time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
	dm.Unlock(t.Context())

	dm.Lock(id, source)
	time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
	dm.Unlock(t.Context())

	dm.Lock(id, source)
	time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
	dm.Unlock(t.Context())

	dm.Lock(id, source)
	time.Sleep(time.Duration(10+(rand.Float32()*50)) * time.Millisecond)
	dm.Unlock(t.Context())

                }
                Thread.sleep(50);
            }
            assertEquals(CrawlerStatus.RUNNING, crawler1.crawlerContext.getStatus());
            for (int i = 0; i < 100; i++) {
                if (crawler2.crawlerContext.getStatus() == CrawlerStatus.RUNNING) {
                    break;
                }
                Thread.sleep(50);
            }

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[9] *}

Notice that the default value is still `None`, so the parameter is still optional.

But now, having `Query(max_length=50)` inside of `Annotated`, we are telling FastAPI that we want it to have **additional validation** for this value, we want it to have maximum 50 characters. 😎

/// tip

    void testSizeWithOutputData() {
        setupMockConfig();
        Smb2IoctlRequest request = new Smb2IoctlRequest(mockConfig, TEST_CONTROL_CODE);
        when(mockOutputData.size()).thenReturn(50);
        request.setOutputData(mockOutputData);

        int size = request.size();

        // Base size 120 + 50 = 170, aligned to 8 = 176
        assertEquals(176, size);

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[9] *}

Beachten Sie, dass der Defaultwert weiterhin `None` ist, so dass der Parameter weiterhin optional ist.

Aber jetzt, mit `Query(max_length=50)` innerhalb von `Annotated`, sagen wir FastAPI, dass wir eine **zusätzliche Validierung** für diesen Wert wünschen, wir wollen, dass er maximal 50 Zeichen hat. 😎

/// tip | Tipp

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[9] *}

Perceba que o valor padrão continua sendo `None`, então o parâmetro ainda é opcional.

Mas agora, com `Query(max_length=50)` dentro de `Annotated`, estamos dizendo ao FastAPI que queremos **validação adicional** para este valor, queremos que tenha no máximo 50 caracteres. 😎

/// tip | Dica

        final long start = System.nanoTime();
        controller.delayAfterProcessing();
        final long elapsed = (System.nanoTime() - start) / 1000000;

        assertTrue("No delay expected", elapsed < 50); // Should be nearly instant
    }

    /**
     * Test delayAfterProcessing with actual delay
     */
    public void test_delayAfterProcessing_withDelay() {

	// Multiple HTTP request handlers updating stats concurrently,
	// while background processes are reading the stats for persistence.
	const numWriters = 100 // Simulate many HTTP request handlers.
	const numReaders = 50  // Simulate background stats readers.
	const opsPerGoroutine = 100

	var wg sync.WaitGroup
	for i := range numWriters {
		wg.Add(1)
		go func(writerID int) {
			defer wg.Done()

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[9] *}

Зверніть увагу, що значення за замовчуванням усе ще `None`, тому параметр залишається необов'язковим.

Але тепер, додавши `Query(max_length=50)` всередину `Annotated`, ми повідомляємо FastAPI, що хочемо **додаткову валідацію** для цього значення — воно має містити максимум 50 символів. 😎

/// tip | Підказка

        // dialectIndex
        buffer[bufferIndex++] = 5;
        buffer[bufferIndex++] = 0;
        // securityMode
        buffer[bufferIndex++] = 0x03;
        // maxMpxCount
        buffer[bufferIndex++] = 50;
        buffer[bufferIndex++] = 0;
        // maxNumberVcs
        buffer[bufferIndex++] = 1;
        buffer[bufferIndex++] = 0;
        // maxBufferSize
        buffer[bufferIndex++] = (byte) 0x00;