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Enterprise JavaBeans 3.1, 6th Edition
book

Enterprise JavaBeans 3.1, 6th Edition

by Andrew Lee Rubinger, Bill Burke
September 2010
Intermediate to advanced content levelIntermediate to advanced
766 pages
18h 35m
English
O'Reilly Media, Inc.
Content preview from 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.

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Publisher Resources

ISBN: 9781449399139Errata Page