// 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.

- Java 17+
- Maven 3.6.3 or later
- Run Maven, specifying a location into which the completed Maven distro should be installed:
    ```
    mvn -DdistributionTargetDir="$HOME/app/maven/apache-maven-4.0.x-SNAPSHOT" clean package
    ```


[home]: https://maven.apache.org/
[license]: https://www.apache.org/licenses/LICENSE-2.0
[build]: https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven/job/master/

        protected int numOfThreads = 1;

        /**
         * Whether to run in cleanup mode to remove old thumbnails.
         */
        @Option(name = "-c", aliases = "--cleanup", usage = "Clean-Up mode")
        protected boolean cleanup;

        /**
         * Default constructor for command-line options.
         */
        protected Options() {
            // nothing
        }

        // When filter is used, it must not be called for the invalid entry
        if (useFilter) {
            verify(filter, times(1)).accept(any());
        }
    }

    @Test
    @DisplayName("close() clears pending element and hasNext() becomes false")
    void closeClearsNext() throws Exception {
        SmbFile parent = newParent();
        List<FileEntry> entries = Collections.singletonList(entry("one", SmbConstants.TYPE_SHARE));

	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 {

		}

		if err := tx.Find(reflectResults.Addr().Interface()).Error; err != nil {
			return err
		}
	}

	fieldValues := make([]interface{}, len(relForeignFields))

	// clean up old values before preloading
	switch reflectValue.Kind() {
	case reflect.Struct:
		switch rel.Type {
		case schema.HasMany, schema.Many2Many:

    * `description`: un `str` con una breve descripción para la documentación externa.
    * `url` (**requerido**): un `str` con la URL para la documentación externa.

### Crear metadata para etiquetas

Probemos eso en un ejemplo con etiquetas para `users` y `items`.

Crea metadata para tus etiquetas y pásala al parámetro `openapi_tags`:

{* ../../docs_src/metadata/tutorial004.py hl[3:16,18] *}

            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)