4 Replies Latest reply on Oct 15, 2008 9:02 AM by mheidt

    QuartzDispatcher and ClassNotFoundException

    maheidt
    maheidt Feb 28, 2008 10:16 AM

      I have an issue with QuartzDispatcher and scheduleTimedEvent.


      This is the error message:


      21:16:01,118 ERROR [ErrorLogger] Job (DEFAULT.-6ad11a7d:1185c88089f:-7f8e threw an exception.
org.quartz.SchedulerException: Job threw an unhandled exception. 
[See nested exception: org.jboss.seam.InstantiationException: 
Could not instantiate Seam component: danteUsersRetriever]
at org.quartz.core.JobRunShell.run(JobRunShell.java:214)
...
Caused by: javax.naming.CommunicationException 
[Root 
exception is java.lang.ClassNotFoundException: 
No ClassLoaders found for: org.domain.QuartzTest.session.DanteUsersRetriever 
(no security manager: RMI class loader disabled)]




      It's reproducible very easily:



      • AS 4.2.1, Seam 2.0.1.GA

      • Create new seam project

      • change components.xml:





      <components
...
 xmlns:async="http://jboss.com/products/seam/async"
...
 xsi:schemaLocation=
   "...http://jboss.com/products/seam/async http://jboss.com/products/seam/async-2.0.xsd...
>
<async:quartz-dispatcher/>







      • Add two classes




      DanteUsersTimer.java



      package org.domain.QuartzTest.session;
import org.jboss.annotation.ejb.Local;

@Local
public interface DanteUsersTimer {
     public void start() throws Exception;
     public void cancel();
     public void stop();
}






      DanteUsersTimerBean.java


      package org.domain.QuartzTest.session;

import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.Destroy;
import org.jboss.seam.annotations.Logger;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Observer;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.Startup;
import org.jboss.seam.async.CronSchedule;
import org.jboss.seam.async.QuartzDispatcher;
import org.jboss.seam.async.QuartzTriggerHandle;
import org.jboss.seam.log.Log;

@Name("danteUsersTimer")
@Scope(ScopeType.APPLICATION)
@Startup
public class DanteUsersTimerBean implements DanteUsersTimer {
private static final String defaultTrigger = "1 * * * * ?"; //every minute

@Logger private Log log;

private QuartzTriggerHandle handle;

private String trigger = defaultTrigger;

@Observer("org.jboss.seam.postInitialization")
public void start() throws Exception{
setTrigger(defaultTrigger);
}

public void restoreDefault(){
setTrigger(defaultTrigger);
}

public void setTrigger(String trigger){
try{
QuartzTriggerHandle handle = QuartzDispatcher.instance().scheduleTimedEvent("retrieveDanteUsers",
new CronSchedule((Long) null, trigger));

if (this.handle != null)
           this.handle.cancel();

this.handle = handle;
this.trigger = trigger;
}
catch (Exception e){
log.error("setTrigger(): #0", e, trigger);
}
}

public String getTrigger(){
return trigger;
}

public void cancel(){
try{
if (handle != null)
           handle.cancel();
handle = null;
trigger = null;
}
catch (Exception e){
log.error("cancel(): #0", e, trigger);
}
}

@Destroy
public void stop(){
cancel();
}
}




      DanteUsersRetriever.java


      package com.dai.dante_tscm.session.users;

import org.jboss.annotation.ejb.Local;


@Local
public interface DanteUsersRetriever {
     public void retrieve();
}



      DanteUsersRetrieverBean.java



      package com.dai.dante_tscm.session.users;

import javax.ejb.Stateless;

import org.jboss.seam.annotations.Logger;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Observer;
import org.jboss.seam.log.Log;

@Name("danteUsersRetriever")
@Stateless
public class DanteUsersRetrieverBean implements DanteUsersRetriever{
     @Logger private Log log;
     
     @Observer("retrieveDanteUsers")
     public void retrieve() {
          log.info("retrieve dante users");
          
     }

}










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