0 Replies Latest reply on Jan 16, 2007 3:40 AM by FRANCOIS MICHAUD

    How call EJB 3.0 in scheduler ?

    FRANCOIS MICHAUD Newbie

      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.