Enterprise JavaBeans, 3.0

2.1. The Entity Bean Entity beans in the Java Persistence 1.0 specification are available only as plain old Java objects (POJOs), and are mapped to tables in a relational database. Unlike other EJB types, entities can be allocated, seriali...

2.2. The Enterprise Bean Component Enterprise JavaBeans server-side components come in two fundamentally different types: session beans and message-driven beans . Session beans are server-side components that can be accessed using a var...

2.3. Using Enterprise and Entity Beans Let's look at how a client would use an enterprise bean to do something useful. In this example, we'll create a TravelAgent session bean that creates a reservation for a remote client. This TravelAgent EJB wi...

2.4. The Bean-Container Contract The environment that surrounds the beans on the EJB server is often called the container. The container is more a concept than a physical construct. It acts as an intermediary between the bean and ...