1 Reply Latest reply on Jul 21, 2011 8:11 PM by Gary Struthers

    Process variables, rules, Gateway constraints

    Gary Struthers Newbie

      I followed Accessing process variables in rule-task http://community.jboss.org/message/607839#607839

      But I'm starting a new thread because I have new problems and that thread was marked as answered.

      I'm missing something important about how to handle variables in rules and constraints but I can't find it.

       

      A JUnit4 test fails when I call fireAllRules()

      org.drools.RuntimeDroolsException: Unexpected exception executing action org.jbpm.process.instance.event.DefaultSignalManager$SignalAction@3e4ac866

                at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1000)

                at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:733)

                at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:702)

                at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218)

       

        @Test

                public void assignApplication() throws Exception {

        // given

                          StatefulKnowledgeSession kSession = createKnowledgeSession(getKbase());

                          String ready = new String("false");

                          String assignLHS = new String("true");

                          Map<String, Object> params = new HashMap<String, Object>();

                          params.put("ready", ready);

                          params.put("assignLHS", assignLHS);

                          ProcessInstance pi = kSession.startProcess("dummy", params);

                          this.assertNodeTriggered(pi.getId(), "Start","AddPiFact", "Assign Application");

                          kSession.fireAllRules();

       

      AddPiFact is a script immediately after Start with this action:

      import org.drools.runtime.KnowledgeContext

      import org.drools.runtime.KnowledgeRuntime

       

      kcontext.getKnowledgeRuntime().insert(kcontext.getProcessInstance());

       

      The rule is supposed to set "ready" if "assignLHS" is true

      import org.drools.runtime.process.WorkflowProcessInstance

       

      rule "applicationReady"

          ruleflow-group "assignApplication"

          when

              $process: WorkflowProcessInstance()

              $assignLHS :String() from (String)$process.getVariable("assignLHS");

              eval($assignLHS == "true");

          then

              $process.setVariable("ready", "true");

              update($process);

      end

       

      I want an XOR Gateway to use "ready" in its Constraints but if I write it like

      return ready.compareIgnoreCase("true");

       

      The KnowledgeBuilder has an error that "ready" can't be resolved.