[rules-users] Drools Persistence Prob : No values going into 'VaraibleInstanceInfo' Table

[Bill Tarr]

Hi Pardeep,

I have gotten this functionality to work.

I am using SQL Server, but that is just a difference in the persistence.xml or datasource.  

You are seeing SessionInfo data, so your persistence is there, did you add this?

     <class>org.drools.persistence.processinstance.variabletypes.JPAPersistedVariable</class>

Here is the main points of my code.

    EntityManagerFactory emf = Persistence.createEntityManagerFactory("org.drools.persistence.jpa");
    env = KnowledgeBaseFactory.newEnvironment();
    env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
    VariablePersistenceStrategyFactory.getVariablePersistenceStrategy()
            .setPersister("javax.persistence.Entity",
                    "org.drools.persistence.processinstance.persisters.JPAVariablePersister");

    session = JPAKnowledgeService.newStatefulKnowledgeSession(knowledgeBase, null, env);
    KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(session, "log/claimsdemo");
    trackingProcessEventListener = new TrackingProcessEventListener();
    session.addEventListener(trackingProcessEventListener);

    Map<String, Object> parameterMap =
            new HashMap<String, Object>();
    parameterMap.put("claim", claim);
    processInstance = session.startProcess(CLAIM_FLOW, parameterMap);


Bill




________________________________
From: "Pardeep.Ruhil at lntinfotech.com" <Pardeep.Ruhil at lntinfotech.com>
To: rules-users at lists.jboss.org
Sent: Thu, October 29, 2009 5:56:18 AM
Subject: [rules-users] Drools Persistence Prob : No values going into 'VaraibleInstanceInfo' Table


Hi, 

I am working on persisting Drools session info into the database. 
For that I have taken a sample project from 
http://blog.athico.com/2009/09/drools-flow-variable-persistence.html.
When I tried to debug the project, no values are inserted into the table 'VaraibleInstanceInfo' table. 
However In between the debugging I am able to see data going into the table 'SessionInfo' , 'ProcessInstaceInfo', WorkItemInfo' table. But no data is going into the 'VaraibleInstanceInfo' and 'ProcessInstanceEventInfo' table. 

I have taken the code for VariableInstanceInfo.java, SerializablePersistedVariable.java,  JPAPersistedVariable.java  and other required classes for running the project from  http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-persistence-jpa/src/main/java/org/drools/persistence/processinstance/ 

Kindly tell me what going wrong in this. I am using Mysql database for persistence storage. 
 

Thanks & Regards

Pardeep Ruhil
L&T Infotech Ltd
Mumbai
Ph: +919820283884

Larsen & Toubro Infotech Ltd.
www.Lntinfotech.com

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