Uygulama başlamadan önce veya uygulama kapanırken çalıştırılması gereken event handler’ları (fonksiyonları) tanımlayabilirsiniz.

Bu fonksiyonlar `async def` ile veya normal `def` ile tanımlanabilir.

### `startup` eventi { #startup-event }

Uygulama başlamadan önce çalıştırılacak bir fonksiyon eklemek için, `"startup"` event’i ile tanımlayın:

        queryContext = new QueryContext("   ", false);
        assertEquals("*", queryContext.getQueryString());
        assertNull(queryContext.getDefaultField());
    }

    // Test constructor with normal query string
    @Test
    public void test_constructor_normalQueryString() {
        queryContext = new QueryContext("test query", false);
        assertEquals("test query", queryContext.getQueryString());

            mockedCrypto.when(Crypto::getMD5).thenReturn(mockMd5);
        }
    }

    @Test
    void testConstructorWithNormalKey() throws NoSuchAlgorithmException {
        // Test constructor with a normal length key
        try (MockedStatic<Crypto> mockedCrypto = mockStatic(Crypto.class)) {
            mockedCrypto.when(Crypto::getMD5).thenReturn(mockMd5);
            HMACT64 hmac = new HMACT64(TEST_KEY);

        String result = viewHelper.removeHighlightTag(text);
        assertEquals("highlighted text", result);

        text = "normal text";
        result = viewHelper.removeHighlightTag(text);
        assertEquals("normal text", result);

        text = "";
        result = viewHelper.removeHighlightTag(text);
        assertEquals("", result);
    }

   * href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/concurrent/locks/Condition.html#implementation-considerations-heading">spurious
   * wakeup</a>. This means that resulting wait is not "uninterruptible" in the normal sense of
   * {@link Uninterruptibles}. Still, this method allows callers to write <a
   * href="https://errorprone.info/bugpattern/WaitNotInLoop">the standard, required loop for waiting on a {@code

Ten en cuenta que el servidor (Uvicorn) no usará ese `root_path` para nada, a excepción de pasárselo a la app.

Pero si vas con tu navegador a [http://127.0.0.1:8000/app](http://127.0.0.1:8000/app) verás el response normal:

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}
```

Así que no se esperará que sea accedido en `http://127.0.0.1:8000/api/v1/app`.

        assertThrows(ClassCastException.class, () -> smbTree.unwrap(CustomSmbTree.class),
                "Should throw ClassCastException when type is incompatible");
    }

    /**
     * Test for close() method under normal conditions.
     * Verifies that close can be called successfully.
     */
    @Test
    void testClose() {
        doNothing().when(smbTree).close();

        smbTree.close();

    int exponent = getExponent(x);
    if (!isNormal(x)) {
      return log2(x * IMPLICIT_BIT, mode) - SIGNIFICAND_BITS;
      // Do the calculation on a normal value.
    }
    // x is positive, finite, and normal
    boolean increment;
    switch (mode) {
      case UNNECESSARY:
        checkRoundingUnnecessary(isPowerOfTwo(x));
      // fall through
      case FLOOR:

    * Önce router dependency’leri, sonra decorator’daki [`dependencies`](dependencies/dependencies-in-path-operation-decorators.md), sonra da normal parametre dependency’leri çalışır.
    * Ayrıca [`scopes` ile `Security` dependency’leri](../advanced/security/oauth2-scopes.md) de ekleyebilirsiniz.

/// tip | İpucu

This was changed in FastAPI 0.106.0 with the intention to not hold resources while waiting for the response to travel through the network.

/// tip

Additionally, a background task is normally an independent set of logic that should be handled separately, with its own resources (e.g. its own database connection).

So, this way you will probably have cleaner code.

///