org.springframework.ejb.support (Spring Framework) - Spring Framework 1.2.9 API 文档英文版

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Package org.springframework.ejb.support

Superclasses to make implementing EJBs simpler and less error-prone, as well as guaranteeing a Spring BeanFactory is available to EJBs.

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Description

Interface Summary

SmartSessionBean Interface to be implemented by Session Beans that want to expose important state to cooperating classes.

Interface Summary
SmartSessionBean	Interface to be implemented by Session Beans that want to expose important state to cooperating classes.

Class Summary

AbstractEnterpriseBean Superclass for all EJBs.

AbstractJmsMessageDrivenBean Convenient superclass for JMS MDBs.

AbstractMessageDrivenBean Convenient superclass for MDBs.

AbstractSessionBean Superclass for all session beans.

AbstractStatefulSessionBean Convenient superclass for stateful session beans.

AbstractStatelessSessionBean Convenient superclass for stateless session beans (SLSBs), minimizing the work involved in implementing an SLSB and preventing common errors.

Class Summary
AbstractEnterpriseBean	Superclass for all EJBs.
AbstractJmsMessageDrivenBean	Convenient superclass for JMS MDBs.
AbstractMessageDrivenBean	Convenient superclass for MDBs.
AbstractSessionBean	Superclass for all session beans.
AbstractStatefulSessionBean	Convenient superclass for stateful session beans.
AbstractStatelessSessionBean	Convenient superclass for stateless session beans (SLSBs), minimizing the work involved in implementing an SLSB and preventing common errors.

Package org.springframework.ejb.support Description

Superclasses to make implementing EJBs simpler and less error-prone, as well as guaranteeing a Spring BeanFactory is available to EJBs. This promotes good practice, with EJB services used for transaction management, thread management, and (possibly) remoting, while business logic is implemented in easily testable POJOs.

In this model, the EJB is a facade, with as many POJO helpers behind the BeanFactory as required.

The classes in this package are discussed in Chapter 11 of Expert One-On-One J2EE Design and Development by Rod Johnson (Wrox, 2002). The present version has changed somewhat, but has the same goals.

Note that the default behavior is to look for an EJB enviroment variable with name ejb/BeanFactoryPath that specifies the location on the classpath of an XML bean factory definition file (such as /com/mycom/mypackage/mybeans.xml). If this JNDI key is missing, your EJB subclass won't successfully initialize in the container.