Re: [rules-users] cannot retrieve timerId from timerInstance - Bug?

Hi Kris! Thanks for your reply! Ok, I can retrieve the correct timer Ids now using getID(). But now I'm running into an exception when I try to cancel the timer nodes. I cannot use "drools.getWorkingMemory().getTimerManager().getTimerService().shutdown();", because The shutdown method closes the knowledgeSession. Maybe I should mention what I am trying to do: I have several processes running. Each process has severel subflows which have, in turn, timer nodes so that they are periodically triggered. The subflows are interacting with databases, so I want to ensure a secure shutdown (event driven). Therefore it is necessary to cancel the timers, so that there is no new invocation of the subflows. On the other hand the subflows have to finish their work, so using Timerservice.shutdown() is not possible! When I try to cancel the timers in the following way (action node (Drools5.1)): Collection<TimerInstance> coll = drools.getWorkingMemory().getTimerManager().getTimers(); for(TimerInstance ti : coll) { drools.getWorkingMemory().getTimerManager().cancelTimer(ti.getId()); } The following exception occurs: Exception in thread "Thread-1" java.lang.RuntimeException: unable to execute Action at org.drools.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionN odeInstance.java:56) at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl. java:112) at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeIns tanceImpl.java:148) at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInst anceImpl.java:135) at org.drools.workflow.instance.node.EventNodeInstance.triggerCompleted(EventNo deInstance.java:70) at org.drools.workflow.instance.node.EventNodeInstance.internalTrigger(EventNod eInstance.java:62) at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl. java:112) at org.drools.workflow.instance.node.EventNodeInstance.signalEvent(EventNodeIns tance.java:50) at org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(Wo rkflowProcessInstanceImpl.java:272) at org.drools.process.instance.event.DefaultSignalManager.signalEvent(DefaultSi gnalManager.java:58) at org.drools.impl.StatefulKnowledgeSessionImpl.signalEvent(StatefulKnowledgeSe ssionImpl.java:281) at test.Shutdown.run(Shutdown.java:46) Caused by: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap.java:787) at java.util.HashMap$ValueIterator.next(HashMap.java:817) at com.sample.Process_com_sample_0.action2(Process_com_sample_0.java:28) at com.sample.Process_com_sample_0Action2Invoker.execute(Process_com_sample_0Ac tion2Invoker.java:20) at org.drools.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionN odeInstance.java:54) ... 11 more -----Ursprüngliche Nachricht----- Von: Kris Verlaenen [mailto:kris.verlaenen@cs.kuleuven.be] Gesendet: Dienstag, 13. Oktober 2009 04:20 An: Rules Users List; tom238(a)gmx.at Cc: rules-users(a)lists.jboss.org Betreff: Re: [rules-users] cannot retrieve timerId from timerInstance - Bug? You probably need to use the timer instance id, not the timer id (as this one is only used to differentiate between timers if you have more than one timer defined on the same node and you want to link different actions to each of these timers). So could it be as simple as using ti.getId() instead of ti.getTimerId() ? Kris Quoting tom238(a)gmx.at: Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm