Code snippet:

@Name("timer")
public class Timer{

    @In Processor processor;
    
    private QuartzTriggerHandle handle;
    
    public void start(){
         processSchedule();
    }
    
    public void stop() throws SchedulerException{
         handle.cancel();
    }
    
    public void pause() throws SchedulerException{
         handle.pause();
    }
    
    public void resume() throws SchedulerException{
         handle.resume();
    }
    
    public void processSchedule(){
         Date start = new Date();
        Calendar end = Calendar.getInstance();
             end.set(2010, Calendar.MAY, 10);
         handle = processor.schedule(start,1000*10L,end.getTime());
         display(handle);
    }
    
    private void display(QuartzTriggerHandle triggerHandle){
         System.out.println("Handle: "+triggerHandle);
         Scheduler scheduler = QuartzDispatcher.instance().getScheduler();
         try {
               System.out.println("Groups: "+scheduler.getJobGroupNames());
               System.out.println("Defualted Jobs: "+scheduler.getJobNames(Scheduler.DEFAULT_GROUP));
     } catch (SchedulerException e) {
          e.printStackTrace();
     }
    }
}

Thank you for quick response. Stack trace for stop():

19:24:46,452 INFO  [STDOUT] Handle: org.jboss.seam.async.QuartzTriggerHandle@5a9737
19:24:46,452 INFO  [STDOUT] Groups: [Ljava.lang.String;@17da237
19:24:46,452 INFO  [STDOUT] Defualted Jobs: [Ljava.lang.String;@124d0d3
19:24:46,546 INFO  [STDOUT] Schedule Triggerred: 1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
19:25:07,568 SEVERE [application] java.lang.NullPointerException
javax.faces.el.EvaluationException: java.lang.NullPointerException
     at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
     .
     .
     .
Caused by: java.lang.NullPointerException
     at adr.scheduler.workout.Timer.stop(Timer.java:50)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
     .
     .
     .
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
     at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
     at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
     ... 52 more
Caused by: java.lang.NullPointerException
     at adr.scheduler.workout.Timer.stop(Timer.java:50)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     .
     .
19:25:07,599 SEVERE [lifecycle] JSF1054: (Phase ID: INVOKE_APPLICATION 5, View ID: /views/timer.xhtml) Exception thrown during phase execution: javax.faces.event.PhaseEvent[source=com.sun.faces.lifecycle.LifecycleImpl@1427c43]
19:25:16,448 INFO  [STDOUT] Schedule Triggerred: 1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
     

Thank you Nikolay! It works.

I over-looked the post http://seamframework.org/Community/QuartzTriggerHandleIsNull#comment100039

Any usage examples for QuatzDispatcher scheduleTimedEvent(), etc.