Developing work objects, event listeners, and asynchronous scopes

Developing work objects to run code in parallel
You can run work objects in parallel, or in a different Java™ Platform, Enterprise Edition (Java EE) context, by wrapping the code in a work object.
Developing event listeners
Application components that listen for events can use the EventSource.addListener() method to register an event listener object (a type of asynchronous bean) with the event source to which the events will be published. An event source also can fire events in a type-safe manner using any interface.
Developing asynchronous scopes
Asynchronous scopes are units of scoping that comprise a set of alarms, subsystem monitors, and child asynchronous scopes. You can create asynchronous scopes, starting with the parent.