Service instances can also be injected into application
 components through the use of the <code>Resource</code> annotation.<p>

 The Jakarta Concurrency specification describes several
 behaviors that a ManagedScheduledExecutorService can implement.  The Application
 Component Provider and Deployer identify these requirements and map the
 resource environment reference appropriately.<p>

 Tasks are run in managed threads provided by the Jakarta&trade; EE Product Provider
 and are run within the application