104,6397,3135],{"emptyLinePlaceholder":3134},[3104,6399,6400,6402],{"class":3106,"line":4562},[3104,6401,5407],{"class":3289},[3104,6403,5410],{"class":3326},[3104,6405,6406,6408,6410,6412,6414,6417,6420,6422,6424,6426],{"class":3106,"line":4568},[3104,6407,3408],{"class":3285},[3104,6409,5255],{"class":3326},[3104,6411,6370],{"class":3411},[3104,6413,3446],{"class":3289},[3104,6415,6416],{"class":3326},"Savepoint",[3104,6418,6419],{"class":3544}," savepoint",[3104,6421,6086],{"class":3289},[3104,6423,5150],{"class":3285},[3104,6425,5153],{"class":3326},[3104,6427,3414],{"class":3289},[3104,6429,6430,6432,6434,6436],{"class":3106,"line":4576},[3104,6431,6254],{"class":3544},[3104,6433,3009],{"class":3289},[3104,6435,6387],{"class":3411},[3104,6437,6438],{"class":3289},"(savepoint);\n",[3104,6440,6441],{"class":3106,"line":4590},[3104,6442,3512],{"class":3289},[3104,6444,6445],{"class":3106,"line":4611},[3104,6446,3135],{"emptyLinePlaceholder":3134},[3104,6448,6449,6451],{"class":3106,"line":4617},[3104,6450,5407],{"class":3289},[3104,6452,5410],{"class":3326},[3104,6454,6455,6457,6460,6463,6465,6467,6469],{"class":3106,"line":4634},[3104,6456,3408],{"class":3285},[3104,6458,6459],{"class":3326}," Savepoint",[3104,6461,6462],{"class":3411}," setSavepoint",[3104,6464,5147],{"class":3289},[3104,6466,5150],{"class":3285},[3104,6468,5153],{"class":3326},[3104,6470,3414],{"class":3289},[3104,6472,6473,6475,6477,6479,6482],{"class":3106,"line":4653},[3104,6474,3553],{"class":3420},[3104,6476,4862],{"class":3544},[3104,6478,3009],{"class":3289},[3104,6480,6481],{"class":3411},"setSavepoint",[3104,6483,4134],{"class":3289},[3104,6485,6486],{"class":3106,"line":4670},[3104,6487,3512],{"class":3289},[3104,6489,6490],{"class":3106,"line":4675},[3104,6491,3135],{"emptyLinePlaceholder":3134},[3104,6493,6494,6496],{"class":3106,"line":4680},[3104,6495,5407],{"class":3289},[3104,6497,5410],{"class":3326},[3104,6499,6500,6502,6504,6506,6508,6510,6513,6515,6517,6519],{"class":3106,"line":4691},[3104,6501,3408],{"class":3285},[3104,6503,6459],{"class":3326},[3104,6505,6462],{"class":3411},[3104,6507,3446],{"class":3289},[3104,6509,3541],{"class":3326},[3104,6511,6512],{"class":3544}," 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rt",[3104,8078,6957],{"class":3289},[3104,8080,4056],{"class":3326},[3104,8082,8083],{"class":3544}," rc",[3104,8085,6086],{"class":3289},[3104,8087,5150],{"class":3285},[3104,8089,5153],{"class":3326},[3104,8091,5274],{"class":3289},[3104,8093,5329],{"class":3420},[3104,8095,4862],{"class":3544},[3104,8097,3009],{"class":3289},[3104,8099,6208],{"class":3411},[3104,8101,8102],{"class":3289},"(rt,rc); }\n",[3104,8104,8105,8107,8109,8111,8113,8115,8117,8119,8121,8123,8125,8127,8129,8131,8134,8136,8138,8140,8142,8144,8146,8148,8150],{"class":3106,"line":5244},[3104,8106,5407],{"class":3289},[3104,8108,6701],{"class":3326},[3104,8110,6704],{"class":3285},[3104,8112,6186],{"class":3326},[3104,8114,6189],{"class":3411},[3104,8116,3446],{"class":3289},[3104,8118,4056],{"class":3326},[3104,8120,8076],{"class":3544},[3104,8122,6957],{"class":3289},[3104,8124,4056],{"class":3326},[3104,8126,8083],{"class":3544},[3104,8128,6957],{"class":3289},[3104,8130,4056],{"class":3326},[3104,8132,8133],{"class":3544}," rh",[3104,8135,6086],{"class":3289},[3104,8137,5150],{"class":3285},[3104,8139,5153],{"class":3326},[3104,8141,5274],{"class":3289},[3104,8143,5329],{"class":3420},[3104,8145,4862],{"class":3544},[3104,8147,3009],{"class":3289},[3104,8149,6208],{"class":3411},[3104,8151,8152],{"class":3289},"(rt,rc,rh); }\n",[3104,8154,8155,8157,8159,8161,8164,8167,8169,8171,8174,8176,8178,8180,8182,8184,8187,8189,8191,8193,8195,8197,8199,8201,8204],{"class":3106,"line":5250},