Enterprise JavaBeans

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Enterprise JavaBeans

(specification, business, programming)
(EJB) A server-side component architecture for writing reusable business logic and portable enterprise applications. EJB is the basis of Sun's Java 2 Platform, Enterprise Edition (J2EE).

Enterprise JavaBean components are written entirely in Java and run on any EJB compliant server. They are operating system, platform, and middleware independent, preventing vendor lock-in.

EJB servers provide system-level services (the "plumbing") such as transactions, security, threading, and persistence.

The EJB architecture is inherently transactional, distributed, multi-tier, scalable, secure, and wire protocol neutral - any protocol can be used: IIOP, JRMP, HTTP, DCOM etc. EJB 1.1 requires RMI for communication with components. EJB 2.0 is expected to require support for RMI/IIOP.

EJB applications can serve assorted clients: browsers, Java, ActiveX, CORBA etc. EJB can be used to wrap legacy systems.

EJB 1.1 was released in December 1999. EJB 2.0 is in development.

Sun claims broad industry adoption. 30 vendors are shipping server products implementing EJB. Supporting vendors include IBM, Fujitsu, Sybase, Borland, Oracle, and Symantec.

An alternative is Microsoft's MTS (Microsoft Transaction Server).


References in periodicals archive ?
Bridging the gap between old and new data, Jacada Integrator creates reusable components out of applications running on IBM zSeries mainframe, IBM iSeries midrange, and UNIX hosts and deploys these components as XML, Enterprise JavaBeans, Java Server Pages, Active Server Pages, and Web services.
Java, Enterprise JavaBeans, JavaServer Pages, and JDBC are trademarks of Sun Microsystems Inc.
Throughout the course, participants rapidly learn, first-hand, how to develop Enterprise JavaBeans (EJB) and utilize them to build robust, enterprise-level applications.
As a result, developers and organizations using Enterprise JavaBeans can now more easily improve the efficiency, quality, and cost effectiveness of development projects while building innovative enterprise applications - on schedule and under budget.
In addition, applications fully leverage the benefits of the Oracle 9iAS lightweight, high performance J2EE environment, including a JSP translator, a Java Servlet engine, and an Enterprise JavaBeans (EJB) container, as well as all the J2EE 1.

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