Oracle神谕

Fork : A fork spawns（产生） multiple concurrent(并发) paths of execution.
<process-definition name="the fork-in-loop process">
   <swimlane name="initiator"/>
  
   <start-state name="start" swimlane="initiator">
      <transition to="aFork"/>
   </start-state>
  
   <fork name="aFork">
      <transition to="aState"/>
   </fork>
  
   <state name="aState" swimlane="initiator">
       <transition to="aJoin"/>
   </state>
  
   <join name="aJoin">
      <transition to="aFork"/>
   </join>
  
   <end-state name="end"/>
</process-definition>

<process-definition name="the scheduler process">
    <swimlane name="initiator"/>
   
    <start-state name="start" swimlane="initiator">
        <transition to="only state">       
    </start-state>
   
    <state name="only state" swimlane="initator">
        <action>
           <delegation class="org.jbpm.delegation.action.SchedulerJobActionHandler">
           <job>
              <delegation class="org.jbpm.scheduler.LoggingActionHandler"/>
              <delay>0</delay> (延迟)
              <name>halleluya</name>
           </job>
           </delegation>
        </action>
       
        <action event-type="state-leave">
          <delegation class="org.jbpm.delegation.action.CancelJobActionHandler">halleluya</delegation>
        </action>
       
        <transition to="end"/>
    </state>
   
    <end-state name="end"/>
</process-definition>

Decision : A decision decides between multiple paths of execution which are exclusive(独占的)
<process-definition name="the decision process">
   <swimlane name="initiator"/>
    
   <start-state name="start" swimlane="initiator">
      <transition to="only descision">
   </start-state>
  
   <decision name="only descision">
      <delegation class="org.jbpm.impl.DecisionTestDecisionHandler"/>
      <transition name="left" to="inside the left street"/>
      <transition name="right" to="inside the right street"/>
   </decision>
  
   <state name="inside the left street" swimlane="initiator">
      <transition to="end"/>
   </state>
  
   <state name="inside the right street" swimlane="initiator">
      <transition to="end"/>
   </state>
  
   <end-state name="end"/>
</process-definition>