What is an enterprise bean?

Richard Monson-Haefel

An enterprise bean is a server-side component -- defined in the Java technology -- which adheres to the Enterprise JavaBeans server-side component model. A server-side component is business object that can be accessed remotely. Many server-side component models exist: CORBA specifies CORBA objects; Microsoft Transaction Server (MTS) defines COM/DCOM; and EJB specifies enterprise beans.

Enterprise beans can be developed to represent business concepts like Employee, Order, TravelAgent, etc. Enterprise beans can be assembled into applications that solve enterprise business problems.

EJB has two basic types of enterprise beans: Session and Entity. Depending on the type of enterprise bean used, features like persistence, transactions, security, and multiple concurrent access can be managed automatically.

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