Query on remaining task

[freak182]

Hello,

I have to display the next possible task aside from the current task in the task instance.

here is the scenario:

I have a process definition compose of 5 task: A, B, C, D, E
Now, I started the process then the current task is A and it is in taskinstance table. Now when the user process task A, A now is in completed stated while task B is in on_progress state. both task A and B now in taskinstance table for specified process instance.

Now problem is how can I display the next possible not completed task. In this case B (still on on_progress state), C, D, E.

version used: jbpm 3.2.5

Thanks a lot.
Cheers.

[kukeltje]

Display where? In the tasklist? Or the taskform of this task? Or.....?

[freak182]

Hello,

Sorry, just wanted to have the list of all possible task.

Thanks a lot.
Cheers.

[eechenjie]

Try TaskQuery, it may be useful to you

[kukeltje]

all non-completed but started tasks are in the console. You *might* need to use the refresh button though

[freak182]

Hello,

Just wanted to share how I accomplished this query. although it is not, let say hibernate way or jbpm way, but it work.

@SuppressWarnings("unchecked")
 public List<Task> findNextTasksByProcessInstance(final ProcessInstance process)
 {
 try {
 return (List<Task>) jbpmTemplate.execute(new JbpmCallback() {

 public Object doInJbpm(JbpmContext context)
 throws JbpmException {

 final long processDefId = process.getProcessDefinition().getId();

 final GraphSession sess = context.getGraphSession();
 final ProcessDefinition def = sess.getProcessDefinition(processDefId);
 final Map<String, Task> task = def.getTaskMgmtDefinition().getTasks();
 final Set<String> taskSet = task.keySet();

 final Session session = context.getSession();
 final Query query = session.getNamedQuery("findNextTasksByProcessInstance");
 query.setEntity("processInstance", process);
 final List<String> taskInstance = query.list();

 return JbpmEngineUtils.getNextTasks(taskSet, taskInstance, task);
 }
 });
 } catch (Exception e) {
 throw new CCTIException("No task instance get", e);
 }
 }

then subtract the activeTask from possibletask:

public static List<String> getNextTasks(Set<String> possibleTask,List<String> completedTask,Map<String,Task> task)
 {
 final List<String> nextTasks = new ArrayList<String>();

 final Set<String> tmpPossibleTask = new HashSet<String>(possibleTask);
 final List<String> tmpActiveTask = new ArrayList<String>(completedTask);
 final Map<String, Task> mapTask = new HashMap<String, Task>(task);

 for(String s : tmpActiveTask)
 {
 if ( tmpPossibleTask.contains(s) )
 {
 tmpPossibleTask.remove(s);
 }
 }
 Iterator<String> ite = tmpPossibleTask.iterator();
 while (ite.hasNext()) {
 final String string = ite.next();
 final Task taskLeft = mapTask.get(string);
 nextTasks.add(taskLeft.getDescription());
 }
 return nextTasks;
 }