1 Reply Latest reply on Oct 21, 2009 10:02 AM by kapitanpetko

Stateless component null?

ypasmk Oct 21, 2009 9:02 AM

Hi i have one stateless and one stateful bean ... my stateless bean is :

@Stateless
@Name("processor")
public class SchedJobAction implements SchedJob{

        @Logger
        private Log log;
        
        @In QuartzTriggerHandle timer;
        
        
        
        @Asynchronous
        public void scheduleAlert(@Expiration Date when,
                        @IntervalDuration Long interval,
                        @FinalExpiration Date endDate) {
                
                
                log.info("working now");
                
        }
        
        public void testMethod() {
                
                log.info("test method ok");
        }

}

my stateful bean is

@Stateful
@Name("testJobAction")
public class testJobAction implements testJob {
        
        @Logger
        private Log log;
        
        @In(create=true)
        SchedJobAction processor;
        
        @Remove @Destroy
        public void destroy() {
                // TODO Auto-generated method stub
                
        }

        public void startJob() {
                // TODO Auto-generated method stub
                log.info("hi there");
                
                Calendar cal = Calendar.getInstance ();
                cal.set (209, Calendar.OCTOBER, 21);
                
                //SchedJobAction processor=new SchedJobAction();
                
                processor.testMethod();
                
        }

        
}

when the startJob method is called I get the following exception

        ... 93 more
Caused by: java.lang.IllegalArgumentException: Could not set field value by reflection: testJobAction.processor on: panda.test.testJobAction with value: class org.javassist.tmp.java.lang.Object_$$_javassist_seam_4
        at org.jboss.seam.util.Reflections.set(Reflections.java:86)
        at org.jboss.seam.Component.setFieldValue(Component.java:1923)
        ... 121 more
Caused by: java.lang.IllegalArgumentException
        at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:63)
        at java.lang.reflect.Field.set(Field.java:657)
        at org.jboss.seam.util.Reflections.set(Reflections.java:71)
        ... 122 more
09:58:14,362 WARN  [lifecycle] #{testJobAction.startJob}: javax.ejb.EJBTransactionRolledbackException: could not set field value: testJobAction.processor
javax.faces.FacesException: #{testJobAction.startJob}: javax.ejb.EJBTransactionRolledbackException: could not set field value: testJobAction.processor
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
        at javax.faces.component.UICommand.broadcast(UICommand.java:387)
        at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)
        at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)
        at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)

If I remove the

 @In SchedJobAction processor

and just insert

SchedJobAction processor=new SchedJobAction()

then when the processor.testMethod() is called, the timer and log are both null...what am I doing wrong?

1. Re: Stateless component null?

kapitanpetko Oct 21, 2009 10:02 AM (in response to ypasmk)
Since SchedJobAction is an SLSB, you need to use the interface when injecting.
The value that gets injected is a proxy and is not an instance of SchedJobAction (Cf. class org.javassist.tmp.java.lang.Object_$$_javassist_seam_4), but is an instance of SchedJob

So use:

@In(create=true) SchedJob processor;

If you want to use Seam features (injection, etc), you should not instantiate with new.
Use Component.getInstance(), @Autocreate or @In(create=true) instead.

HTH
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