com.diffusiondata.gateway.framework

Interface MissingTopicNotificationHandler

public interface MissingTopicNotificationHandler

Handler called when any session subscribes using a topic selector that matches no topics.

Its instances can be registered using Publisher.addMissingTopicHandler(String, MissingTopicNotificationHandler).

Author:

DiffusionData Limited

Method Summary

Modifier and Type	Method and Description
CompletableFuture<?>	onMissingTopic(MissingTopicNotification missingTopicNotification) Handle passed missing topic notification.

Method Detail

onMissingTopic

CompletableFuture<?> onMissingTopic(MissingTopicNotification missingTopicNotification)

Handle passed missing topic notification.

This is called when a missing topic notification is received from the server.

A service can do anything upon receiving this notification, such as publishing to a topic for which the notification is received (which will create the topic).

Parameters:

missingTopicNotification - a missing topic notification

Returns:

a CompletableFuture that should complete once handling the notification is complete.

If the task completes successfully, the CompletableFuture result should be null. The result type is any rather than Void to provide forward compatibility with future iterations of this API that may provide a non-null result with a more specific result type.

If the task fails, the CompletableFuture should complete exceptionally.