EJB modules

An EJB module is used to assemble one or more enterprise beans into a single deployable unit. An EJB module is stored in a standard Java archive (JAR) file.

An EJB module contains the following:

• One or more deployable enterprise beans.
• A deployment descriptor, stored in an Extensible Markup Language (XML) file. This file declares the contents of the module, defines the structure and external dependencies of the beans in the module, and describes how the beans are to be used at run time.

An EJB module can be used as a standalone application, or it can be combined with other EJB modules, or with Web modules, to create a J2EE application. An EJB module is installed and run in an enterprise bean container.

For more information about EJB modules, see "Resources for learning."