ejb การใช้

• The EJB specification is a subset of the Java EE specification.
• Thus, Servlet or EJB applications are made available through Web services.
• It became the Java EE EJB 3.0 JPA reference implementation.
• The target WOLA-enabled EJB is unaware the proxy is in use.
• Using SOAP results in a performance penalty as compared to accessing the EJB directly.
• It distinguishes between an application server such as an EJB server and an application component.
• JNDI names for EJB session beans are assigned by the EJB container via the following scheme:
• JNDI names for EJB session beans are assigned by the EJB container via the following scheme:
• Old EJB containers from many vendors required more deployment information than that in the EJB specification.
• Old EJB containers from many vendors required more deployment information than that in the EJB specification.
• PKUAS group is now working on supporting J2EE 1.5 and EJB 3.0.
• Some Java Application Servers leave off many Java EE features like EJB and Jetty from Eclipse Foundation.
• Up to 2005, PKUAS had implemented J2EE 1.4 and EJB 2.0 specifications.
• Implementations of this model include CORBA, Enterprise JavaBean ( EJB ), and . NET Framework.
• The Management EJB ( MEJB ) component provides interoperable remote access of the model to J2EE application components.
• As demonstrated, the EJB focuses only on business logic and persistence and knows nothing about any particular presentation.
• Instead, the programmer declares in an external XML file which EJB services should be added to the bean:
• Each module element contains an ejb, web or java element which describes the individual modules within the application.
• Making use of a UserTransaction is thus not necessary in EJB programming, but might be needed for very specialized code.
• Other task extensions exist for Perforce, . Net, EJB, and filesystem manipulations, just to name a few.