Download EJB 3.1 Cookbook by Richard M. Reese PDF

By Richard M. Reese

Each one recipe contains step by step directions through an research of what used to be performed in each one job and different helpful details. The publication is designed for you to learn it bankruptcy by way of bankruptcy, or examine the record of recipes and confer with them in no specific order. it's choked with worthy screenshots to make your studying even more straightforward. The e-book is geared toward Java EE and EJB builders and programmers. Readers might be conversant in using servlets within the development of an online software. A operating wisdom of XML is additionally fascinating.

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There is nothing the programmer needs to do to enforce concurrent access. However, if more control on the type of concurrent access used is needed, then the programmer can change the type of lock on a method by method basis or use bean-managed concurrency. The Using container managed concurrency and Using bean managed concurrency recipes address the concurrency issues. 9 Session Beans Sometimes it is desirable to invoke a method of an EJB and not wait for the method to complete its execution. Either the client may not necessarily be concerned with whether the method executes successfully or the client may want to check on its success or failure later.

When you create your projects, be sure to enable context and dependency injection. The code examples do not include import statements. Session Beans Also note that in IDEs such as NetBeans, wizards are frequently used to add elements such as servlets to an application. xml file to map a servlet's name to an URL pattern. If you choose not to use a wizard, you will need to explicitly modify the file itself. Deployment descriptor files are discussed in more detail in Chapter 11, Packaging the EJB.

It possesses methods common to the three sub-interfaces of the EBJContext interface:  SessionContext for Session Beans  MessageDrivenContext for MDB  EntityContext for an Entity Always choose the corresponding context interface for the EJB or entity in use. The EJBContext can be obtained using either dependency inject or JNDI. We have already seen how dependency injection can be used. If we need to use JNDI instead, we need to follow the standard JNDI look up process: 1. Establish an initial context 2.

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