Beginning EJB 3: Java EE 7 Edition by Peter Zadrozny, Raghu Kodali, Jonathan Wetherbee, Chirag

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By Peter Zadrozny, Raghu Kodali, Jonathan Wetherbee, Chirag Rathod

Increase robust, standards-based, back-end enterprise good judgment with starting EJB three, Java EE 7 variation. Led via an writer staff with two decades of mixed firm JavaBeans event, you'll how one can use the recent EJB 3.2 APIs. You'll achieve the data and talents you’ll have to create the advanced company functions that run today's transactions and more.

Targeted at Java and Java EE builders, with and with no earlier EJB adventure, starting EJB three is filled with functional insights, process advice, and code examples. As every one bankruptcy unfolds, you'll not just discover a brand new zone of the spec; you'll additionally see how one can use it on your individual purposes via particular examples.

Beginning EJB three will serve not just as a reference, however it also will functionality as a how-to advisor and repository of functional examples to that you may refer as you construct your personal purposes. it's going to assist you harness the ability of EJBs and take your Java EE 7 improvement to the subsequent point.

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Additional info for Beginning EJB 3: Java EE 7 Edition

Example text

Pacific Time” • • @Schedule(dayOfWeek="Fri") “Every six hours on weekends” • • @Schedule(second="*", minute="*", hour="*") @Schedule(dayOfMonth="-1") “Every day only for year 2013” • @Schedule(year="2013") Timer Persistence Timers are persistent. A timer is persisted by the Timer Service by storing it in a database. The database used by the Timer Service can be changed by setting the Timer Service’s Timer DataSource setting to a valid JDBC resource. Persistence helps timers survive application shutdown, container crashes, and container shutdowns.

Users of the application will type in or choose one or more search criteria, which will be submitted to the SearchFacade session bean. 2. The SearchFacade bean will access back-end databases to retrieve the requested information. To simplify the code examples in this chapter, we will actually retrieve the list of hard-coded values within the bean class. In later chapters, we will augment the SearchFacade bean to access the back-end database. 3. The bean returns to the client applications the information that satisfied the search criteria.

The PreDestroy Method @PreDestroy public void exit() { // items list into the database. println("Saved items list into database"); } The @Remove annotation is a useful lifecycle method for stateful session beans. When the method with the @Remove annotation is called, the container will remove the bean instance from the object pool after the method is executed. Listing 2-16 shows the code for the stopSession() method, which has the @Remove annotation. Listing 2-16. The Remove Method @Remove public void stopSession() { // The method body can be empty.

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