New subject: [jBPM] - Re: Map based persistence doubt

Monday, 27 August 2012

Christian Marmolejo [https://community.jboss.org/people/chrismarm] created the discussion

"Map based persistence doubt"

To view the discussion, visit: https://community.jboss.org/message/756068#756068

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Hi everyone

In my current project I need to persist active processes on demand before application
shutdown and reload them at a later time. For simplicity, persistence should use binary
files to store serialized process and session information, so databases are not intended
to be used. In this scenario I think that a map based persistence solution might be
appropiate.

I have found very little info about jBPM persistence in general and even less about map
based persistence, so I have tried to understand the test cases in source code with no
success. I added a test case in MapPersistenceTest.java for a very simple process: Start
--> Script --> EventNode --> Script --> EventNode --> Script --> End.
Scripts are only used to print out some "debug" info. The code is (class
MapBasedPersistenceTest.java has no changes):

    @Test
    public void fullCustomTest()
    {
        String processId = "com.telvent.prueba";
        String eventType = "PrimeraSenal";
        String eventType2 = "SegundaSenal";

        KnowledgeBase kbase = createKBase();
        StatefulKnowledgeSession crmPersistentSession = createSession(kbase);

        org.drools.runtime.process.ProcessInstance process =
crmPersistentSession.startProcess(processId);
        long processInstanceId = process.getId();
        Assert.assertEquals(ProcessInstance.STATE_ACTIVE, process.getState()); 

        crmPersistentSession.signalEvent(eventType, null);
        process = crmPersistentSession.getProcessInstance(processInstanceId);
        Assert.assertNotNull(process); 

        int sessionId = crmPersistentSession.getId();
        StatefulKnowledgeSession crmPersistentSession2 =
disposeAndReloadSession(crmPersistentSession, sessionId, kbase);
        crmPersistentSession2.signalEvent(eventType2, null); 

        process = crmPersistentSession2.getProcessInstance(processInstanceId);
        Assert.assertNull(process);
    }

    private KnowledgeBase createKBase()
    {
        KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();

kbuilder.add(ResourceFactory.newClassPathResource("com/telvent/SampleProcess.bpmn"),
ResourceType.BPMN2);  
        KnowledgeBase kbase = kbuilder.newKnowledgeBase();
        return kbase;
    }

After the first signalEvent, the second script is executed properly but after reloading
the session and firing the second signal, I expected the last script to be fired and the
process finished. However, the last script isn't reached and the second assert fails
as the process still waits for the first signal, not the second one. Could anyone explain
what I am doing wrong?

Thanks in advance
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[jBPM] - Map based persistence doubt