Using Java: enterprise Java Beans: an overview

• Autores: Prithvi Rao
• Localización: ;login:: the magazine of USENIX & SAGE, ISSN 1044-6397, Vol. 25, Nº. 8, 2000, págs. 27-29
• Idioma: inglés
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• Resumen

  • It goes without saying that distributed applications are here to stay. One reason for this is that hardware and software advances have made it possible for computers to talk to one another across a network relatively more easily than perhaps ten years ago. Whereas hardware has permitted connectivity of a heterogeneous arrangement of machines on a network, writing the software has been a more arduous endeavor.

    The enabling capability that facilitates the running of distributed applications is the Remote Procedure Call (RPC), a network service whereby a remote client can make a procedure call that may be executed on a remote server.

    Although RPC was a major breakthrough in permitting networks of machines to run distributed applications (filesystems are one example), the Application Programmer�s Interface (API) � was not simple to master, affecting the ability to write robust and extensible applications in reasonable time.

    In more recent times, RPC has been adopted as the transport mechanism for the Component Object Model (COM) and Distributed COM (DCOM), as well as the Common Request Broker Architecture (CORBA) and Remote Method Invocation (RMI).

    In this article I present a brief overview of the various object technologies and then a summary of Enterprise Java Beans (EJB). In future articles I will provide more detailed examples on how to write an EJB application