@Create not called 100% of the time

[chane]

I have the following SFSB:

@Name("finder")
@Stateful
@Scope(ScopeType.EVENT)
@LoggedIn
public class ActivityGenericFinder implements IActivityGenericFinder {

 public ActivityGenericFinder(){
 log.fatal("CONSTRUCTING");
 }

 @Create
 public void initialize(){
 init();
 }

 protected void init(){
 AppUtils.LOG.fatal("INITING");
 }

 public String find(){
 ..do stuff for find...
 }

 public String next(){
 ... change offset ...
 find();
 }

 ........

}

What I have noticed is the the @Create method is not always called. Here is the sequence:

- initial call to find (remember this is an Event scoped component)
* component is constructed and then @create called

- call next
* component is constructed and then @Create called

- wait for session to timeout (set to 1 minute in web.xml for testing)

- call next
* component is constructed
* component @Create is NOT called
!! Exception occurs since important stuff happens in @Create (e.g., initialize variables)

If I move my important stuff to the constructor, everything works as I expect - so I have a workaround. I just don't like it and wondering if I am doing something wrong

I am using 1.2.1p1 on JBoss 4.0.4.

Has anyone else seen this? Thoughts on what to do next?

Chris....

[matt.drees]

Just to clarify, find() and next() are not called in the same request, right?

[matt.drees]

oops. duh. Read your post wrong. Sorry.

[chane]

"matt.drees" wrote:
Just to clarify, find() and next() are not called in the same request, right?

Correct. Each call is in a separate request (click from the GUI).

Chris...

[chane]

I have been able to track it down to a specific place in the Seam code; but now I'm stuck as to how to debug next.....

In Component.callComponentMethod the following is being executed:

public Object callComponentMethod(Object instance, Method method, Object... parameters) {
 Class[] paramTypes = method.getParameterTypes();
 String methodName = method.getName();
 if("bo.activity.finder".equals(name))
 log.fatal("1 CALLING CREATE METHOD["+methodName+"]");
 try
 {
 Method interfaceMethod = instance.getClass().getMethod(methodName, paramTypes);
 if ( paramTypes.length==0 || interfaceMethod.getParameterTypes().length==0 )
 {
 if("bo.activity.finder".equals(name))
 log.fatal("2 CALLING CREATE METHOD["+methodName+"] interfaceMethod["+interfaceMethod+"]");
 return Reflections.invokeAndWrap(interfaceMethod, instance);
 }
 else if ( parameters.length>0 )
 {interfaceMethod["+interfaceMethod+"]");
 return Reflections.invokeAndWrap(interfaceMethod, instance, parameters);
 }
 else
 {interfaceMethod["+interfaceMethod+"]");
 return Reflections.invokeAndWrap(interfaceMethod, instance, this);
 }
 }
 catch (NoSuchMethodException e)
 {
 String message = "method not found: " + method.getName() + " for component: " + name;
 if ( getType().isSessionBean() )
 {
 message += " (check that it is declared on the session bean business interface)";
 }
 throw new IllegalArgumentException(message, e);
 }
 }

The

 if("bo.activity.finder".equals(name))
 log.fatal("2 CALLING CREATE METHOD["+methodName+"]
 return Reflections.invokeAndWrap(interfaceMethod, instance);

Is not being executed correctly. When the session has not expired I get this stack trace:

13:20:26,937 FATAL [Component] NEW COMPONENT[bo.activity.finder] STATE[EVENT] !STATELESS[true] hasCreate[true]
13:20:26,937 FATAL [Component] 1 CALLING CREATE METHOD[initialize]
13:20:26,937 FATAL [Component] 2 CALLING CREATE METHOD[initialize] interfaceMethod[public final void com.itsolut.backoffice.actions.contact.activity.inf.IActivityGenericFinder$$EnhancerByCGLIB$$5d882077.initialize()]
13:20:26,937 FATAL [AppUtils] INITING
java.lang.Exception
 at com.itsolut.backoffice.actions.contact.activity.ActivityGenericFinder.init(ActivityGenericFinder.java:49)
 at com.itsolut.core.action.Finder.initialize(Finder.java:80)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

When I execute the next() after the session is expired I get:

13:22:46,609 FATAL [Component] NEW COMPONENT[bo.activity.finder] STATE[EVENT] !STATELESS[true] hasCreate[true]
13:22:46,609 FATAL [Component] 1 CALLING CREATE METHOD[initialize]
13:22:46,609 FATAL [Component] 2 CALLING CREATE METHOD[initialize] interfaceMethod[public final void com.itsolut.backoffice.actions.contact.activity.inf.IActivityGenericFinder$$EnhancerByCGLIB$$5d882077.initialize()]
 ... and then nothing...the LOG message for INIT is not here like above

Seam looks like it is trying to invoke the @Create method. It just is never actually invoked.

Thoughts? Is this a CGLIB issue?

Chris....

[chane]

I'm not sure what was happening as I had compiled/deployed several times. However, I did a "clean" dist and that seems to have cleared up the issue.

Strange....

At least I learned a little more about the internals of Seam.

Chris....

[matt.drees]

Yeah, I've had experiences like that. Definitely frustrating.

It is kinda cool learning how Seam works, though.
Glad it's working for you.