[3104,8156,5407],{"class":3289},[3104,8158,6701],{"class":3326},[3104,8160,6704],{"class":3285},[3104,8162,8163],{"class":3289}," \u003C",[3104,8165,8166],{"class":3326},"T",[3104,8168,3857],{"class":3289},[3104,8170,8166],{"class":3326},[3104,8172,8173],{"class":3411}," unwrap",[3104,8175,3446],{"class":3289},[3104,8177,6960],{"class":3326},[3104,8179,3851],{"class":3289},[3104,8181,8166],{"class":3326},[3104,8183,3857],{"class":3289},[3104,8185,8186],{"class":3544},"i",[3104,8188,6086],{"class":3289},[3104,8190,5150],{"class":3285},[3104,8192,5153],{"class":3326},[3104,8194,5274],{"class":3289},[3104,8196,5329],{"class":3420},[3104,8198,4862],{"class":3544},[3104,8200,3009],{"class":3289},[3104,8202,8203],{"class":3411},"unwrap",[3104,8205,8206],{"class":3289},"(i); }\n",[3104,8208,8209,8211,8213,8215,8217,8220,8222,8224,8226,8228,8230,8232,8234,8236,8238,8240,8242,8244,8246,8249],{"class":3106,"line":5269},[3104,8210,5407],{"class":3289},[3104,8212,6701],{"class":3326},[3104,8214,6704],{"class":3285},[3104,8216,3935],{"class":3326},[3104,8218,8219],{"class":3411}," isWrapperFor",[3104,8221,3446],{"class":3289},[3104,8223,6960],{"class":3326},[3104,8225,3851],{"class":3289},[3104,8227,6965],{"class":3285},[3104,8229,3857],{"class":3289},[3104,8231,8186],{"class":3544},[3104,8233,6086],{"class":3289},[3104,8235,5150],{"class":3285},[3104,8237,5153],{"class":3326},[3104,8239,5274],{"class":3289},[3104,8241,5329],{"class":3420},[3104,8243,4862],{"class":3544},[3104,8245,3009],{"class":3289},[3104,8247,8248],{"class":3411},"isWrapperFor",[3104,8250,8206],{"class":3289},[3104,8252,8253],{"class":3106,"line":5299},[3104,8254,3637],{"class":3289},[8256,8257,8258,8260,8261,8264,8265,8267,8268,8270,8271,8274],"note",{},[2968,8259,5607],{}," реалізує ",[2995,8262,8263],{},"всі"," методи інтерфейсу ",[2968,8266,3854],{}," через делегування — це стандартна техніка Proxy-патерну. IDE (IntelliJ IDEA, Eclipse) генерує ці методи автоматично через «Implement Methods» → «Delegate to field». Критично важливим є лише ",[2968,8269,5622],{}," та ",[2968,8272,8273],{},"isClosed()"," — решта є механічним делегуванням.",[3253,8276],{},[2959,8278,8280],{"id":8279},"оновлений-connectionmanager","Оновлений ConnectionManager",[2964,8282,8283,8284,8286,8287,2982],{},"Тепер ",[2968,8285,2970],{}," делегує до ",[2968,8288,5805],{},[3063,8290,8292],{"className":3275,"code":8291,"language":3277,"meta":3278,"style":3071},"package com.example.audiobook.db;\n\nimport java.sql.Connection;\n\n/**\n * Фасад для отримання з'єднань.\n * Абстрагує клієнтський код від деталей реалізації пулу.\n */\npublic class ConnectionManager implements AutoCloseable {\n\n    private final SimpleConnectionPool pool;\n\n    public ConnectionManager(PoolConfig config) {\n        this.pool = new SimpleConnectionPool(config);\n    }\n\n    /** Статичний фабричний метод для H2 */\n    public static ConnectionManager forH2(String dbPath) {\n        return new ConnectionManager(PoolConfig.forH2(dbPath));\n    }\n\n    /**\n     * Повертає з'єднання з пулу.\n     * Клієнтський код зобов'язаний викликати close() (через try-with-resources).\n     * Реального закриття TCP не відбудеться — з'єднання повернеться до пулу.