### Внедрение зависимостей

FastAPI включает в себя чрезвычайно простую в использовании, но чрезвычайно мощную систему <abbr title='известную как: "components", "resources", "services", "providers"'><strong>Внедрения зависимостей</strong></abbr>.

* Даже зависимости могут иметь зависимости, создавая иерархию или **"графы" зависимостей**.

  It is possible that this will cause problems with some third-party components
  that improperly depended on those rules. If this affects you, you can run
  `kubelet` with `--feature-gates=IPTablesOwnershipCleanup=false`, but a bug should also be filed against the third-party component. ([#114472](https://github.com/kubernetes/kubernetes/pull/114472), [@danwinship](https://github.com/danwinship))

    * Esta extensão SNI permite que um único servidor (com um **único endereço IP**) tenha **vários certificados HTTPS** e atenda a **vários domínios / aplicativos HTTPS**.
    * Para que isso funcione, um **único** componente (programa) em execução no servidor, ouvindo no **endereço IP público**, deve ter **todos os certificados HTTPS** no servidor.
* **Depois** de obter uma conexão segura, o protocolo de comunicação **ainda é HTTP**.

    PULL_REQUEST_FEEDBACK("Pull Request Feedback", "Run various functional tests", "PullRequestFeedback"),
    READY_FOR_NIGHTLY(
        "Ready for Nightly",
        "Rerun tests in different environments / 3rd party components",
        "ReadyforNightly",
    ),
    READY_FOR_RELEASE("Ready for Release", "Once a day: Rerun tests in more environments", "ReadyforRelease"),
    WEEKLY_VALIDATION(
        "Weekly Validation",

    * This SNI extension allows one single server (with a **single IP address**) to have **several HTTPS certificates** and serve **multiple HTTPS domains/applications**.
    * For this to work, a **single** component (program) running on the server, listening on the **public IP address**, must have **all the HTTPS certificates** in the server.
* **After** obtaining a secure connection, the communication protocol is **still HTTP**.

    A --> C[Persistent Handles]
    C --> D[Multi-Channel]
    D --> E[RDMA Support]
    C --> F[Witness Protocol]
    D --> F
```

## Testing Strategy

### Unit Tests
- Individual component testing for each feature
- Mock-based testing for protocol interactions
- State machine validation

### Integration Tests
- Feature interaction testing
- Network failure simulation
- Performance benchmarking

- kubeadm: all master components are now exclusively relying on the `PriorityClassName` pod spec for annotating them as cluster critical components. Since `scheduler.alpha.kubernetes.io/critical-pod` annotation is no longer supported by Kubernetes 1.14 this annotation is no longer added to master components. ([#73857](https://github.com/kubernetes/kubernetes/pull/73857), [@ereslibre](https://github.com/ereslibre))...

* Як встановити **перевірку обмежень** як `maximum_length` або `regex`.
* Дуже потужна і проста у використанні система **<abbr title="також відома як: components, resources, providers, services, injectables">Ін'єкція Залежностей</abbr>**.
* Безпека та автентифікація, включаючи підтримку **OAuth2** з **JWT tokens** та **HTTP Basic** автентифікацію.

     */
    @Test
    public void testOverallPerformanceRegression() throws Exception {
        System.out.println("=== Critical Performance Fixes Validation ===");

        // Test multiple components together
        long start = System.nanoTime();

        // 1. Connection Pool Test
        SmbTransportPoolImpl pool = new SmbTransportPoolImpl();
        pool.setMaxPoolSize(50);

### Dependency injection

FastAPI'ın inanılmaz derecede kullanımı kolay, fakat inanılmaz derecede güçlü <abbr title='"components", "resources", "services", "providers" olarak da bilinen'><strong>Dependency Injection </strong></abbr> sistemi var.

* Dependencylerin bile dependencies'i olabiliyor, FastAPI bunun  için **graph of "dependency"** yaratıyor.