[jboss-user] [Messaging, JMS & JBossMQ] - How call EJB 3.0 in scheduler ?

[fxmichaud]

Hi,

I'm developping web application and I would like run a scheduling service at JBoss startup.

I'm using JBoss 4.0.5 + Seam 1.1. My Eclipse project has been generated by using Seam-Gen tools.

[resources/META-INF/scheduler-service.xml] file :


  | <?xml version="1.0" encoding="UTF-8"?> 
  | <server>
  | 	<mbean code="org.jboss.varia.scheduler.Scheduler"
  |            name="task:service=Scheduler">
  | 		<attribute name="StartAtStartup">true</attribute>
  | 		<attribute name="SchedulableClass">com.application.intranet.tasks.Task</attribute>
  |         <attribute name="SchedulableArguments">aa,123456789</attribute>
  |         <attribute name="SchedulableArgumentTypes">java.lang.String,long</attribute>
  |                  
  |         <attribute name="InitialStartDate">NOW</attribute>
  |         <attribute name="SchedulePeriod">6000</attribute>
  |         <attribute name="InitialRepetitions">-1</attribute>
  |         <depends>jboss.j2ee:module=fmichaud.jar,service=EJB3</depends>
  | 	</mbean>
  | </server>
  | 

[resources/META-INF/jboss-app.xml] file :


  | <jboss-app>
  |    <loader-repository> 
  |       seam.jboss.org:loader=fmichaud
  |    </loader-repository>
  |    <module>
  | 		<service>META-INF/scheduler-service.xml</service>
  |    </module>
  | </jboss-app>
  | 

My scheduled task class :


  | public class Task implements Schedulable {
  |     private final zLogger log = zLogger.getLogger(getClass());
  |     private String name;
  |     private long value;
  |     
  |     /** Accounts business service EJB. */
  |     @EJB
  |     private AccountsServiceImpl accountsService;
  |     
  |     public Task(String name, long value)
  |     {
  |         this.name = name;
  |         this.value = value;
  |         log.logBusinessEvent(LogLevel.INFO, "ctor, name: " + name + ", value: " + value);
  |     }
  | 
  | 	public void perform(Date now, long remainingRepetitions) {
  | 		Collection<Account> accountsList = accountsService.getEntries(); 
  | 	}
  | }
  | 

I obtain next exception at JBoss startup :

  | 09:35:53,066 ERROR [Scheduler$Listener] Handling a Scheduler call failed
  | java.lang.NullPointerException
  | 	at com.application.intranet.tasks.Task.perform(Task.java:72)
  | 	at org.jboss.varia.scheduler.Scheduler$Listener.handleNotification(Scheduler.java:1251)
  | 	at sun.reflect.GeneratedMethodAccessor57.invoke(Unknown Source)
  | 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  | 	at java.lang.reflect.Method.invoke(Method.java:585)
  | 	at org.jboss.mx.notification.NotificationListenerProxy.invoke(NotificationListenerProxy.java:153)
  | 	at $Proxy46.handleNotification(Unknown Source)
  | 	at javax.management.NotificationBroadcasterSupport.handleNotification(NotificationBroadcasterSupport.java:221)
  | 	at javax.management.NotificationBroadcasterSupport.sendNotification(NotificationBroadcasterSupport.java:184)
  | 	at javax.management.timer.Timer.sendNotification(Timer.java:1295)
  | 	at javax.management.timer.Timer.notifyAlarmClock(Timer.java:1264)
  | 	at javax.management.timer.TimerAlarmClock.run(Timer.java:1347)
  | 	at java.util.TimerThread.mainLoop(Timer.java:512)
  | 	at java.util.TimerThread.run(Timer.java:462)
  | 

In web application or with TestNG, EJB is running.
I tried to lookup jNDI EJB but nothing seems valid.
How to instantiate EJB 3.0 for calling from JBoss scheduler service ?

Thanks for any help.
Regards.


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