22.4.4. About Synchronous and Asynchronous Notifications

By default, notifications in JBoss Data Grid are dispatched in the same thread that generated the event. Therefore it is important that a listener is written in a way that does not block or prevent the thread from progressing.

Alternatively, the listener can be annotated as asynchronous, which dispatches notifications in a separate thread and prevents blocking the operations of the original thread.

Annotate listeners using the following:

@Listener (sync = false)public class MyAsyncListener { .... }

Use the <asyncListenerExecutor/> element in the configuration file to tune the thread pool that is used to dispatch asynchronous notifications.