By Peter Zadrozny, Raghu Kodali, Jonathan Wetherbee, Chirag Rathod
Increase robust, standards-based, back-end company common sense with starting EJB three, Java EE 7 version. Led by means of an writer workforce with twenty years of mixed firm JavaBeans adventure, you'll the right way to use the hot EJB 3.2 APIs. You'll achieve the information and abilities 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 out past EJB event, starting EJB three is filled with functional insights, approach suggestions, and code examples. As each one bankruptcy unfolds, you'll not just discover a brand new quarter 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 consultant and repository of functional examples to that you may refer as you construct your individual purposes. it's going to assist you harness the facility of EJBs and take your Java EE 7 improvement to the subsequent point.
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Extra resources for Beginning EJB 3: Java EE 7 Edition
This section will walk you through the installation and environment setup required for the samples in this chapter. Compiling the Session Beans and their Clients Copy the Chapter02-SessionSamples directory and its contents into a directory of your choice. Run the NetBeans IDE and open the Chapter02-SessionSamples project using the File ➤ Open Project menu. Make sure the Open Required Projects checkbox is checked. Figure 2-7. chapter02 package. Similarly, the three client servlets appear under the Chapter02-SessionSamples-war node.
Listing 2-6. put("France","Bordeaux"); } The PreDestroy callback happens before the container destroys an unused or expired bean instance from its object pool. This callback can be used to close any connection pool that has been created with dependency injection and also to release any other resources. In the case of the SearchFacade session bean, we could add a PreDestroy callback method (destroyWineList()) into the SearchFacade bean, which would clear the country wine list whenever the bean gets destroyed.
Prerequisites Before performing any of the steps detailed in the next sections, complete the “Getting Started” section of Chapter 1. This section will walk you through the installation and environment setup required for the samples in this chapter. Compiling the Session Beans and their Clients Copy the Chapter02-SessionSamples directory and its contents into a directory of your choice. Run the NetBeans IDE and open the Chapter02-SessionSamples project using the File ➤ Open Project menu. Make sure the Open Required Projects checkbox is checked.