Hi,
I propose this solution based on an event type "node-enter" on the fork node.
| <process-definition name="parent-process">
|
| <swimlane name="tester">
| <assignment expression="user(ernie)" />
| </swimlane>
|
| <start-state name="start">
| <task name="start-task" swimlane="tester">
| <controller>
| <variable name="my-fork.leaving-transitions-count" />
| </controller>
| </task>
| <transition to="my-fork" />
| </start-state>
|
| <fork name="my-fork">
| <event type="node-enter">
| <action name="spawning"
class="xxx.SpawningMultipleTransitions"/>
| </event>
| <transition to="sub-process-state" />
| </fork>
|
| <process-state name="sub-process-state">
| <sub-process name="sub-process" />
| <transition to="join"/>
| </process-state>
|
| <join name="join">
| <transition to="end" />
| </join>
|
| <end-state name="end" />
|
| </process-definition>
|
| package xxx;
|
| import java.util.List;
|
| import org.jbpm.graph.def.ActionHandler;
| import org.jbpm.graph.def.Transition;
| import org.jbpm.graph.exe.ExecutionContext;
| import org.jbpm.graph.node.Fork;
|
| public class SpawningMultipleTransitions implements ActionHandler {
|
| public void execute(ExecutionContext executionContext) throws Exception
{
| Fork fork = (Fork) executionContext.getNode();
| String varName = new
StringBuffer(fork.getName()).append(".leaving-transitions-count").toString();
| String leavingTransitionCount = (String)
executionContext.getVariable(varName);
| if (leavingTransitionCount == null) {
| throw new RuntimeException("The variable " + varName + " must
have an integer value");
| }
| int n;
| try {
| n = Integer.parseInt(leavingTransitionCount);
| }
| catch (NumberFormatException e) {
| throw new RuntimeException("The variable " + varName + " must
have an integer value");
| }
|
| List transitions = fork.getLeavingTransitions();
| if (transitions.size() == 0) {
| throw new RuntimeException("The fork node " + fork.getName() +
| " must have a transition. Check your
processdefinition.xml");
| }
| else if (transitions.size() > 1) {
| throw new RuntimeException("The fork node " + fork.getName() +
| " must have only one transition. Check your
processdefinition.xml");
| }
| Transition transition = (Transition)
fork.getLeavingTransitions().remove(0);
| if (transition.getTo() == null) {
| throw new RuntimeException("The transition " +
transition.getName() + " of the fork node " +
| fork.getName() + " must have a destination. Check your
processdefinition.xml");
| }
| String name = transition.getName();
| name = new StringBuffer(name != null ? name :
"transition").append("-").toString();
| for (int i = 1; i <= n; i++) {
| Transition trans = new Transition(new
StringBuffer(name).append(i).toString());
| trans.setProcessDefinition(fork.getProcessDefinition());
| trans.setFrom(fork);
| trans.setTo(transition.getTo());
| fork.addLeavingTransition(trans);
| }
| }
| }
|
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