Interceptor method on @Timeout method

[Naren Chivukula]

Hi,
I have something demonstrated on my system using JBoss7.1.1 application server, where I used EJB3.1 stateless session bean with @Timeout method with interceptor and it works! This contradicts to Frits Enterprise Java Beans 3.pdf document. Correct me if I'm wrong in the interpretation of the document.

In the document on page 42 it says,
Quote:

@Interceptors({PrincipalLogger.class}) interceptor is not called on @Timeout method
@Timeout
public void timerSignal(){
System.out.println("Timer time-out");
}

Below is my code which works,

CalculatorBean.java (for brevity I have not added CalculatorLocal and CalculatorRemote classes)
Code:

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.ejb.Local;
import javax.ejb.LocalBean;
import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.ejb.Timeout;
import javax.ejb.TimerService;
import javax.interceptor.Interceptors;

@Stateless
@LocalBean
@Local(CalculatorLocal.class)
@Remote(CalculatorRemote.class)
public class CalculatorBean {

   @Resource
   private int intNumEntry;
   
   @Resource
   private TimerService timerService;
   
   public int add(int a, int b) {
      return a + b;
   }

   public int subtract(int a, int b) {
      return a - b;
   }

   @Interceptors({ CalculatorLoggingInterceptor.class })
   public Object getEnvEntry() {
      if(timerService.getTimers().size()==0){
         timerService.createTimer(10000, "Refresh the url and you see me!");
      }      
      return intNumEntry;
   }
   

   @Interceptors({ CalculatorLoggingInterceptor.class })   
   @Timeout
   public void backgroundProcessing() {
      System.out.println("Hi, IndoKnight!");      
   }

}

CalculatorLoggingInterceptor.java

Code:

import javax.interceptor.AroundInvoke;
import javax.interceptor.AroundTimeout;
import javax.interceptor.InvocationContext;

public class CalculatorLoggingInterceptor{

   @AroundTimeout
   @AroundInvoke
   public Object log(InvocationContext ctx) throws Exception{
      System.out.println("In log(InvocationContext ctx) for method : "+ctx.getMethod().getName());
      Object returnObj =  ctx.proceed();
      System.out.println("Exiting log(InvocationContext ctx) for method : "+ctx.getMethod().getName());
      return returnObj;
   }
}

Sample output -

Code:

19:10:38,191 INFO  [stdout] (EJB default - 6) In log(InvocationContext ctx) for method : backgroundProcessing

19:10:38,192 INFO  [stdout] (EJB default - 6) Hi, IndoKnight!

19:10:38,192 INFO  [stdout] (EJB default - 6) Exiting log(InvocationContext ctx) for method : backgroundProcessing

I'm re-using the method log() as business method interceptor and @timeout method interceptor methods. Also, note that annotating backgroundProcessing() as @Schedule, also works fine!

[Frits Walraven]

Hi Naren,

interceptor is not called on @Timeout method

What I meant here is that a normal interceptor (one without the @AroundTimeout annotation) will not be called on a timeout. If you remove the @AroundTimeout from the CalculatorLoggingInterceptor, it won't be called on a timeout, right?

I will update that part of my notes to make it clearer.

I like your example!

Regards,
Frits

[Naren Chivukula]

Oh okay, I was sort of thinking that

Thanks.