notify_webhook        publish bucket notifications to webhook endpoints
notify_amqp           publish bucket notifications to AMQP endpoints
notify_kafka          publish bucket notifications to Kafka endpoints
notify_mqtt           publish bucket notifications to MQTT endpoints
notify_nats           publish bucket notifications to NATS endpoints
notify_nsq            publish bucket notifications to NSQ endpoints

```

`.add_task()` erhält als Argumente:

* Eine Taskfunktion, die im Hintergrund ausgeführt wird (`write_notification`).
* Eine beliebige Folge von Argumenten, die der Reihe nach an die Taskfunktion übergeben werden sollen (`email`).
* Alle Schlüsselwort-Argumente, die an die Taskfunktion übergeben werden sollen (`message="some notification"`).

## Dependency Injection

    <module>plexus-ircbot</module>
    <module>plexus-jdo</module>
    <module>plexus-jetty-httpd</module>
    <module>plexus-jetty</module>
    <module>plexus-mimetyper</module>
    <module>plexus-notification</module>
    <module>plexus-resource</module>
    <module>plexus-security</module>
    <module>plexus-summit</module>
    <module>plexus-taskqueue</module>
    <module>plexus-velocity</module>

```

`.add_task()` receives as arguments:

* A task function to be run in the background (`write_notification`).
* Any sequence of arguments that should be passed to the task function in order (`email`).
* Any keyword arguments that should be passed to the task function (`message="some notification"`).

## Dependency Injection

interface FlowControlListener {
  /**
   * Notification that the receiving stream flow control window has changed.
   * [WindowCounter] generally carries the client view of total and acked bytes.
   */
  fun receivingStreamWindowChanged(
    streamId: Int,
    windowCounter: WindowCounter,
    bufferSize: Long,
  )

  /**
   * Notification that the receiving connection flow control window has changed.

```

`.add_task()` reçoit comme arguments :

* Une fonction de tâche à exécuter en arrière-plan (`write_notification`).
* Les arguments positionnels à passer à la fonction de tâche dans l'ordre (`email`).
* Les arguments nommés à passer à la fonction de tâche (`message="some notification"`).

## Injection de dépendances

/*
 [Crawler Notification]
 Crawler notification mail.
*/
subject: [FESS] Crawler completed: /*pmb.hostname*/
>>>
--- Server Info ---
Host Name: /*pmb.hostname:orElse('Unknown')*/
Job Name: /*pmb.jobname:orElse('Unknown')*/

--- Web/FileSystem Crawler ---
Start Time: /*pmb.webFsCrawlStartTime:orElse('-')*/
End Time:   /*pmb.webFsCrawlEndTime:orElse('-')*/
Exec Time:  /*pmb.webFsCrawlExecTime:orElse('-')*/ ms

--- Web/FileSystem Indexer ---

/*
 [Crawler Notification]
*/
subject: [FESS] Status Change: /*pmb.hostname:orElse('Unknown')*/
>>>
--- Server Info ---
Cluster Name: /*pmb.clustername:orElse('Unknown')*/
Host Name: /*pmb.hostname:orElse('Unknown')*/

--- Status ---

```Python hl_lines="14"
{!../../../docs_src/background_tasks/tutorial001.py!}
```

`.add_task()` 接收以下参数：

* 在后台运行的任务函数(`write_notification`)。
* 应按顺序传递给任务函数的任意参数序列(`email`)。
* 应传递给任务函数的任意关键字参数(`message="some notification"`)。

## 依赖注入

使用 `BackgroundTasks` 也适用于依赖注入系统，你可以在多个级别声明 `BackgroundTasks` 类型的参数：在 *路径操作函数* 里，在依赖中(可依赖)，在子依赖中，等等。

**FastAPI** 知道在每种情况下该做什么以及如何复用同一对象，因此所有后台任务被合并在一起并且随后在后台运行：

    <module>plexus-ircbot</module>
    <module>plexus-jdo</module>
    <module>plexus-jetty-httpd</module>
    <module>plexus-jetty</module>
    <module>plexus-mimetyper</module>
    <module>plexus-notification</module>
    <module>plexus-resource</module>
    <module>plexus-security</module>
    <module>plexus-summit</module>
    <module>plexus-taskqueue</module>
    <module>plexus-velocity</module>