static class QueuingRemovalListener<K, V> extends ConcurrentLinkedQueue<RemovalNotification<K, V>>
      implements RemovalListener<K, V> {

    @Override
    public void onRemoval(RemovalNotification<K, V> notification) {
      add(notification);
    }
  }

  /**
   * {@link RemovalListener} that counts each {@link RemovalNotification} it receives, and provides
   * access to the most-recently received one.
   */

            logger.debug("Failed to delete remaining log notifications.", e);
        }

        return "Sent log notifications: " + events.size() + " events.";
    }

    /**
     * Formats a list of log notification events into a human-readable summary string.
     *
     * @param events the list of log notification events
     * @param maxDetailsLength the maximum length of the details string

            content = f"notification for {email}: {message}"
            email_file.write(content)


    @app.post("/send-notification/{email}")
    async def send_notification(email: str, background_tasks: BackgroundTasks):
        background_tasks.add_task(write_notification, email, message="some notification")
        return {"message": "Notification sent in the background"}
    ```
    """

    // Verify that each received removal notification was valid
    for (RemovalNotification<String, String> notification : removalListener) {
      assertWithMessage("Invalid removal notification")
          .that(notification.getValue())
          .isEqualTo(notification.getKey());
    }

    CacheStats stats = cache.stats();

    // Verify that each received removal notification was valid
    for (RemovalNotification<String, String> notification : removalListener) {
      assertWithMessage("Invalid removal notification")
          .that(notification.getValue())
          .isEqualTo(notification.getKey());
    }

    CacheStats stats = cache.stats();

This includes, for example:

* Email notifications sent after performing an action:
    * As connecting to an email server and sending an email tends to be "slow" (several seconds), you can return the response right away and send the email notification in the background.
* Processing data:

                    logger.warn("Failed to write log notifications: {}", response.buildFailureMessage());
                }
            }
        } catch (final Exception e) {
            logger.debug("Failed to flush log notifications to OpenSearch.", e);
        }
    }

    /**
     * Flushes all buffered log notification events immediately.
     */
    public void flush() {
        expired();

    // Notification Configuration
    // ============================================================

    /** Notification configuration for login page. */
    public static final String NOTIFICATION_LOGIN = "notification.login";

    /** Notification configuration for search top page. */
    public static final String NOTIFICATION_SEARCH_TOP = "notification.search.top";

    @Size(max = 1000)
    public String crawlingUserAgent;

    /** Notification message displayed on the advanced search page. */
    @Size(max = 3000)
    public String notificationAdvanceSearch;

    /** Slack webhook URLs for notifications. */
    @Size(max = 10000)
    public String slackWebhookUrls;

    /** Google Chat webhook URLs for notifications. */
    @Size(max = 10000)
    public String googleChatWebhookUrls;

		<div class="login-logo">
			<la:link href="/">
				<img src="${fe:url('/images/logo-top.png')}"
					alt="<la:message key="labels.header_brand_name" />" />
			</la:link>
		</div>
		<div class="notification">${notification}</div>
		<div class="card">
			<div class="card-body login-card-body">
				<p class="login-box-msg">
					<la:message key="labels.login" />
				</p>
				<%-- Message --%>
				<div>