{* ../../docs_src/background_tasks/tutorial001.py hl[14] *}

`.add_task()` は以下の引数を受け取ります:

* バックグラウンドで実行されるタスク関数 (`write_notification`)。
* タスク関数に順番に渡す必要のある引数の列 (`email`)。
* タスク関数に渡す必要のあるキーワード引数 (`message="some notification"`)。

## 依存性注入

`BackgroundTasks` の使用は依存性注入システムでも機能し、様々な階層 (*path operations 関数*、依存性 (依存可能性)、サブ依存性など) で `BackgroundTasks` 型のパラメーターを宣言できます。

     * @return The search helper.
     */
    public static SearchHelper getSearchHelper() {
        return getComponent(SEARCH_HELPER);
    }

    /**
     * Gets the notification helper component.
     * @return The notification helper.
     */
    public static NotificationHelper getNotificationHelper() {
        return getComponent(NOTIFICATION_HELPER);
    }

    /**

          <type>String</type>
          <description>The mechanism used to deliver notifications.</description>
        </field>
        <field>
          <name>sendOnError</name>
          <version>4.0.0+</version>
          <defaultValue>true</defaultValue>
          <type>boolean</type>
          <description>Whether to send notifications on error.</description>
        </field>
        <field>

        mockNotifications.add(fileNotifyInfo1);
        mockNotifications.add(fileNotifyInfo2);
        mockNotifications.add(fileNotifyInfo3);
    }

    /**
     * Test watch() method returning notifications
     */
    @Test
    void testWatch() throws CIFSException {
        // Setup mock behavior
        when(watchHandle.watch()).thenReturn(mockNotifications);

        // Execute

                logger.info("[CRAWL INFO] {}", buf);
            }

            // notification
            try {
                crawler.sendMail(infoMap);
            } catch (final Exception e) {
                logger.warn("Failed to send a mail.", e);
            }

        }
    }

    /**
     * Sends email notification with crawling results and statistics.

    }

    // Happy path for SMB2: a response is received and the list is returned; tree is closed
    @Test
    @DisplayName("watch() SMB2 happy path returns notifications and closes tree")
    void watch_smb2_success_returnsList_andClosesTree() throws Exception {
        List<FileNotifyInformation> info = new ArrayList<>();
        NotifyResponse resp = mock(NotifyResponse.class);

Then your API will (let's imagine):

* Send the invoice to some customer of the external developer.
* Collect the money.
* Send a notification back to the API user (the external developer).
    * This will be done by sending a POST request (from *your API*) to some *external API* provided by that external developer (this is the "callback").

	return makeTestTargetURL(endPoint, bucketName, objectName, url.Values{})
}

// return URL for inserting bucket notification.
func getPutNotificationURL(endPoint, bucketName string) string {
	queryValue := url.Values{}
	queryValue.Set("notification", "")
	return makeTestTargetURL(endPoint, bucketName, "", queryValue)
}

// return URL for inserting bucket policy.

     */
    int DEFAULT_RCV_BUF_SIZE = 0xFFFF;
    /**
     * Default send buffer size for SMB transport.
     */
    int DEFAULT_SND_BUF_SIZE = 0xFFFF;
    /**
     * Default buffer size for change notification responses.
     */
    int DEFAULT_NOTIFY_BUF_SIZE = 1024;

    /**
     * Default maximum number of sessions per transport connection.
     */
    int DEFAULT_SSN_LIMIT = 250;
    /**

// This list should be kept alphabetically sorted, do not hastily edit.
var resourceList = []string{
	"acl",
	"cors",
	"delete",
	"encryption",
	"legal-hold",
	"lifecycle",
	"location",
	"logging",
	"notification",
	"partNumber",
	"policy",
	"requestPayment",
	"response-cache-control",
	"response-content-disposition",
	"response-content-encoding",
	"response-content-language",
	"response-content-type",