14.2.3. About Synchronous and Asynchronous Notifications

By default, notifications in Red Hat JBoss Data Grid are dispatched in the same thread that generates the event. Therefore the listener must be written in a way that does not block or prevent the thread's progression.

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 { .... }

@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.