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Enterprise JavaBeans
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specification, business, programming (EJB) A server-side
and portable enterprise applications. EJB is the basis of
Enterprise JavaBean components are written entirely in Java
and run on any EJB compliant server. They are operatingsystem, platform, and middleware independent, preventing
vendor lock-in.
EJB servers provide system-level services (the "plumbing")
such as transactions, security, threading, and
The EJB architecture is inherently transactional,
distributed, multi-tier, scalable, secure, and wireprotocol 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 legacysystems.
EJB 1.1 was released in December 1999. EJB 2.0 is in