[jbpm-dev] Help with Signal Start Event

[Federico Feller]

Thanks Kris!
I saw this was fixed already :)
https://github.com/droolsjbpm/jbpm/commit/b1dbe63b7b41ae719a1840020ba8ab96ed140cc3
Unfortunately, now I'm having some issues when saving the knowledge
base: StartProcessEventListener is required to be serialized, (and if I do
declare it as Serializable, then ProcessRuntimeImpl is also required to be
serialized)
I think the problem is that the knowledge base is trying to serialize the
new listener added in line 201 of ProcessRuntimeImpl.java
Do you think there's a way to skip that listener from being serialized?

Thanks!

On Mon, May 16, 2011 at 11:12 PM, Kris Verlaenen <kverlaen at redhat.com>wrote:

> Thanks, this indeed seems to be an issue with dynamically loading this
> process to the knowledge base.
> I've create a JIRA issue for this and will look at fixing this:
> https://issues.jboss.org/browse/JBPM-3197
>
> Kris
>
> Federico Feller wrote:
>
>> Hi All,
>>
>> I need some help with the signal start event of bpmn2
>> It seems that the signal start event doesn't work  when a process
>> definition is added to a knowledge base of an already created session.
>> I have slightly modified the testSignalStart() unit test of
>> SimpleBPMNProcessTest.java to reproduce the problem
>> Firstly, I've added a new process definition named
>> BPMN2-SignalStart2.bpmn2, based on the original BPMN2-SignalStart.bpmn2,
>> just renaming the signal name from MySignalStart to MySignalStart2 and
>> renaming the process id from Minimal to Minimal2
>>
>> The following test runs without any problem, since both process
>> definitions are added before the session is created
>>
>> public void testSignalStart() throws Exception {
>>        KnowledgeBase kbase =
>> createKnowledgeBase("BPMN2-SignalStart.bpmn2");
>>        KnowledgeBase kbase2 =
>> createKnowledgeBase("BPMN2-SignalStart2.bpmn2");
>>        kbase.addKnowledgePackages(kbase2.getKnowledgePackages());
>>        StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
>> final List<Long> list = new ArrayList<Long>();
>> ksession.addEventListener(new DefaultProcessEventListener() {
>> public void afterProcessStarted(ProcessStartedEvent event) {
>> list.add(event.getProcessInstance().getId());
>> }
>> });
>> ksession.signalEvent("MyStartSignal", "NewValue");
>>        ksession.signalEvent("MyStartSignal2", "NewValue");
>> assertEquals(2, list.size());
>>    }
>>
>> However, the following test fail to run, as the process Minimal2 is never
>> started when doing ksession.signalEvent("MyStartSignal2", "NewValue");
>> If I start the process directly using  ksession.startProcess("Minimal2")
>> then the test passes.
>>    public void testSignalStart2() throws Exception {
>>        KnowledgeBase kbase =
>> createKnowledgeBase("BPMN2-SignalStart.bpmn2");
>>        KnowledgeBase kbase2 =
>> createKnowledgeBase("BPMN2-SignalStart2.bpmn2");
>>                StatefulKnowledgeSession ksession =
>> createKnowledgeSession(kbase);
>>
>>  ksession.getKnowledgeBase().addKnowledgePackages(kbase2.getKnowledgePackages());
>> final List<Long> list = new ArrayList<Long>();
>> ksession.addEventListener(new DefaultProcessEventListener() {
>> public void afterProcessStarted(ProcessStartedEvent event) {
>> list.add(event.getProcessInstance().getId());
>> }
>> });
>> ksession.signalEvent("MyStartSignal", "NewValue");
>>                ksession.signalEvent("MyStartSignal2", "NewValue");
>> //ksession.startProcess("Minimal2");
>> assertEquals(2, list.size());
>>    }
>>
>> I found some clues on why this is happening.
>> The first test works because, when the session is created, the method
>> ProcessRuntimeImpl::initProcessEventListeners() is invoked, and the event
>> listeners are properly initialized
>> But in the second test, the event listeners are not initialized since
>> adding a package does not reinitialize the session.
>> Any ideas on where I can start looking to fix this? or any workaround?
>>
>>  Thanks!
>>
>> Federico
>>
>> ------------------------------------------------------------------------
>>
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>>
>>
>
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