Main EJB framework components

There are six main framework components of EJB technology (Figure 2-1):

Figure 2-1. Main EJB framework components

  • EJB server— Provides the actual primary services to all EJBs. An EJB server may host one or more EJB containers. It is also called generically an Enterprise Java Server (EJS). WebSphere Application Server is an EJS.

  • EJB container— Provides the runtime environment for the enterprise bean instances, and is the intermediary between the EJB component and the server.

  • EJB component— These represent the actual EJBs themselves. There are three types of enterprise beans: entity, session, and message-driven beans. ...

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