Can't create a process instance when processDefinition is nu

[milochanzy]

Hi,

I have a sub-process invoked by a main process. I am using Eclipse for running the application. What I have done is started the jBPM server and deployed the main and sub processes using the 'deployment' tab of the processdefinition.xml. I am creating the instance of the main process. It runs to the point where the next node is a process-state whose sub-process is defined. I am getting following error:

org.jbpm.JbpmException: can't create a process instance when processDefinition is null
at org.jbpm.graph.exe.ProcessInstance.<init>(ProcessInstance.java:128)
at org.jbpm.graph.exe.ProcessInstance.<init>(ProcessInstance.java:92)
at org.jbpm.graph.exe.Token.createSubProcessInstance(Token.java:624)
at org.jbpm.graph.node.ProcessState.execute(ProcessState.java:164)
at org.jbpm.graph.def.Node.enter(Node.java:319)
at org.jbpm.graph.def.Transition.take(Transition.java:151)
at org.jbpm.graph.def.Node.leave(Node.java:394)
at org.jbpm.graph.exe.ExecutionContext.leaveNode(ExecutionContext.java:136)
at org.jbpm.graph.node.Decision.execute(Decision.java:152)
at org.jbpm.graph.def.Node.enter(Node.java:319)
at org.jbpm.graph.def.Transition.take(Transition.java:151)
at org.jbpm.graph.def.Node.leave(Node.java:394)
at org.jbpm.graph.def.Node.leave(Node.java:358)
at org.jbpm.graph.exe.ExecutionContext.leaveNode(ExecutionContext.java:120)

Following are the code parts:

main process: ( not the exact code, but sumarizes all I have done)

String temp = content of main processdefinition.xml;
ProcessDefinition main = ProcessDefinition.parseXmlString(temp);
ProcessInstance processInstance = new ProcessInstance(processDefinition);
while(processInstance.hasEnded() == false) {
 processInstance.signal();
}

[milochanzy]

Correction in code:

String temp = content of main processdefinition.xml;
ProcessDefinition main = ProcessDefinition.parseXmlString(temp);
ProcessInstance processInstance = new ProcessInstance(main);
while(processInstance.hasEnded() == false) {
 processInstance.signal();
}

[salaboy21]

that's a crazy code man!.. i recommed to you to look a good example of process/subprocess interaction...

When i do this .. i try to deploy first the subprocess then i user process-state with name reference only!

[milochanzy]

Thanks for reply..
Found the solution:

I had to declare the subProcess definition in the ProcessState for the same:

Like

 ProcessDefinition processDefinitionSubProcess = ProcessDefinition.
 parseXmlString("sub-process definition xml content");
 ProcessState processState = (ProcessState) processDefinition.getNode
 ("Sub_Process_Name");
 processState.setSubProcessDefinition(processDefinitionSubProcess);