\n     */\n    public Connection getConnection() {\n        return pool.getConnection();\n    }\n\n    /** Діагностика: вільних / всього з'єднань */\n    public String poolStats() {\n        return String.format(\"Pool: %d available / %d total / %d max\",\n            pool.availableCount(), pool.totalCount(), pool.config().maxConnections());\n    }\n\n    @Override\n    public void close() {\n        pool.close();\n    }\n}\n",[2968,8293,8294,8300,8304,8310,8314,8318,8323,8328,8332,8347,8351,8363,8367,8381,8398,8402,8406,8411,8429,8449,8453,8457,8461,8466,8471,8476,8480,8490,8502,8506,8510,8515,8526,8543,8576,8580,8584,8590,8600,8610,8614],{"__ignoreMap":3071},[3104,8295,8296,8298],{"class":3106,"line":3107},[3104,8297,3286],{"class":3285},[3104,8299,3290],{"class":3289},[3104,8301,8302],{"class":3106,"line":3113},[3104,8303,3135],{"emptyLinePlaceholder":3134},[3104,8305,8306,8308],{"class":3106,"line":3119},[3104,8307,3661],{"class":3285},[3104,8309,3664],{"class":3289},[3104,8311,8312],{"class":3106,"line":3125},[3104,8313,3135],{"emptyLinePlaceholder":3134},[3104,8315,8316],{"class":3106,"line":3131},[3104,8317,3300],{"class":3299},[3104,8319,8320],{"class":3106,"line":3138},[3104,8321,8322],{"class":3299}," * Фасад для отримання з'єднань.\n",[3104,8324,8325],{"class":3106,"line":3144},[3104,8326,8327],{"class":3299}," * Абстрагує клієнтський код від деталей реалізації пулу.\n",[3104,8329,8330],{"class":3106,"line":3150},[3104,8331,3315],{"class":3299},[3104,8333,8334,8336,8338,8341,8343,8345],{"class":3106,"line":3156},[3104,8335,3320],{"class":3285},[3104,8337,3779],{"class":3285},[3104,8339,8340],{"class":3326}," ConnectionManager",[3104,8342,3785],{"class":3285},[3104,8344,3788],{"class":3326},[3104,8346,3414],{"class":3289},[3104,8348,8349],{"class":3106,"line":3161},[3104,8350,3135],{"emptyLinePlaceholder":3134},[3104,8352,8353,8355,8357,8359,8361],{"class":3106,"line":3167},[3104,8354,3799],{"class":3285},[3104,8356,3802],{"class":3285},[3104,8358,3782],{"class":3326},[3104,8360,5758],{"class":3544},[3104,8362,3810],{"class":3289},[3104,8364,8365],{"class":3106,"line":3173},[3104,8366,3135],{"emptyLinePlaceholder":3134},[3104,8368,8369,8371,8373,8375,8377,8379],{"class":3106,"line":3179},[3104,8370,3408],{"class":3285},[3104,8372,8340],{"class":3411},[3104,8374,3446],{"class":3289},[3104,8376,3984],{"class":3326},[3104,8378,3807],{"class":3544},[3104,8380,3398],{"class":3289},[3104,8382,8383,8385,8387,8389,8391,8393,8395],{"class":3106,"line":3185},[3104,8384,3994],{"class":3285},[3104,8386,3009],{"class":3289},[3104,8388,5830],{"class":3544},[3104,8390,3902],{"class":3289},[3104,8392,3905],{"class":3420},[3104,8394,3782],{"class":3411},[3104,8396,8397],{"class":3289},"(config);\n",[3104,8399,8400],{"class":3106,"line":3191},[3104,8401,3512],{"class":3289},[3104,8403,8404],{"class":3106,"line":3196},[3104,8405,3135],{"emptyLinePlaceholder":3134},[3104,8407,8408],{"class":3106,"line":3417},[3104,8409,8410],{"class":3299},"    /** Статичний фабричний метод для H2 */\n",[3104,8412,8413,8415,8417,8419,8421,8423,8425,8427],{"class":3106,"line":3434},[3104,8414,3408],{"class":3285},[3104,8416,3531],{"class":3285},[3104,8418,8340],{"class":3326},[3104,8420,3536],{"class":3411},[3104,8422,3446],{"class":3289},[3104,8424,3541],{"class":3326},[3104,8426,3545],{"class":3544},[3104,8428,3398],{"class":3289},[3104,8430,8431,8433,8435,8437,8439,8441,8443,8446],{"class":3106,"line":3456},[3104,8432,3553],{"class":3420},[3104,8434,3440],{"class":3420},[3104,8436,8340],{"class":3411},[3104,8438,3446],{"class":3289},[3104,8440,3984],{"class":3544},[3104,8442,3009],{"class":3289},[3104,8444,8445],{"class":3411},"forH2",[3104,8447,8448],{"class":3289},"(dbPath));\n",[3104,8450,8451],{"class":3106,"line":3464},[3104,8452,3512],{"class":3289},[3104,8454,8455],{"class":3106,"line":3480},[3104,8456,3135],{"emptyLinePlaceholder":3134},[3104,8458,8459],{"class":3106,"line":3493},[3104,8460,3819],{"class":3299},[3104,8462,8463],{"class":3106,"line":3509},[3104,8464,8465],{"class":3299},"     * Повертає з'єднання з пулу.\n",[3104,8467,8468],{"class":3106,"line":3515},[3104,8469,8470],{"class":3299},"     * Клієнтський код зобов'язаний викликати close() (через try-with-resources).