如何使用Spring 2.5将资源注入EJB3 bean？

Question

如果我在使用Spring 2.5 for DI的应用程序中创建EJB3 bean（比如无状态会话bean），我应该如何将Spring中的依赖项注入bean而不将bean耦合到Spring？

Answer 1

I don't know if you consider applying an interceptor as coupling but that's to my knowledge the standard approach. From the Chapter 18. Enterprise Java Beans (EJB) integration of the documentation:

18.3.2. EJB 3 injection interceptor

For EJB 3 Session Beans and Message-Driven Beans, Spring provides a convenient interceptor that resolves Spring 2.5's @Autowired annotation in the EJB component class: org.springframework.ejb.interceptor.SpringBeanAutowiringInterceptor . This interceptor can be applied through an @Interceptors annotation in the EJB component class, or through an interceptor-binding XML element in the EJB deployment descriptor.

 @Stateless @Interceptors(SpringBeanAutowiringInterceptor.class) public class MyFacadeEJB implements MyFacadeLocal { // automatically injected with a matching Spring bean @Autowired private MyComponent myComp; // for business method, delegate to POJO service impl. public String myFacadeMethod(...) { return myComp.myMethod(...); } ... } 

SpringBeanAutowiringInterceptor by default obtains target beans from a ContextSingletonBeanFactoryLocator , with the context defined in a bean definition file named beanRefContext.xml . By default, a single context definition is expected, which is obtained by type rather than by name. However, if you need to choose between multiple context definitions, a specific locator key is required. The locator key (ie the name of the context definition in beanRefContext.xml ) can be explicitly specified either through overriding the getBeanFactoryLocatorKey method in a custom SpringBeanAutowiringInterceptor subclass.

The only other option I'm aware of (extending the EJB 2.x support classes) is much worse from a coupling point of view (and thus doesn't answer your question).

See also

• Default Injecting Spring bean to EJB3 SLSB without @Autowired Annotation