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blocking task in start-state does not block
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created by <a href="http://community.jboss.org/people/laszlovandenhoek">László van den Hoek</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/600661#600661">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm running into the problem that a blocking task in a start-state node does not prevent a token to proceed to the next node, but a "regular" blocking task in a task-node does. I'm using the jBPM 3.2 runtime included with the latest JBoss SOA-P 5.1. </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The below JUnit test code illustrates the problem. There are two test cases; the only real difference is that the one tests a blocking start task and the other tests a blocking "regular" task. For me, the first test case fails but the second one succeeds. The way they are written, I would expect this to be the other way around.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I understand from {thread:id=390489} that creating a new ProcessInstance will not automatically create a TaskInstance for the task defined in the start-state, if any. While this strikes me as odd, I can accept that is the way things work. However, once I manually create the StartTaskInstance, I do expect it to block progress to the next node.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>{code}</p><p>package nl.travelcard.das.workflow;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import java.util.HashMap;</p><p>import java.util.Map;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import junit.framework.TestCase;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import org.jbpm.graph.def.ProcessDefinition;</p><p>import org.jbpm.graph.exe.ProcessInstance;</p><p>import org.jbpm.taskmgmt.exe.TaskInstance;</p><p>import org.junit.Before;</p><p>import org.junit.Test;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public class JbpmTest extends TestCase {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    private ProcessDefinition pd;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    @Before</p><p>    public void setUp() {</p><p>        this.pd = ProcessDefinition.parseXmlString(            </p><p>            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + </p><p>            "<process-definition  xmlns=\"\"  name=\"blockingStartTask\">" +</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            "    <start-state name=\"start\">" +</p><p>            "        <task blocking=\"true\" name=\"blocking task in start node\"></task>" +</p><p>            "        <transition to=\"task\"></transition>" +</p><p>            "    </start-state>" +</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            "    <task-node name=\"task\">" +</p><p>            "        <task blocking=\"true\" name=\"blocking task in task node\" ></task>" +</p><p>            "        <transition to=\"end\"></transition>" +</p><p>            "    </task-node>" +</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            "    <end-state name=\"end\"></end-state>" +</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            "</process-definition>"</p><p>        );</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    @Test</p><p>    public void testBlockingStartTask() {</p><p>        ProcessInstance pi = pd.createProcessInstance();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        //I would have expected a task instance to have been created by now; I guess that's not how it works.</p><p>        //assertEquals("expected task was not created", 1, pi.getTaskMgmtInstance().getTaskInstances().size());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        TaskInstance ti = pi.getTaskMgmtInstance().createStartTaskInstance();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        assertEquals("expected task was not created", 1, pi.getTaskMgmtInstance().getTaskInstances().size());</p><p>        assertEquals("task has wrong name", "blocking task in start node", ti.getName());</p><p>        assertTrue(ti.isBlocking());</p><p>        assertTrue(ti.isStartTaskInstance());</p><p>        assertTrue(pi.getTaskMgmtInstance().hasBlockingTaskInstances(pi.getRootToken()));</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        try {</p><p>            pi.getRootToken().signal();</p><p>            fail("task that should be blocking nevertheless did not block");</p><p>        } catch (IllegalStateException e) {</p><p>            assertEquals("state changed despite blocking task", "start", pi.getRootToken().getNode().getName());</p><p>        }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        assertEquals("start", pi.getRootToken().getNode().getName());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    @Test</p><p>    public void testBlockingRegularTask() {</p><p>        ProcessInstance pi = pd.createProcessInstance();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        assertEquals("start", pi.getRootToken().getNode().getName());</p><p>        pi.signal(); //this ought to go wrong, but it doesn't (see previous test case)</p><p>        assertEquals("task", pi.getRootToken().getNode().getName());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        assertEquals("expected task was not created", 1, pi.getTaskMgmtInstance().getTaskInstances().size());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        TaskInstance ti = pi.getTaskMgmtInstance().getTaskInstances().iterator().next();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        assertEquals("task has wrong name", "blocking task in task node", ti.getName());</p><p>        assertTrue(ti.isBlocking());</p><p>        assertFalse(ti.isStartTaskInstance());</p><p>        assertTrue(pi.getTaskMgmtInstance().hasBlockingTaskInstances(pi.getRootToken()));</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        try {</p><p>            pi.getRootToken().signal();</p><p>            fail("task that should be blocking nevertheless did not block");</p><p>        } catch (IllegalStateException e) {</p><p>            assertEquals("state changed despite blocking task", "task", pi.getRootToken().getNode().getName());</p><p>        }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        assertEquals("task", pi.getRootToken().getNode().getName());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        ti.end();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        assertEquals("end", pi.getRootToken().getNode().getName());</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    }</p><p>}</p><p>{code}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Any thoughts?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks in advance!</p></div>
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