I've been banging my head on this one and would like someone else (if they have
some time) to take a look...
I've been using jBPM for general process and have just recently being trying to
use some of the tasks. I've run into a problem and not sure why.
Basically, the problem I'm having is when I use a process definition from the
database I can't get a task to be created. I can see the task node hit but no
task is created. Using a process defintiion from a test case I can create a
process and the task is created. Here are the two different methods of creating
the same task:
| /** Creates a test process using the coded definition */
| public void startTestProcess()
| {
| logger.info("Starting Test Process via Coded Definition");
|
| // Create a test process definition
| ProcessDefinition processDefinition =
ProcessDefinition.parseXmlString(
| "<process-definition name='the baby
process'>" +
| " <start-state name='start'>" +
| " <transition name='baby cries'
to='t'/>" +
| " </start-state>" +
| " <task-node name='t'>" +
| " <task name='change nappy'>" +
| " <assignment
class='com.ider.Process.NappyAssignmentHandler'/>" +
| " </task>" +
| " <transition to='end'/>" +
| " </task-node>" +
| " <end-state name='end'/>" +
| "</process-definition>"
| );
|
| // Create the process
| ProcessInstance processInstance = new
ProcessInstance(processDefinition);
|
| // Signal the root token
| Token token = processInstance.getRootToken();
| token.signal();
|
| logger.info("Token Node: " + token.getNode());
|
| }
|
|
| /** Creates a new process based on a process definition name */
| public void startNewProcess(String processName)
| {
| JbpmContext jbpmContext =
(JbpmConfigurationStatic.jbpmConfiguration).createJbpmContext();
| try {
| logger.info("Starting Process via Definition [" +
processName + "]");
|
| // Load a process definition from the database
| ProcessDefinition myDef =
jbpmContext.getGraphSession().findLatestProcessDefinition(processName);
|
| // Create the process
| ProcessInstance newProcess = new ProcessInstance(myDef);
|
| // Signal the root token
| Token token = newProcess.getRootToken();
| token.signal();
|
| logger.info("Token Node: " + token.getNode());
|
| jbpmContext.save(newProcess);
|
| } finally {
| jbpmContext.close();
| }
| }
|
One called right after another yields the following logs:
|
| processAdmin.startTestProcess();
| processAdmin.startNewProcess("Test");
|
|
anonymous wrote :
| Created via Coded Definition:
| -----------------------------
| 18:03:37,875 INFO [UserAdminScreen] Starting Test Process via Coded
Definition
| 18:03:37,875 DEBUG [GraphElement] event 'process-start' on
'ProcessDefinition(the baby process)' for 'Token(/)'
| 18:03:37,875 DEBUG [GraphElement] event 'before-signal' on
'StartState(start)' for 'Token(/)'
| 18:03:37,875 DEBUG [GraphElement] event 'node-leave' on 'StartState(start)'
for 'Token(/)'
| 18:03:37,890 DEBUG [GraphElement] event 'transition' on 'Transition(baby
cries)' for 'Token(/)'
| 18:03:37,890 DEBUG [GraphElement] event 'node-enter' on 'TaskNode(t)' for
'Token(/)'
| 18:03:37,890 DEBUG [GraphElement] event 'task-create' on 'Task(change
nappy)' for 'Token(/)'
| 18:03:37,890 DEBUG [GraphElement] event 'task-assign' on 'Task(change
nappy)' for 'Token(/)'
| 18:03:37,890 DEBUG [GraphElement] event 'after-signal' on
'StartState(start)' for 'Token(/)'
| 18:03:37,890 INFO [UserAdminScreen] Token Node: TaskNode(t)
|
|
| Created via DB Definition:
| --------------------------
| 18:03:41,015 INFO [UserAdminScreen] Starting Process via Definition [Test]
| 18:03:41,015 DEBUG [DbPersistenceServiceFactory] creating persistence
service
| 18:03:41,015 DEBUG [DbPersistenceService] creating hibernate session
| 18:03:41,015 DEBUG [DbPersistenceService] beginning hibernate transaction
| 18:03:41,015 DEBUG [GraphElement] event 'process-start' on
'ProcessDefinition(Test)' for 'Token(/)'
| 18:03:41,015 DEBUG [GraphElement] event 'before-signal' on
'StartState(start)' for 'Token(/)'
| 18:03:41,015 DEBUG [GraphElement] event 'node-leave' on 'StartState(start)'
for 'Token(/)'
| 18:03:41,031 DEBUG [GraphElement] event 'transition' on 'Transition(baby
cries)' for 'Token(/)'
| 18:03:41,031 DEBUG [GraphElement] event 'node-enter' on 'TaskNode(t)' for
'Token(/)'
| 18:03:41,031 DEBUG [GraphElement] event 'node-leave' on 'TaskNode(t)' for
'Token(/)'
| 18:03:41,031 DEBUG [GraphElement] event 'transition' on
'Transition(248adb)' for 'Token(/)'
| 18:03:41,031 DEBUG [GraphElement] event 'node-enter' on 'EndState(end)' for
'Token(/)'
| 18:03:41,031 DEBUG [GraphElement] event 'process-end' on
'ProcessDefinition(Test)' for 'Token(/)'
| 18:03:41,031 DEBUG [GraphElement] event 'after-signal' on
'StartState(start)' for 'Token(/)'
| 18:03:41,031 INFO [UserAdminScreen] Token Node: EndState(end)
|
I see in the log where the coded definition creates the task but the definition
from the db skips over. I just deployed the process to the database, it looks
like the coded one:
| <process-definition xmlns="" name="Test">
| <start-state name="start">
| <transition name="baby cries" to="t"/>
| </start-state>
| <task-node name="t">
| <task name="change nappy">
| <assignment
class="com.ider.Process.NappyAssignmentHandler"/>
| </task>
| <transition to="end"/>
| </task-node>
| <end-state name="end"/>
| </process-definition>
|
btw, the NappyAssignmentHandler is straight from the examples.
Clearly, I've done something wrong...anyone care to take a guess?
Thanks in advance for any help!
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