[jboss-user] [jBPM] - Using multiple kSessions

[Richard Evans]

Richard Evans [https://community.jboss.org/people/r3vans] created the discussion

"Using multiple kSessions"

To view the discussion, visit: https://community.jboss.org/message/744551#744551

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I have not been able to get multiple sessions working properly:

* I declare multiple sessions in the spring context (see below).
* I start a pool of threads. As each thread is executed I grab session and save it in a ThreadLocal.
* I despatch calls to kSession.startProcess in each thread.

Is this a reasonable approach?

I find that this will run OK for a while but ultimately will fail either with an NPE in ProcessInstanceImpl getProcess because kruntime is null OR will fail to commit a transaction because it has already been committed.

Regards,
Richard





<drools:ksession id="kSession1" type="stateful" kbase="kBase">
    <drools:configuration>
        <drools:work-item-handlers>
            <!-- Process : ServiceNowCMDB CreateCI -->
            <drools:work-item-handler name="ServiceNowCmdbMapperST" ref="ServiceNowCmdbMapperHandler"/>
            ...etc

        </drools:work-item-handlers>
        <!-- jBPM Persistence -->
        <drools:jpa-persistence>
            <drools:transaction-manager ref="transactionManager" />
            <drools:entity-manager-factory ref="entityManagerFactory" />   
        </drools:jpa-persistence>
    </drools:configuration>
</drools:ksession>

<drools:ksession id="kSession2" type="stateful" kbase="kBase">
    <drools:configuration>
        <drools:work-item-handlers>
            <!-- Process : ServiceNowCMDB CreateCI -->
            <drools:work-item-handler name="ServiceNowCmdbMapperST" ref="ServiceNowCmdbMapperHandler"/>
            ...etc

        </drools:work-item-handlers>
        <!-- jBPM Persistence -->
        <drools:jpa-persistence>
            <drools:transaction-manager ref="transactionManager" />
            <drools:entity-manager-factory ref="entityManagerFactory" />   
        </drools:jpa-persistence>
    </drools:configuration>
</drools:ksession>
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