Iterator in tasks-nodes

[pedrosacosta]

In this code,

while(processInstance.getTaskMgmtInstance().getUnfinishedTasks(processInstance.getRootToken())
 .iterator().hasNext())
 {
 ...

 System.out.println("ITERATION --> " + k);

 try
 {
 taskInstance = (TaskInstance) processInstance.getTaskMgmtInstance().getUnfinishedTasks(processInstance.getRootToken())
 .iterator().next();
 }
 catch(NoSuchElementException ex)
 {
 System.out.println("NOOOOOOOOOOOOOOOOOOOOOOOOO");
 }
 k++;

 }

i have associated 3 task-nodes sequentially. When i pass through them and i reach de last one, the program doesn't jump out of the while passing the hasNext, and i catch the exception. I don't understand why the hasNext doesn't work here.

Anybody can explain this?

Thanks

[pedrosacosta]

If i do
processInstance.getTaskMgmtInstance().getUnfinishedTasks(processInstance.getRootToken()).size();
i get 1 task instead of 3.

[pedrosacosta]

Why?

[kukeltje]

look at a 'token' as something that traverses the process (like petri-nets') So this token is always in just one node. If you exit that node it goes to the next (or splitting itself in case of forks)

Try reading the jBPM docs a little and look at the testcases you can see there what happens

[kukeltje]

Try this: does it make a difference?

Iterator myIt = processInstance.getTaskMgmtInstance().getUnfinishedTasks(processInstance.getRootToken()).iterator();
while(myIt.hasNext()) {

 ...

 System.out.println("ITERATION --> " + k);

 try {
 taskInstance = (TaskInstance) myIt.next();
 } catch(NoSuchElementException ex) {
 System.out.println("NOOOOOOOOOOOOOOOOOOOOOOOOO");
 }
 k++;
}

And btw? what is in the ..... A 'signal' or 'endtask' or something? I mean, do you do something somewhere with the tasks?

[pedrosacosta]

Yes, i do things with the task, but i didn't put the code here.

[pedrosacosta]

When i do the code like kukeltje says, i only get the first task, and right after that, the code jump off the while.

Where is my processdefinition.xml

<?xml version="1.0" encoding="UTF-8"?>

<process-definition name='simple'>
 <start-state name='start'>
 <transition name='to_registo_ocorrencia' to='registo_ocorrencia'/>
 </start-state>

 <!-- Tarefa 1 -->
 <task-node name='registo_ocorrencia'>
 <task name='RegistoOcorrenciaTask'>
 <controller>
 <variable name='data' access='read,required' mapped-name='data' />
 <variable name='hora' access='read,required' mapped-name='hora' />
 <variable name='local' access='read,required' mapped-name='local'/>
 <variable name='data_registo' access='read,required' mapped-name='data_registo'/>
 </controller>
 </task>
 <transition name='to_lista_tarefas' to='lista_tarefas'/>
 </task-node>

 <!-- Tarefa 2 -->
 <task-node name='lista_tarefas'>
 <task name='ListaTarefasTask'/>
 <transition name='to_notificacoes' to='notificacoes'></transition>
 </task-node>

 <!-- Tarefa 3 -->
 <task-node name='notificacoes'>
 <task name='NotificacoesTask'>
 </task>
 <transition name='to_end' to='end'>
 <!-- <action name='action' class='com.samples.action.GravarOcorrenciaHandler'></action> -->
 </transition>
 </task-node>

 <end-state name='end'></end-state>
</process-definition>

This xml code has some words in portuguese

[pedrosacosta]

Now i do another question, beside the first one. How can i get the total of task-node?

Thanks.