\n",[3104,8472,8473],{"class":3106,"line":3520},[3104,8474,8475],{"class":3299},"     * Реального закриття TCP не відбудеться — з'єднання повернеться до пулу.\n",[3104,8477,8478],{"class":3106,"line":3526},[3104,8479,3839],{"class":3299},[3104,8481,8482,8484,8486,8488],{"class":3106,"line":3550},[3104,8483,3408],{"class":3285},[3104,8485,4258],{"class":3326},[3104,8487,4261],{"class":3411},[3104,8489,4264],{"class":3289},[3104,8491,8492,8494,8496,8498,8500],{"class":3106,"line":3562},[3104,8493,3553],{"class":3420},[3104,8495,5758],{"class":3544},[3104,8497,3009],{"class":3289},[3104,8499,5172],{"class":3411},[3104,8501,4134],{"class":3289},[3104,8503,8504],{"class":3106,"line":3577},[3104,8505,3512],{"class":3289},[3104,8507,8508],{"class":3106,"line":3590},[3104,8509,3135],{"emptyLinePlaceholder":3134},[3104,8511,8512],{"class":3106,"line":3602},[3104,8513,8514],{"class":3299},"    /** Діагностика: вільних / всього з'єднань */\n",[3104,8516,8517,8519,8521,8524],{"class":3106,"line":3614},[3104,8518,3408],{"class":3285},[3104,8520,6707],{"class":3326},[3104,8522,8523],{"class":3411}," poolStats",[3104,8525,4264],{"class":3289},[3104,8527,8528,8530,8532,8534,8536,8538,8541],{"class":3106,"line":3623},[3104,8529,3553],{"class":3420},[3104,8531,6707],{"class":3544},[3104,8533,3009],{"class":3289},[3104,8535,4710],{"class":3411},[3104,8537,3446],{"class":3289},[3104,8539,8540],{"class":3449},"\"Pool: %d available / %d total / %d max\"",[3104,8542,3574],{"class":3289},[3104,8544,8545,8548,8550,8553,8555,8557,8559,8562,8564,8566,8568,8570,8572,8574],{"class":3106,"line":3629},[3104,8546,8547],{"class":3544},"            pool",[3104,8549,3009],{"class":3289},[3104,8551,8552],{"class":3411},"availableCount",[3104,8554,4472],{"class":3289},[3104,8556,5830],{"class":3544},[3104,8558,3009],{"class":3289},[3104,8560,8561],{"class":3411},"totalCount",[3104,8563,4472],{"class":3289},[3104,8565,5830],{"class":3544},[3104,8567,3009],{"class":3289},[3104,8569,3999],{"class":3411},[3104,8571,4645],{"class":3289},[3104,8573,4028],{"class":3411},[3104,8575,4031],{"class":3289},[3104,8577,8578],{"class":3106,"line":3634},[3104,8579,3512],{"class":3289},[3104,8581,8582],{"class":3106,"line":3878},[3104,8583,3135],{"emptyLinePlaceholder":3134},[3104,8585,8586,8588],{"class":3106,"line":3884},[3104,8587,5407],{"class":3289},[3104,8589,5410],{"class":3326},[3104,8591,8592,8594,8596,8598],{"class":3106,"line":3889},[3104,8593,3408],{"class":3285},[3104,8595,5255],{"class":3326},[3104,8597,5420],{"class":3411},[3104,8599,4264],{"class":3289},[3104,8601,8602,8604,8606,8608],{"class":3106,"line":3916},[3104,8603,5967],{"class":3544},[3104,8605,3009],{"class":3289},[3104,8607,5281],{"class":3411},[3104,8609,4134],{"class":3289},[3104,8611,8612],{"class":3106,"line":3921},[3104,8613,3512],{"class":3289},[3104,8615,8616],{"class":3106,"line":3927},[3104,8617,3637],{"class":3289},[2964,8619,8620,8623,8624,8626],{},[2995,8621,8622],{},"Клієнтський код (AuthorDao) не змінюється жодним чином"," — ",[2968,8625,5632],{}," тепер повертає з'єднання до пулу замість закриття:",[3063,8628,8630],{"className":3275,"code":8629,"language":3277,"meta":3278,"style":3071},"// AuthorDao.findAll() — код ідентичний до попередньої статті\npublic List\u003CAuthor> findAll() {\n    try (Connection conn = connectionManager.getConnection(); // ← бере з пулу\n         PreparedStatement stmt = conn.prepareStatement(sql);\n         ResultSet rs = stmt.executeQuery()) {\n\n        // ... маппінг ...\n\n    } // ← conn.close() → PooledConnection.close() → повернення до пулу!