// so there is no object state put at risk by stopping the threads abruptly. In some cases a test
  // may put a thread into an uninterruptible operation intentionally, so there is no other way to
  // clean up these threads.
  @SuppressWarnings("deprecation")
  @Override
  public void tearDown() throws Exception {
    stop();
    join();

    if (uncaughtThrowable != null) {

        return handles.size();
    }

    private void periodicMaintenance() {
        if (shutdown) {
            return;
        }

        lock.writeLock().lock();
        try {
            // Clean up expired handles
            handles.entrySet().removeIf(entry -> {
                HandleInfo info = entry.getValue();
                if (info.isExpired() && !info.isReconnecting()) {

This can be very useful for setting up **resources** that you need to use for the whole app, and that are **shared** among requests, and/or that you need to **clean up** afterwards. For example, a database connection pool, or loading a shared machine learning model.

## Use Case { #use-case }

Let's start with an example **use case** and then see how to solve it with this.

	ahs.Lock()
	defer ahs.Unlock()

	for _, ep := range healLocalDisks {
		ahs.healLocalDisks[ep] = false
	}
}

func (ahs *allHealState) periodicHealSeqsClean(ctx context.Context) {
	// Launch clean-up routine to remove this heal sequence (after
	// it ends) from the global state after timeout has elapsed.
	periodicTimer := time.NewTimer(time.Minute * 5)
	defer periodicTimer.Stop()

	for {
		select {

        });
        saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
        return redirect(getClass());
    }

    /**
     * Clears all crawler indices including queue, data, and filter indices.
     *
     * @param form the action form (validated but not used for configuration)
     * @return HTML response redirecting to the maintenance page
     */

            assertTrue("Content should contain 'Thread:'", content.contains("Thread:"));
            assertTrue("Content should contain stack trace elements", content.contains("\tat "));

        } finally {
            // Clean up
            Files.deleteIfExists(tempFile);
        }
    }

    public void test_writeThreadDump_withInvalidPath() {
        // Test with invalid file path (directory that doesn't exist)

    @Override
    public void setUp() throws Exception {
        super.setUp();
        webApiFilter = new WebApiFilter();
    }

    @Override
    public void tearDown() throws Exception {
        // Clear WebApiManagerFactory
        super.tearDown();
    }

    // Test constructor
    public void test_constructor() {
        assertNotNull(new WebApiFilter());
    }

    // Test init method

---

## Instalar FastAPI

El primer paso es instalar FastAPI.

Asegúrate de crear un [entorno virtual](../virtual-environments.md){.internal-link target=_blank}, actívalo, y luego **instala FastAPI**:

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

      sleepMicros("R", micros);
    }

    String readEventsAndClear() {
      try {
        return events.toString();
      } finally {
        events.clear();
      }
    }

    @Override
    public String toString() {
      return events.toString();
    }
  }

  @AndroidIncompatible // Mockito loses its ability to mock doGetRate as of Android 21

      monitor.leave();
    }
  }

  /**
   * Atomically removes all of the elements from this queue. The queue will be empty after this call
   * returns.
   */
  @Override
  public void clear() {
    E[] items = this.items;
    Monitor monitor = this.monitor;
    monitor.enter();
    try {
      int i = takeIndex;
      int k = count;
      while (k-- > 0) {
        items[i] = null;