Intercepting method calls on non EJB Seam component

[javanaute]

Hello,

I have my seam components (View Backed Beans) and i would like to intercept each method call. How can i do that ?

Am aware of section 6 in the documentation but it looks like it works only when my seam components are EJBs and i don't want to have them so.

Thanks for any help.

[asookazian]

You can even use Seam interceptors with JavaBean components, not just EJB3 beans!

No example cited.

So I created one.  No EJBs.

ProfilingInterceptor.java:

public class ProfilingInterceptor {
     
     Log log = Logging.getLog(ProfilingInterceptor.class); 

    @AroundInvoke
    public Object profile(InvocationContext ic) throws Exception {
         
         log.info("*** Entering method: " + ic.getMethod().getName());
        
        long startTime = 0;
        long endTime = 0;
        try {
            startTime = System.currentTimeMillis();            
            return ic.proceed();
        } finally {
            endTime = System.currentTimeMillis();
            log.info("*** Method " + ic.getClass() + "." + ic.getMethod() + " executed in " + (endTime - startTime) + "ms ***");
        }
    }
}

ProfileMe.java:

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Interceptors(ProfilingInterceptor.class)
public @interface ProfileMe {}

TestStartupInterceptor.java:

@Name("startupInterceptor")
@ProfileMe
@Scope(ScopeType.APPLICATION)
@Startup
public class TestStartupInterceptor {

     @Create
     public void init(){
          try{
               Thread.sleep(5000);
          }
          catch(Exception e){
               //no op
          }
     }
}

09:58:45,552 INFO  [ProfilingInterceptor] *** Entering method: init
09:58:50,552 INFO  [ProfilingInterceptor] *** Method class org.jboss.seam.intercept.EE5SeamInvocationContext.public void org.jboss.seam.example.booking.TestStartupInterceptor.init() executed in 5000ms ***

[asookazian]

https://jira.jboss.org/jira/browse/JBSEAM-4327

Add example code of how to use Seam interceptors with JavaBean components in ref doc