\n    // Реального TCP-закриття не відбувається\n}\n",[2968,8631,8632,8637,8652,8678,8696,8716,8720,8725,8729,8737,8742],{"__ignoreMap":3071},[3104,8633,8634],{"class":3106,"line":3107},[3104,8635,8636],{"class":3299},"// AuthorDao.findAll() — код ідентичний до попередньої статті\n",[3104,8638,8639,8641,8644,8647,8650],{"class":3106,"line":3113},[3104,8640,3320],{"class":3285},[3104,8642,8643],{"class":3326}," List",[3104,8645,8646],{"class":3289},"\u003CAuthor> ",[3104,8648,8649],{"class":3411},"findAll",[3104,8651,4264],{"class":3289},[3104,8653,8654,8657,8659,8661,8663,8665,8668,8670,8672,8675],{"class":3106,"line":3119},[3104,8655,8656],{"class":3420},"    try",[3104,8658,4053],{"class":3289},[3104,8660,3854],{"class":3326},[3104,8662,4318],{"class":3544},[3104,8664,3902],{"class":3289},[3104,8666,8667],{"class":3544},"connectionManager",[3104,8669,3009],{"class":3289},[3104,8671,5172],{"class":3411},[3104,8673,8674],{"class":3289},"(); ",[3104,8676,8677],{"class":3299},"// ← бере з пулу\n",[3104,8679,8680,8683,8686,8688,8690,8692,8694],{"class":3106,"line":3125},[3104,8681,8682],{"class":3326},"         PreparedStatement",[3104,8684,8685],{"class":3544}," stmt",[3104,8687,3902],{"class":3289},[3104,8689,5067],{"class":3544},[3104,8691,3009],{"class":3289},[3104,8693,6103],{"class":3411},[3104,8695,6106],{"class":3289},[3104,8697,8698,8701,8704,8706,8709,8711,8714],{"class":3106,"line":3131},[3104,8699,8700],{"class":3326},"         ResultSet",[3104,8702,8703],{"class":3544}," rs",[3104,8705,3902],{"class":3289},[3104,8707,8708],{"class":3544},"stmt",[3104,8710,3009],{"class":3289},[3104,8712,8713],{"class":3411},"executeQuery",[3104,8715,4391],{"class":3289},[3104,8717,8718],{"class":3106,"line":3138},[3104,8719,3135],{"emptyLinePlaceholder":3134},[3104,8721,8722],{"class":3106,"line":3144},[3104,8723,8724],{"class":3299},"        // ... маппінг ...\n",[3104,8726,8727],{"class":3106,"line":3150},[3104,8728,3135],{"emptyLinePlaceholder":3134},[3104,8730,8731,8734],{"class":3106,"line":3156},[3104,8732,8733],{"class":3289},"    } ",[3104,8735,8736],{"class":3299},"// ← conn.close() → PooledConnection.close() → повернення до пулу!\n",[3104,8738,8739],{"class":3106,"line":3161},[3104,8740,8741],{"class":3299},"    // Реального TCP-закриття не відбувається\n",[3104,8743,8744],{"class":3106,"line":3167},[3104,8745,3637],{"class":3289},[3253,8747],{},[2959,8749,8751],{"id":8750},"демонстрація-та-порівняння-продуктивності","Демонстрація та порівняння продуктивності",[3063,8753,8755],{"className":3275,"code":8754,"language":3277,"meta":3278,"style":3071},"public class Main {\n    public static void main(String[] args) throws Exception {\n        ConnectionManager cm = ConnectionManager.forH2(\"./data/audiobook_db\");\n        AuthorDao dao = new AuthorDao(cm);\n\n        // Виконуємо 50 запитів і вимірюємо час\n        int n = 50;\n\n        long start = System.currentTimeMillis();\n        for (int i = 0; i \u003C n; i++) {\n            dao.findAll();\n        }\n        long elapsed = System.currentTimeMillis() - start;\n\n        System.out.printf(\"✓ %d запитів виконано за %d мс%n\", n, elapsed);\n        System.out.println(\"✓ \" + cm.poolStats());\n\n        cm.close(); // Закрити пул — закриває реальні TCP-з'єднання\n    }\n}\n",[2968,8756,8757,8768,8797,8820,8838,8842,8847,8861,8865,8885,8903,8914,8918,8936,8940,8960,8990,8994,9008,9012],{"__ignoreMap":3071},[3104,8758,8759,8761,8763,8766],{"class":3106,"line":3107},[3104,8760,3320],{"class":3285},[3104,8762,3779],{"class":3285},[3104,8764,8765],{"class":3326}," Main",[3104,8767,3414],{"class":3289},[3104,8769,8770,8772,8774,8776,8779,8781,8783,8785,8788,8790,8792,8795],{"class":3106,"line":3113},[3104,8771,3408],{"class":3285},[3104,8773,3531],{"class":3285},[3104,8775,5255],{"class":3326},[3104,8777,8778],{"class":3411}," main",[3104,8780,3446],{"class":3289},[3104,8782,3541],{"class":3326},[3104,8784,7386],{"class":3289},[3104,8786,8787],{"class":3544},"args",[3104,8789,6086],{"class":3289},[3104,8791,5150],{"class":3285},[3104,8793,8794],{"class":3326}," Exception",[3104,8796,3414],{"class":3289},[3104,8798,8799,8802,8805,8807,8809,8811,8813,8815,8818],{"class":3106,"line":3119},[3104,8800,8801],{"class":3326},"        