Enterprise JavaBeans, 3.0

13.1. Titan's Maintenance Timer Titan Cruises has a policy of performing regular maintenance on its ships. For example, the engines require extensive and varied maintenance activities throughout the year, as do navigation equipment, com...

13.2. Timer Service API The Timer Service enables an enterprise bean to be notified when a specific date has arrived, when some period of time has elapsed, or at recurring intervals. To use the Timer Service, an enterprise bean must ...

13.3. Transactions When a bean calls createTimer( ), the operation is performed in the scope of the current transaction. If the transaction rolls back, the timer is undone: it's not created (or, more precisely, it's uncreated). For example...

13.4. Stateless Session Bean Timers Our Ship Maintenance EJB example was an example of a stateless session bean's usage of the Timer Service. Stateless session bean timers can be used for auditing or batch processing . As an auditing agent, a...

13.5. Message-Driven Bean Timers Message-driven bean timers are similar to stateless session bean timers in several ways. Timers are associated only with the type of bean. When a timer expires, a message-driven bean instance is selected...