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:
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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