public static interface TopicControl.MissingTopicNotificationStream extends Stream
Instances can be registered using
addMissingTopicHandler.
†Missing topic notifications only occur when using the deprecated
Topics.fetch(com.pushtechnology.diffusion.client.topics.TopicSelector, com.pushtechnology.diffusion.client.features.Topics.FetchStream) mechanism. The newer Topics.fetchRequest()
mechanism does not generate missing topic notifications.
| Modifier and Type | Interface and Description |
|---|---|
static class |
TopicControl.MissingTopicNotificationStream.Default
|
| Modifier and Type | Method and Description |
|---|---|
void |
onMissingTopic(TopicControl.MissingTopicNotification notification)
Called when a session requests a topic that does not exist, and the
topic path belongs to part of the topic tree for which this handler
was registered.
|
void onMissingTopic(TopicControl.MissingTopicNotification notification)
The implementation should take the appropriate action (for example,
create the topic), and then call
proceed on the supplied
notification. This allows the session request to continue and
successfully resolve against the topic if it was created.
Alternatively, the handler can call
cancel to discard the
request. A handler should always call proceed or
cancel, otherwise resources will continue to be reserved on
the server and the session's request will not complete.
notification - the missing topic notificationCopyright © 2020 Push Technology Ltd. All Rights Reserved.