Types of EJB
The EJB 2.0 specification has several major and important additions and changes. One of the biggest additions has been a new type of bean—a message-driven bean. These beans provide the J2EE applications with the capability to be triggered by a messaging engine, and more specifically by the arrival of a specific message. Three types of beans are defined in the EJB specifications: entity beans, session beans, and message-driven beans. Each bean enables a specific set of interactions between the client and the J2EE application.
Entity Beans
An entity bean represents the different data objects of a J2EE application and the relationships between them. Entity beans are a representation of a J2EE application's data, and are independent ...
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