0 Replies Latest reply on Aug 22, 2008 9:28 AM by Walter Taus

    implications of a node

    Walter Taus Newbie

      Hallo,
      I am using jBPM in a database environment. I have the following process definition

      <?xml version="1.0" encoding="UTF-8"?>
      <process-definition xmlns="" name="TestFork">
      <start-state name="StartState1219404587924">
      <transition to="StartDecision1219404587924/StartDecision1219404587924"></transition>
      </start-state>
      <super-state name="StartDecision1219404587924">
      <decision name="StartDecision1219404587924">
      <transition name="To_R9v0MGIXEd2c76EEAkhdWA" to="../Fork1/Fork1">
      </transition>
      </decision>
      </super-state>
      <super-state name="Fork1">
      <fork name="Fork1">
      <transition name="To_1k7IQHAeEd2zyONQHdQlYg" to="../State1/State1">
      </transition>
      <transition name="To_atT-cGReEd2afZhBo4aBRw" to="../State2/State2">
      </transition>
      </fork>
      <join name="Join1">
      <event type="node-enter">
      <script><expression>
      executionContext.setDiscriminator(true);
      </expression></script></event>
      <transition name="End" to="../End/End"></transition>
      </join>
      </super-state>
      <super-state name="State1">
      <state name="State1">
      <transition name="To_QPWKwGReEd2afZhBo4aBRwJoin" to="../Fork1/Join1">
      </transition>
      </state>
      </super-state>
      <super-state name="State2">
      <state name="State2">
      <transition name="To_QPWKwGReEd2afZhBo4aBRwJoin" to="../Fork1/Join1">
      </transition>
      </state>
      </super-state>
      <super-state name="End">
      <end-state name="End">
      </end-state>
      </super-state>
      </process-definition>
      

      When I run this process past the fork, I correctly have two child tokens, one for State1 and one for State2.

      Now I add a node in front of the fork. My process definition now looks as follows.
      <?xml version="1.0" encoding="UTF-8"?>
      <process-definition xmlns="" name="TestFork">
      <start-state name="StartState1219404587924">
      <transition to="StartDecision1219404587924/StartDecision1219404587924"></transition>
      </start-state>
      <super-state name="StartDecision1219404587924">
      <decision name="StartDecision1219404587924">
      <transition name="To_R9v0MGIXEd2c76EEAkhdWA" to="../Node1/Node1">
      </transition>
      </decision>
      </super-state>
      <super-state name="Node1">
      <node name="Node1">
      <event type="node-enter">
      <script><expression>
      System.out.println("Node1 entered");
      executionContext.leaveNode();
      </expression></script></event>
      <transition name="To_QPWKwGReEd2afZhBo4aBRw" to="../Fork1/Fork1">
      </transition>
      </node>
      </super-state>
      <super-state name="Fork1">
      <fork name="Fork1">
      <transition name="To_1k7IQHAeEd2zyONQHdQlYg" to="../State1/State1">
      </transition>
      <transition name="To_atT-cGReEd2afZhBo4aBRw" to="../State2/State2">
      </transition>
      </fork>
      <join name="Join1">
      <event type="node-enter">
      <script><expression>
      executionContext.setDiscriminator(true);
      </expression></script></event>
      <transition name="End" to="../End/End"></transition>
      </join>
      </super-state>
      <super-state name="State1">
      <state name="State1">
      <transition name="To_QPWKwGReEd2afZhBo4aBRwJoin" to="../Fork1/Join1">
      </transition>
      </state>
      </super-state>
      <super-state name="State2">
      <state name="State2">
      <transition name="To_QPWKwGReEd2afZhBo4aBRwJoin" to="../Fork1/Join1">
      </transition>
      </state>
      </super-state>
      <super-state name="End">
      <end-state name="End">
      </end-state>
      </super-state>
      </process-definition>
      

      When I now run this process past the fork, I have four child tokens in JBPM_TOKEN table, two for State1 and two for State2.
      Can somebody explain why this happens and how to avoid this behaviour.

      Thanks in advance
      Walter