Task nodes problem

[black83angel]

Hello,

I'm an italian developer approaching jBPM with NetBeans+GlassFish, and I'm encountering some problems in managing tasks and task nodes: I've created a process definition with a start-state, two task nodes (separated by a simple state I only use to check che flow) and a transition between the two (so I defined the tasks in the processdefinition.xml file). I was trying to get from the first task to the second by completing them, but I don't understand very well how to use the task management stuff.

I read that to obtain a task instance you have to call:

TaskInstance taskInstance = (TaskInstance) processInstance.getTaskMgmtInstance().getTaskInstances().iterator().next();

where "processInstance" is a process instance created from a process definition etc; but how must I do if I have more than one task?

[salaboy21]

If you know a little about Java, you should look the jBPM API and notice that

processInstance.getTaskMgmtInstance().getTaskInstances()

Give you the list (List) of all the task that you have at some moment.

Hope it helps

[kukeltje]

And this is only for one taskinstance. If you want it for all taskinstances, use the JbpmContext api

[black83angel]

"kukeltje" wrote:
And this is only for one taskinstance. If you want it for all taskinstances, use the JbpmContext api

Can you give me an example please?

[black83angel]

Ok, no problem: I think I just solved the matter following a simple example I found browsing the net; the example manages different tasks by creating different task instances:

Token token = processInstance.getRootToken();

<some code that brings the process to task-node 1>

TaskInstance t1 = (TaskInstance) processInstance.getTaskMgmtInstance().getTaskInstances().iterator().next();
t1.start();
 out.println("some feedback for task 1");
t1.end("task2");

token.signal();

TaskInstance t2 = (TaskInstance) processInstance.getTaskMgmtInstance().getUnfinishedTasks(token).iterator().next();
t2.start();
out.println("some fedback for task 2");
t2.end("end state");

I did not use the "getUnfinishedTasks(token)" function, now it seems to work: I assign actor to the task in a java class implementing AssignmentHandler.

If you don't mind, I have another question: on jBPM online documentation, cap 12 ("task management") I read that "Tasks can be defined in task-nodes and in the process-definition"; now I defined my task in the processdefinition.xml file:

<task-node name="task1">
 <task name="task1">
 <assignment class="task1HandlerClass" />
 </task>
 <transition name="follow" to="state2" />
</task-node>

...but what about if I want to define tasks following another way? The docs say that "task instance creation might be based upon a runtime calculation. In that case, add an ActionHandler on the nodeenter event of the task-node and set the attribute create-tasks=false."; so, I guess something like:

<task-node name="task1" create-tasks="false">
 <event type="node-enter">
 <action class="createTask1" name="task1" />
 </event>
</task-node>

Getting to the point, what is the meaning of the "create-tasks=false" attribute? And, how can I assign the handler to a task created in such way? Do I simply introduce an in the task node, as above?

Thanks...