Unassign Task

[damianharvey]

I was searching for a way to return a task to the pooled tasks (ie. unassign it).

This works for me and others may find it useful:

jbpmContext.getTaskMgmtSession().loadTaskInstance(taskId).setActorId(null);

where taskId is the id (type long) passed into the method via a request parameter.

Would be handy if you could call setActor on the taskInstance returned from the taskInstanceList but it returns org.jbpm.taskmgmt.exe.TaskInstance which as it isn't a Seam component, can't be called from EL. Would be super-handy if you could just call task.unassign()

[norman.richards]

Have you tried the new extended EL in Seam 2? I'd be quite surprised if you couldn't call the method you want.

[gavin.king]

#{pooledTask.assign(null)} should work I guess.

But even better, let's add a PooledTask.unassign() method.

[damianharvey]

I had tried #{pooledTask.assign(null)} but the task just disappeared from both lists as it sets the ACTORID column in the JBPM_TASKINSTANCE table to blank rather than NULL.

I've noticed that you can't pass null using EL. It gets sent to the Bean as an empty string.

[gavin.king]

Then please report that EL issue in Seam JIRA so that we can fix it. null!="" ;-)

[torsty]

Don't know if I got you, but you said you did want

to return a task to the pooled tasks

I am assigning a task back to a (named) pool like this. (this is reassigning a task to a pool - but not unassigning the task completly):

 public void reassignToPool()
 {
 Long taskIdLong = new Long( this.taskId); // Your taskId
 PooledActor myPoolActor = new PooledActor("myPoolActorName");
 Set<PooledActor> pool = new HashSet<PooledActor>();
 pool.add(myPoolActor);
 if ( taskId != null )
 {
 jbpmContext.getTaskMgmtSession().loadTaskInstance(taskIdLong.longValue()).setPooledActors( pool ) ;
 jbpmContext.getTaskMgmtSession().loadTaskInstance(taskIdLong.longValue()).setActorId( null ) ;
 }
 else
 {
 //
 }
 }

[damianharvey]

If you had assigned the task to the 'myPoolActorName' in the first place you only need set the actorId to null to return it.

Issue raised over the EL null thing : http://jira.jboss.com/jira/browse/JBSEAM-1737

Thanks,

Damian.