How Do I Use an EJB?
Given that EJBs are middle-tier business components, they are of little use without a client to drive them. As mentioned earlier, those clients can be Web components, standalone Java clients, or other EJBs.
Regardless of the type of client, using an EJB requires the same set of steps—namely, discovery, retrieval, use, and disposal. These steps are covered in the next three sections.
Discovery
To create or find an EJB, the client must call the appropriate method on the EJB's home interface. Consequently, the first step for the client is to get hold of a remote reference to the home interface. On Day 3, you looked at naming services and how these can be used to register information in a distributed environment. In a J2EE environment, ...
Get Sams Teach Yourself J2EE™ in 21 Days now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
