Process migration example with WorkflowProcessInstanceUpgrader in jBPM 5

Solution Unverified - Updated -

Environment

  • Red Hat JBoss BRMS (BRMS)
    • 5.3.1

Issue

  • How to migrate a process instance to a new process definition? I'm following http://docs.jboss.org/jbpm/v5.0/userguide/ch03.html#d0e1305 "section: 3.9.1. Process instance migration" but I gets NullPointerException
2014-11-03 09:28:10,956 ERROR [xxx.xxx.MyService] (Thread-11 (HornetQ-client-global-threads-563335366)) StackTrace: java.lang.NullPointerException
        at org.jbpm.process.instance.impl.ProcessInstanceImpl.getProcess(ProcessInstanceImpl.java:67)
        at org.jbpm.workflow.instance.WorkflowProcessInstanceUpgrader.upgradeProcessInstance(WorkflowProcessInstanceUpgrader.java:57)
        at xxx.xxx.MyService.upgradeProcessInstances(MyService.java:392)
...

Resolution

Attached jbpmex91_process_migration.zip as an example.

For advanced cases, another article Is it possible to upgrade a jBPM5 process to the target process's sub-process node using WorkflowProcessInstanceUpgrader.upgradeProcessInstance(..) ? would be helpful.

You need to use a command to avoid the NullPointerException. See Why does ProcessInstance throw an NPE on invocation of its method in jBPM5 ?

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