java - 如何使用 Spring 2.5 将资源注入(inject) EJB3 bean？

Question

如果我在使用 Spring 2.5 作为 DI 的应用程序中创建一个 EJB3 bean(比如说无状态 session bean)，我应该如何在不将 bean 耦合到 Spring 的情况下将 Spring 的依赖项注入(inject)到该 bean 中？

Answer 1

我不知道您是否考虑将拦截器用作耦合，但据我所知这是标准方法。来自Chapter 18. Enterprise Java Beans (EJB) integration文档:

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 (i.e. the name of the context definition in beanRefContext.xml) can be explicitly specified either through overriding the getBeanFactoryLocatorKey method in a custom SpringBeanAutowiringInterceptor subclass.

我所知道的唯一其他选择(扩展 EJB 2.x 支持类)从耦合的角度来看要糟糕得多(因此无法回答您的问题)。

另见

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