doneSignal.countDown();
      }
    }.start();

    try {
      computingSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

    map.put(one, two);
    assertSame(two, map.get(one));
    startSignal.countDown();

    try {
      doneSignal.await();
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }

Dans cet exemple, la fonction de tâche écrira dans un fichier (afin de simuler un envoi d'email).

L'opération d'écriture n'utilisant ni `async` ni `await`, on définit la fonction avec un `def` normal.

{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}

## Ajouter une tâche d'arrière-plan

## ✍ 📋 🔢

✍ 🔢 🏃 🖥 📋.

⚫️ 🐩 🔢 👈 💪 📨 🔢.

⚫️ 💪 `async def` ⚖️ 😐 `def` 🔢, **FastAPI** 🔜 💭 ❔ 🍵 ⚫️ ☑.

👉 💼, 📋 🔢 🔜 ✍ 📁 (⚖ 📨 📧).

& ✍ 🛠️ 🚫 ⚙️ `async` & `await`, 👥 🔬 🔢 ⏮️ 😐 `def`:

{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}

## 🚮 🖥 📋

🔘 👆 *➡ 🛠️ 🔢*, 🚶‍♀️ 👆 📋 🔢 *🖥 📋* 🎚 ⏮️ 👩‍🔬 `.add_task()`:

	}

	var i int
	for toExpire := range expireCh {
		select {
		case <-ctx.Done():
			return
		default:
		}
		if i > 0 {
			if wait := globalBatchConfig.ExpirationWait(); wait > 0 {
				time.Sleep(wait)
			}
		}
		i++
		wk.Take()
		go func(toExpire []expireObjInfo) {
			defer wk.Give()

			toExpireAll := make([]expireObjInfo, 0, len(toExpire))

            throw new FessSystemException("Invalid format: " + time);
        }
        return values;
    }

    /**
     * Sets the wait time in milliseconds when the crawler is not running.
     *
     * @param crawlerWaitMillis the wait time in milliseconds
     */
    public void setCrawlerWaitMillis(final long crawlerWaitMillis) {
        this.crawlerWaitMillis = crawlerWaitMillis;
    }

In diesem Fall schreibt die Taskfunktion in eine Datei (den Versand einer E-Mail simulierend).

Und da der Schreibvorgang nicht `async` und `await` verwendet, definieren wir die Funktion mit normalem `def`:

{* ../../docs_src/background_tasks/tutorial001.py hl[6:9] *}

## Den Hintergrundtask hinzufügen

@REM
@REM   JAVA_HOME           (Optional) Points to a Java installation.
@REM   MAVEN_BATCH_ECHO    (Optional) Set to 'on' to enable the echoing of the batch commands.
@REM   MAVEN_BATCH_PAUSE   (Optional) set to 'on' to wait for a key stroke before ending.
@REM   MAVEN_OPTS          (Optional) Java runtime options used when Maven is executed.
@REM   MAVEN_SKIP_RC       (Optional) Flag to disable loading of mavenrc files.

        assertFalse(channelInfo.isHealthy());
    }

    @Test
    void testActivityTracking() {
        long initialTime = channelInfo.getLastActivityTime();

        // Wait a bit and update activity
        try {
            Thread.sleep(10);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }

        channelInfo.updateActivity();

    ```
    git commit -am "Prepare for release $RELEASE_VERSION."
    git tag -a parent-$RELEASE_VERSION -m "Version $RELEASE_VERSION"
    git push && git push --tags
    ```

5. Wait for [GitHub Actions][github_actions] to start the publish job.

6. Prepare for ongoing development and push to GitHub.

    ```
    sed -i "" \
      "s/version = \".*\"/version = \"$NEXT_VERSION\"/g" \

   * Connections will still be closed if they idle beyond the keep-alive but will be replaced.
   */
  @JvmField val minimumConcurrentCalls: Int = 0,
  /** How long to wait to retry pre-emptive connection attempts that fail. */
  @JvmField val backoffDelayMillis: Long = 60 * 1000,
  /** How much jitter to introduce in connection retry backoff delays */
  @JvmField val backoffJitterMillis: Int = 100,