I have a very straightforward jBPM prototype where I am using hibernate,and
tomcat abd SQL Server database.
I get this error sometimes on the second invocation of the same ActionHandler
within a graph. I'm just prototyping now. My action handler just makes an
update to a text field in the database depending on the object that is passed
into the aciton handler.
I'm reading about timers and right now I am not using a timer in the prototype.
I'd almost like to disable them or do something within the action handler to
make sure they are not causing this exception do I can continue with the
developmetn of my prototype.
The exception comes after the third processInstance.signal() that would take
the process to transition to the thrird node in the graph (counting the start
node).
The graph is below:
public static ProcessDefinition getTaskProcessDefinition() {
JbpmConfiguration jbpmConfiguration = null;
ProcessDefinition processDefinition = null;
try{
processDefinition =
ProcessDefinition.parseXmlString("<process-definition
name='processManualTask'>"
+ " <start-state name='start'>"
+ " "
+ " </start-state>"
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " "
+ " <end-state name='End' />"
+ "</process-definition>");
} catch(Exception e) {e.printStackTrace();
}
try{
HttpSession sess = FrameworkServices.instance().getSession();
JbpmContext jbpmContext = (JbpmContext) sess.getAttribute("jbpmctx");
if (jbpmContext == null) {
jbpmConfiguration = JbpmConfiguration.getInstance();
jbpmContext = jbpmConfiguration.createJbpmContext();
sess.setAttribute("jbpmctx", jbpmContext);
}
System.out.println("saving process instance");
ProcessDefinition definition =
processDefinition.createNewProcessDefinition();
ProcessInstance processInstance = definition.createProcessInstance();
jbpmContext.save(processInstance);
Session session = (Session) sess.getAttribute("hibsess");
session.flush();
System.out.println("process instance saved!!!!");
}catch(Exception e) {e.printStackTrace();
}
return processDefinition;
}
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