ConnectionManager",[3104,8803,8804],{"class":3544}," cm",[3104,8806,3902],{"class":3289},[3104,8808,2970],{"class":3544},[3104,8810,3009],{"class":3289},[3104,8812,8445],{"class":3411},[3104,8814,3446],{"class":3289},[3104,8816,8817],{"class":3449},"\"./data/audiobook_db\"",[3104,8819,3453],{"class":3289},[3104,8821,8822,8825,8828,8830,8832,8835],{"class":3106,"line":3125},[3104,8823,8824],{"class":3326},"        AuthorDao",[3104,8826,8827],{"class":3544}," dao",[3104,8829,3902],{"class":3289},[3104,8831,3905],{"class":3420},[3104,8833,8834],{"class":3411}," AuthorDao",[3104,8836,8837],{"class":3289},"(cm);\n",[3104,8839,8840],{"class":3106,"line":3131},[3104,8841,3135],{"emptyLinePlaceholder":3134},[3104,8843,8844],{"class":3106,"line":3138},[3104,8845,8846],{"class":3299},"        // Виконуємо 50 запитів і вимірюємо час\n",[3104,8848,8849,8852,8854,8856,8859],{"class":3106,"line":3144},[3104,8850,8851],{"class":3326},"        int",[3104,8853,7643],{"class":3544},[3104,8855,3902],{"class":3289},[3104,8857,8858],{"class":3427},"50",[3104,8860,3810],{"class":3289},[3104,8862,8863],{"class":3106,"line":3150},[3104,8864,3135],{"emptyLinePlaceholder":3134},[3104,8866,8867,8870,8873,8875,8878,8880,8883],{"class":3106,"line":3156},[3104,8868,8869],{"class":3326},"        long",[3104,8871,8872],{"class":3544}," start",[3104,8874,3902],{"class":3289},[3104,8876,8877],{"class":3544},"System",[3104,8879,3009],{"class":3289},[3104,8881,8882],{"class":3411},"currentTimeMillis",[3104,8884,4134],{"class":3289},[3104,8886,8887,8890,8892,8894,8896,8898,8900],{"class":3106,"line":3161},[3104,8888,8889],{"class":3420},"        for",[3104,8891,4053],{"class":3289},[3104,8893,4056],{"class":3326},[3104,8895,4059],{"class":3544},[3104,8897,3902],{"class":3289},[3104,8899,3488],{"class":3427},[3104,8901,8902],{"class":3289},"; i \u003C n; i++) {\n",[3104,8904,8905,8908,8910,8912],{"class":3106,"line":3167},[3104,8906,8907],{"class":3544},"            dao",[3104,8909,3009],{"class":3289},[3104,8911,8649],{"class":3411},[3104,8913,4134],{"class":3289},[3104,8915,8916],{"class":3106,"line":3173},[3104,8917,4158],{"class":3289},[3104,8919,8920,8922,8925,8927,8929,8931,8933],{"class":3106,"line":3179},[3104,8921,8869],{"class":3326},[3104,8923,8924],{"class":3544}," elapsed",[3104,8926,3902],{"class":3289},[3104,8928,8877],{"class":3544},[3104,8930,3009],{"class":3289},[3104,8932,8882],{"class":3411},[3104,8934,8935],{"class":3289},"() - start;\n",[3104,8937,8938],{"class":3106,"line":3185},[3104,8939,3135],{"emptyLinePlaceholder":3134},[3104,8941,8942,8944,8946,8948,8950,8952,8954,8957],{"class":3106,"line":3191},[3104,8943,4169],{"class":3544},[3104,8945,3009],{"class":3289},[3104,8947,4174],{"class":3544},[3104,8949,3009],{"class":3289},[3104,8951,4179],{"class":3411},[3104,8953,3446],{"class":3289},[3104,8955,8956],{"class":3449},"\"✓ %d запитів виконано за %d мс%n\"",[3104,8958,8959],{"class":3289},", n, elapsed);\n",[3104,8961,8962,8964,8966,8968,8970,8972,8974,8977,8980,8983,8985,8988],{"class":3106,"line":3196},[3104,8963,4169],{"class":3544},[3104,8965,3009],{"class":3289},[3104,8967,4174],{"class":3544},[3104,8969,3009],{"class":3289},[3104,8971,4997],{"class":3411},[3104,8973,3446],{"class":3289},[3104,8975,8976],{"class":3449},"\"✓ \"",[3104,8978,8979],{"class":3289}," + ",[3104,8981,8982],{"class":3544},"cm",[3104,8984,3009],{"class":3289},[3104,8986,8987],{"class":3411},"poolStats",[3104,8989,4031],{"class":3289},[3104,8991,8992],{"class":3106,"line":3417},[3104,8993,3135],{"emptyLinePlaceholder":3134},[3104,8995,8996,8999,9001,9003,9005],{"class":3106,"line":3434},[3104,8997,8998],{"class":3544},"        cm",[3104,9000,3009],{"class":3289},[3104,9002,5281],{"class":3411},[3104,9004,8674],{"class":3289},[3104,9006,9007],{"class":3299},"// Закрити пул — закриває реальні TCP-з'єднання\n",[3104,9009,9010],{"class":3106,"line":3456},[3104,9011,3512],{"class":3289},[3104,9013,9014],{"class":3106,"line":3464},[3104,9015,3637],{"class":3289},[3063,9017,9020],{"className":9018,"code":9019,"language":3068},[3066],"[Pool] Ініціалізовано: 2 з'єднань готові\n✓ 50 запитів виконано за 12 мс\n✓ Pool: 2 available / 2 total / 10 max\n[Pool] Закрито. Закрито 2 з'єднань\n",[2968,9021,9019],{"__ignoreMap":3071},[2964,9023,9024,9025,3009],{},"Без пулу 50 запитів × ~100 мс = ~5000 мс. З пулом — 12 мс. Різниця у ",[2995,9026,9027],{},"400 разів",[3253,9029],{},[2959,9031,9033],{"id":9032},"що-не-вміє-наша-реалізація-чесне-порівняння-з-hikaricp","Що не вміє наша реалізація: чесне порівняння з HikariCP",[3211,9035,9036,9066],{},[3214,9037,9040],{"icon":9038,"title":9039},"i-heroicons-wrench-screwdriver","Наша реалізація",[3219,9041,9042,9045,9048,9051,9054,9057,9060,9063],{},[3222,9043,9044],{},"✅ Object Pool з min/max з'єднань",[3222,9046,9047],{},"✅ BlockingQueue + таймаут очікування",[3222,9049,9050],{},"✅ Proxy-обгортка для автоповернення",[3222,9052,9053],{},"✅ Валідація з'єднання перед поверненням",[3222,9055,9056],{},"❌ Немає виявлення витоків (leaked connection detection)",[3222,9058,9059],{},"❌ Немає метрик (Micrometer, JMX)",[3222,9061,9062],{},"❌ Немає Statement кешування",[3222,9064,9065],{},"❌ Немає автоматичного відновлення після збою БД",[3214,9067,9070],{"icon":9068,"title":9069},"i-heroicons-rocket-launch","HikariCP (production)",[3219,9071,9072,9075,9078,9081,9084,9087,9090],{},[3222,9073,9074],{},"✅ Все вище",[3222,9076,9077],{},"✅ Leak detection з трасуванням стеку",[3222,9079,9080],{},"✅ Statement cache (PreparedStatement reuse)",[3222,9082,9083],{},"✅ Автоматичний keepalive та reconnect",[3222,9085,9086],{},"✅ Детальні метрики через Micrometer",[3222,9088,9089],{},"✅ Налаштований під мінімальні затримки",[3222,9091,9092],{},"✅ Активно підтримується та тестується",[3253,9094],{},[2959,9096,9098],{"id":9097},"підсумок","Підсумок",[2964,9100,9101],{},"Ми реалізували Connection Pool з нуля, застосувавши три патерни одночасно:",[3219,9103,9104,9109,9117],{},[3222,9105,9106,9108],{},[2995,9107,3084],{}," — збереження дорогих об'єктів для повторного використання",[3222,9110,9111,9113,9114,9116],{},[2995,9112,5611],{}," — перехоплення ",[2968,9115,5622],{}," для повернення до пулу",[3222,9118,9119,9122,9123,9125],{},[2995,9120,9121],{},"Template Method"," — єдиний алгоритм в ",[2968,9124,2974],{}," з варіативними кроками",[2964,9127,9128,9129,9131],{},"Тепер наш ",[2968,9130,2970],{}," є повноцінним шаром управління ресурсами. Решта коду — DAO, Repository, Unit of Work — використовує його прозоро.",[3253,9133],{},[2959,9135,9137],{"id":9136},"завдання","Завдання",[9139,9140,9142,9152,9166],"collapsible",{"title":9141},"Рівень 1: Діагностика пулу",[2964,9143,9144,9145,9147,9148,9151],{},"Додайте до ",[2968,9146,5805],{}," метод ",[2968,9149,9150],{},"printStats()",", що виводить:",[3219,9153,9154,9157,9160,9163],{},[3222,9155,9156],{},"Кількість вільних з'єднань",[3222,9158,9159],{},"Кількість зайнятих (total - available)",[3222,9161,9162],{},"Максимум",[3222,9164,9165],{},"Відсоток завантаженості",[2964,9167,9168,9169,9172,9173,3009],{},"Викличте його після кожного ",[2968,9170,9171],{},"findAll()"," у демонстраційному ",[2968,9174,9175],{},"Main",[9139,9177,9179,9180,8270,9183,9186,9187,9189,9190,9193],{"title":9178},"Рівень 2: Timeout і перевірка навантаження","Встановіть ",[2968,9181,9182],{},"maxConnections = 2",[2968,9184,9185],{},"timeoutMs = 100",". Напишіть тест, що одночасно запускає 5 потоків, кожен з яких виконує ",[2968,9188,9171],{}," і затримується на 500 мс (імітація повільного запиту). Переконайтеся, що 3 потоки отримують ",[2968,9191,9192],{},"DatabaseException"," з повідомленням про вичерпання пулу.",[9139,9195,9144,9197,9199,9200,9203,9204,9206,9207,9209],{"title":9196},"Рівень 3: Автоматичне відновлення",[2968,9198,5805],{}," механізм відновлення: якщо ",[2968,9201,9202],{},"returnConnection()"," відхиляє невалідне з'єднання і ",[2968,9205,4366],{}," падає нижче ",[2968,9208,4073],{}," — автоматично створіть нове з'єднання, щоб підтримати мінімальний рівень пулу. Цей механізм важливий для систем, де БД може тимчасово обривати з'єднання.",[9211,9212,9213],"style",{},"html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .su1O8, html code.shiki .su1O8{--shiki-light:#0000FF;--shiki-default:#569CD6;--shiki-dark:#569CD6}html pre.shiki code .sHH4Y, html code.shiki .sHH4Y{--shiki-light:#000000;--shiki-default:#D4D4D4;--shiki-dark:#D4D4D4}html pre.shiki code .spJ8K, html code.shiki .spJ8K{--shiki-light:#008000;--shiki-default:#6A9955;--shiki-dark:#6A9955}html pre.shiki code .sN1BT, html code.shiki .sN1BT{--shiki-light:#267F99;--shiki-default:#4EC9B0;--shiki-dark:#4EC9B0}html pre.shiki code .s8Opu, html code.shiki .s8Opu{--shiki-light:#795E26;--shiki-default:#DCDCAA;--shiki-dark:#DCDCAA}html pre.shiki code .sCDza, html code.shiki .sCDza{--shiki-light:#AF00DB;--shiki-default:#CE92A4;--shiki-dark:#CE92A4}html pre.shiki code .sJj4R, html code.shiki .sJj4R{--shiki-light:#098658;--shiki-default:#B5CEA8;--shiki-dark:#B5CEA8}html pre.shiki code .sbdoH, html code.shiki .sbdoH{--shiki-light:#A31515;--shiki-default:#CE9178;--shiki-dark:#CE9178}html pre.shiki code .siwwj, html code.shiki .siwwj{--shiki-light:#001080;--shiki-default:#9CDCFE;--shiki-dark:#9CDCFE}",{"title":3071,"searchDepth":3113,"depth":3113,"links":9215},[9216,9223,9224,9228,9229,9230,9231,9232,9233],{"id":2961,"depth":3113,"text":2962,"children":9217},[9218,9219,9220,9221,9222],{"id":2989,"depth":3119,"text":2990},{"id":3001,"depth":3119,"text":3002},{"id":3012,"depth":3119,"text":3013},{"id":3022,"depth":3119,"text":3023},{"id":3037,"depth":3119,"text":3038},{"id":3077,"depth":3113,"text":3078},{"id":3257,"depth":3113,"text":3258,"children":9225},[9226,9227],{"id":3268,"depth":3119,"text":3269},{"id":3640,"depth":3119,"text":3641},{"id":5600,"depth":3113,"text":5601},{"id":8279,"depth":3113,"text":8280},{"id":8750,"depth":3113,"text":8751},{"id":9032,"depth":3113,"text":9033},{"id":9097,"depth":3113,"text":9098},{"id":9136,"depth":3113,"text":9137},"Чому створення Connection — дорога операція, як влаштований патерн Object Pool, реалізація власного пулу з'єднань з нуля через BlockingQueue та Proxy-обгортку, і чим наша реалізація відрізняється від HikariCP.","md",null,{},{"title":2293,"description":9234},"BeMrMsU-gQq08bYL7lOWGIQZa3NAU1sWoRbUvKitAD0",[9241,9243],{"title":2289,"path":2290,"stem":2291,"description":9242,"children":-1},"Автоматизований контроль форматування та статичний аналіз у Java-проєкті: налаштування Google Java Style для IntelliJ IDEA, Spotless для Gradle та Maven, SpotBugs та SonarQube для виявлення дефектів.",{"title":2297,"path":2298,"stem":2299,"description":9244,"children":-1},"Перший патерн Фаулера для роботи з JDBC: інкапсуляція окремого рядка таблиці в об'єкт-шлюз, реалізація для авторів і жанрів аудіоплатформи, порівняння з наївним DAO та аналіз обмежень підходу.",1777909225798]