[jboss-user] [jBPM Users] - task & timers

[jbosspnet]

Hi.
I am using Jbpm 3.2.3 on Jboss 4.2.3.GA. 
I have many processes where I have to check a condition in a manually or in a automatic way and the check have to be completed into a time range. 
For this target, I use the following task-node:

  | 	<task-node name="check" create-tasks="false" end-tasks="true">
  | 		<event type="node-enter">
  | 			<action class="org.process.StartCheck"></action>
  | 		</event>
  | 		<event type="node-leave">
  | 			<action class="org.process.DefaultEnd"></action>
  | 		</event>
  | 		
  | 		<timer name="check" duedate="2 seconds" repeat="4 seconds">
  | 			<action class="org.process.CheckTimer"></action>
  | 		</timer>		
  | 		
  | 		<task name="check-manual">
  | 			<event type="task-start">
  | 				<action class="org.process.DefaultStart"></action>
  | 			</event>
  | 			<event type="task-end">
  | 				<action class="org.process.DefaultEnd"></action>
  | 			</event>
  | 		</task>
  | 		
  | 		<task name="check-automatic">
  | 			<event type="task-start">
  | 				<action class="org.process.DefaultStart"></action>
  | 			</event>
  | 			<event type="task-end">
  | 				<action class="org.process.DefaultEnd"></action>
  | 			</event>
  | 			
  | 			<timer name="check-automatic" duedate="2 seconds" repeat="2 seconds">
  | 				<action class="org.process.AutomaticCheck"></action>
  | 			</timer>
  | 		</task>				
  | 			
  | 		<transition to="notify success" name="OK"></transition>
  | 		<transition to="notify failure" name="KO"></transition>
  | 	</task-node>
  | 

The manual check (first task) uses a form where the user manually clicks on OK/KO buttons.
Automatic check (second task) is performed with a class in the timer action that executes a query on a database and signal to the corret OK/KO transition. 

To the events node-leave, node-enter, task-start and task-end are associated classes (DefaultStart and DefaultEnd) to trace the execution.

StartCheck creates the correct task (from a configuration parameter):

  | 	public abstract class StartCheck implements ActionHandler {
  | 		@Override
  | 		public void execute(ExecutionContext executionContext) throws Exception {
  | 			// get check type (manual or automatic)
  | 			// checkType = ...
  | 				
  | 			// get the task-name from the check type (check-manual or check-automatic)
  | 			// taskName = ...
  | 			
  | 			// create task instance
  | 			TaskNode taskNode = (TaskNode) executionContext.getNode();
  | 			
  | 			Task task = taskNode.getTask(taskName);
  | 			
  | 			Token token = executionContext.getToken();
  | 			
  | 			TaskMgmtInstance tmi = executionContext.getTaskMgmtInstance();
  | 			  
  | 			TaskInstance taskInstance = tmi.createTaskInstance(task, token);
  | 			
  | 			taskInstance.start();			
  | 		}
  | 	}
  | 

CheckTimer notifies if the check is over:

  | 	public abstract class CheckTimer implements ActionHandler {
  | 		@Override
  | 		public void execute(ExecutionContext executionContext) throws Exception {
  | 			// get time range (startDate and endDate) from configuration parameters
  | 			
  | 			// checks that new Date() is in the range (startDate, endDate) 
  | 			
  | 			// notify user
  | 		}
  | 	}
  | 

AutomaticCheck executes the automatic check:

  | 	public abstract class AutomaticCheckAction implements ActionHandler {
  | 		@Override
  | 		public void execute(ExecutionContext executionContext) throws Exception {
  | 			// isOK is setted after a query on a database
  | 			boolean isOK = ...
  | 			
  | 			Token token = executionContext.getToken();
  | 			token.signal(isOK ? "OK" : "KO");
  | 		}
  | 	}
  | 
	
When the execution enters in this node, the task creation is correct and also the task-node timer is created. 
If the check type is manual then the execution stops in the check-manual task and with the form we can select the OK/KO transition.
But if the check type is automatic, the timer associated with the check-automatic task is never created (in the JBPM_JOB table I find only the row that refers to the task-node timer) and the execution stops in this task forever due to the non-execution of the AutomaticCheck action.

Why the "check-automatic" task timer is not created?

Regards.


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