AssignmentHandler for groups

[gwittwer]

Hello

I'm working on the AssignmentHandler for my webapp.
I took the ExpressionAssignmentHandler from the jbpm.identity module and changed the resolveTerm stuff to my requirements.

If I use for e.g. the expression user(James Bond) the execution and assignment works great.
But if I use expression group(Agent) the assignment is null.
I added some log-information to the ExpressionHandler:

18:57:24,779 DEBUG [TaskBean] Save and Close button pushed
18:57:24,781 DEBUG [GraphElement] event 'task-end' on 'Task(Pflichtenheft erstellen)' for 'Token(/)'
18:57:24,815 DEBUG [TaskInstance] completion of task 'Pflichtenheft erstellen' results in taking the default transition
18:57:24,825 DEBUG [GraphElement] event 'before-signal' on 'TaskNode(Pflichtenheft erstellen)' for 'Token(/)'
18:57:24,826 DEBUG [GraphElement] event 'node-leave' on 'TaskNode(Pflichtenheft erstellen)' for 'Token(/)'
18:57:24,827 DEBUG [GraphElement] event 'transition' on 'Transition(d6ea97)' for 'Token(/)'
18:57:24,829 DEBUG [GraphElement] event 'node-enter' on 'TaskNode(Pflichtenheft Abnahme)' for 'Token(/)'
18:57:24,865 DEBUG [ExpressionAssignmentHandler] assign called
18:57:24,866 DEBUG [ExpressionAssignmentHandler] resolving first term 'group(Agent)'
18:57:24,867 DEBUG [ExpressionAssignmentHandler] assignment groupName: Agent
18:57:24,867 DEBUG [ExpressionAssignmentHandler] get group by name: Projektbeteiligten
18:57:24,879 DEBUG [ExpressionAssignmentHandler] assignment entityname: Agent
18:57:24,880 DEBUG [ExpressionAssignmentHandler] entity is type of group: Agent
18:57:24,881 DEBUG [GraphElement] event 'task-assign' on 'Task(Pflichtenheft Abnahme)' for 'Token(/)'
18:57:24,884 DEBUG [GraphElement] event 'task-create' on 'Task(Pflichtenheft Abnahme)' for 'Token(/)'
18:57:24,884 DEBUG [GraphElement] event 'after-signal' on 'TaskNode(Pflichtenheft erstellen)' for 'Token(/)'
18:57:24,885 DEBUG [TaskBean] assignmentlogs: [task-assign[null,org.jbpm.taskmgmt.exe.TaskInstance@6991d8]]

The group and all members exists and could be resolved.
Just the assignment for the pooledActors doesn't work.

Code section in AssignmentHandler:

} else if (entity instanceof Group) {
 // put the group in the pool
 log.debug("entity is type of group: " + entity.getName());
 assignable.setPooledActors(new String[]{entity.getName()});
 //assignable.setActorId(Long.toString(entity.getId()));
 }

Why doesn't it work??

Thank you for your help. I searched the forum and found different posts, but none helped me.

Regards Gerhard

[gwittwer]

Oh sorry, I did a mistake in the published log. I changed the group "Projektbeteiligte" to "Agent" and forgot one. Please ignore this mistake!

[ashkumar]

Hi Firstly, the following Jira issue has to be resolved.
http://jira.jboss.com/jira/browse/JBPM-429
This will allow you to specify your own Assignment handler in Process definition file.

my assign method in the assignmentHandler looks like follows.

----------------------
}else if (entity instanceof Group) {

// put the group in the pool


SpectrumAssignmentHandler assignmentHandler =
new SpectrumAssignmentHandler ();

SpectrumIdentitySession iSession = (SpectrumIdentitySession)assignmentHandler.getExpressionSession();

//Get all the Groups to which user belongs

Group group = iSession.getGroupByName(entity.getName());

Set users = group.getUsers();

Iterator it = users.iterator();

Set userNames =
new HashSet();

while (it.hasNext()) {

User tempUser = (User) it.next();

userNames.add(
new PooledActor(tempUser.getName()));

}

assignable.setPooledActors(userNames);
--------------------------------

Notice that I overloaded setPooledActors to accept ArrayList instead of String[]

Basically, here is an opportunity for you to be as creative as possible.
All the best !