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     1. What is EJB?
     
     EJB stands for Enterprise JavaBeans. EJB is a distributed
     object-oriented server component that makes obsolete low-level
     APIs such as for component life-cycle management, transaction
     management, and database processes, and enables the creation of
     server-side program components by simply writing business logic
     processes. With Apdesigner, you can use Java to create server-side
     components (i.e., EJB) and client applications that use EJB. The
     EJB runtime environment absorbs transaction process differences
     that might exist between the TP monitor and DBMS. It is possible
     to create non-platform-dependent server program components.
     
     The next section gives an overview of EJB.
     
     
     Overview of EJB

   
     

     
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     EJB provides the following functions:
     
     Life-cycle management of enterprise bean instances
     Data persistence management
     Transaction management
     Security management
     Session management
     Resource management

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※ 來源: DISP BBS (http://disp.twbbs.org)
※ 作者: ott  來自: 118.166.14.183  時間: 2010-01-19 04:00:18
※ 編輯: ott  來自: 118.166.14.183  時間: 2010-01-19 04:01:31
※ 編輯: ott  來自: 118.166.14.183  時間: 2010-01-19 04:01:57