Enterprise JavaBeans 3.1, 6th Edition

Bean Class @AroundInvoke Methods

This chapter has mostly discussed interceptor classes. @AroundInvoke methods can also exist inside EJB bean classes. When used inside a bean class, the @AroundInvoke method will be the last “interceptor” to be invoked before the actual bean method:

@Stateless
public class MySessionBean implements MySessionRemote {

   public void businessMethod( ) {
      ...
   }

   @AroundInvoke
   public Object beanClassInterceptor(InvocationContext ctx) {
      try {
         System.out.println("entering: " + ctx.getMethod( ));
         return ctx.proceed( );
      } finally {
         System.out.println("leaving: " + ctx.getMethod( ));
      }
   }
}

This is a simple example of a bean class @AroundInvoke method. For what sorts of things would you want to use it? You may want to have a dynamic implementation of your bean class, or you may have an interceptor whose logic is specific to the bean.