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Subject: [jboss-user] [jBPM] - jBPM 5.4, Persistence, and Safe-Points
From: Franco Gasperino <do-not-reply () jboss ! com>
Date: 2013-06-27 22:51:54
Message-ID: 2-825366-3-147195-1372373506324.jivesbs.jivemailuser () https://community ! jboss ! org
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Franco Gasperino [https://community.jboss.org/people/franco.gasperino] created the \
discussion
"jBPM 5.4, Persistence, and Safe-Points"
To view the discussion, visit: https://community.jboss.org/message/825366#825366
--------------------------------------------------------------
Community,
Excuse the long-winded post. I'm trying to debug an issue with an integration project \
with the following components:
* jBPM 5.4 final, Drools 5.5 final
* Spring 3.2.x
* Bitronix 2.1.x
The core jBPM engine is heavily integrated with a custom stack allowing process \
instances to be created and run via all sorts of connectivity. The custom layer will \
take the process id & input parameters, delegate to a thread in an executor, which \
will:
1. Instantiate the drools environment (with JTA support).
2. Create the knowledge session.
3. Create a custom WorkItemHandler, associate each custom service task with this \
handler. 4. Create and associate the event handlers.
5. Create and start the process instance.
Everything executes as-expected, the JTA is performing commits and I can see the \
Hibernate activity inserting, updating, and deleting records from the Derby XA \
database.
However, when testing a process instance which *should* trigger a safe-point, i see \
unexpected behavior. In this case:
* Script "Hello" is a java/groovy/whatever script task.
* ServiceTask "MockAsyncTask" is a java class, which is associated / registered with \
the custom WorkItemHandler. * executeWorkItem() does NOT call \
completeWorkItem()
* Returns control to the jBPM engine, which should trigger a safe-point.
* Causes return of startProcessInstance(), which will exit the worker thread in the \
executor.
* Script "Bye" is a java/groovy/whatever script task.
The workflow: Start -> Hello -> MockAsyncTask -> Bye -> End
As expected, I see the behavior. I see that the ProcessInstance object associated has \
a state field of "2", which is active. Howevever, the hibernate update statements on \
the ProcessInstanceInfo table always have a state value of '0'. This is the breaking \
behavior.
When I attempt to call the adapter layer with the session id, process instance id, \
work item id, and a payload:
1. Instantiate the drools environment (JTA support).
2. Load the existing knowledge session.
3. Create a custom WorkItemHandler, associate each custom service task with this \
handler. 4. Create and associate event handlers.
5. Call completeWorkItem().
The workItem does complete, and i see it deleted from the WorkItemInfo table. \
However, since the process instance state has been reloaded with a value of '0', the \
"Bye" script task is never fired.
Any ideas? A full code dump would be huge, but I'm happy to inject some loggers if it \
would assist troubleshooting.
Thanks!
Franco
--------------------------------------------------------------
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17px; font-weight: normal;"> jBPM 5.4, Persistence, and Safe-Points
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<span style="margin-bottom: 10px;">
created by <a href="https://community.jboss.org/people/franco.gasperino">Franco \
Gasperino</a> in <i>jBPM</i> - <a \
href="https://community.jboss.org/message/825366#825366">View the full discussion</a> \
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1px;">
<div class="jive-rendered-content"><p>Community,</p><p style="min-height: 8pt; \
height: 8pt; padding: 0px;"> </p><p>Excuse the long-winded post. I'm trying to \
debug an issue with an integration project with the following components:</p><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ul><li>jBPM 5.4 final, \
Drools 5.5 final</li><li>Spring 3.2.x</li><li>Bitronix 2.1.x</li></ul><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The core jBPM engine \
is heavily integrated with a custom stack allowing process instances to be created \
and run via all sorts of connectivity. The custom layer will take the process id \
& input parameters, delegate to a thread in an executor, which will:</p><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ol><li>Instantiate the \
drools environment (with JTA support).</li><li>Create the knowledge \
session.</li><li>Create a custom WorkItemHandler, associate each custom service task \
with this handler.</li><li>Create and associate the event handlers.</li><li>Create \
and start the process instance.</li></ol><p style="min-height: 8pt; height: 8pt; \
padding: 0px;"> </p><p>Everything executes as-expected, the JTA is performing \
commits and I can see the Hibernate activity inserting, updating, and deleting \
records from the Derby XA database.</p><p style="min-height: 8pt; height: 8pt; \
padding: 0px;"> </p><p>However, when testing a process instance which *should* \
trigger a safe-point, i see unexpected behavior. In this case:</p><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><ul><li>Script "Hello" \
is a java/groovy/whatever script task.</li><li>ServiceTask "MockAsyncTask" is a java \
class, which is associated / registered with the custom WorkItemHandler. \
<ul><li>executeWorkItem() does NOT call completeWorkItem()</li><li>Returns control to \
the jBPM engine, which should trigger a safe-point.</li><li>Causes return of \
startProcessInstance(), which will exit the worker thread in the \
executor.</li></ul></li><li>Script "Bye" is a java/groovy/whatever script \
task.</li></ul><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><p>The workflow: Start -> Hello -> MockAsyncTask -> Bye \
-> End</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>As \
expected, I see the behavior. I see that the ProcessInstance object associated has a \
state field of "2", which is active. Howevever, the hibernate update statements on \
the ProcessInstanceInfo table always have a state value of '0'. This is the breaking \
behavior.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When \
I attempt to call the adapter layer with the session id, process instance id, work \
item id, and a payload:</p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><ol><li>Instantiate the drools environment (JTA \
support).</li><li>Load the existing knowledge session.</li><li>Create a custom \
WorkItemHandler, associate each custom service task with this handler.</li><li>Create \
and associate event handlers.</li><li>Call completeWorkItem().</li></ol><p \
style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The workItem does \
complete, and i see it deleted from the WorkItemInfo table. However, since the \
process instance state has been reloaded with a value of '0', the "Bye" script task \
is never fired.</p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><p>Any ideas? A full code dump would be huge, but I'm happy to inject \
some loggers if it would assist troubleshooting.</p><p style="min-height: 8pt; \
height: 8pt; padding: 0px;"> </p><p>Thanks!</p><p style="min-height: 8pt; \
height: 8pt; padding: 0px;"> </p><p>Franco</p></div>
<div style="background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style="margin: 0;">Reply to this message by <a \
href="https://community.jboss.org/message/825366#825366">going to Community</a></p> \
<p style="margin: 0;">Start a new discussion in jBPM at <a \
href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034">Community</a></p>
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