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List: jboss-user
Subject: Re: [jboss-user] [JBoss Tools] - Message Events in statefully flows
From: Kris Verlaenen <do-not-reply () jboss ! com>
Date: 2010-08-31 14:01:32
Message-ID: 770787522.191901283263294934.JavaMail.jive () clearspace02 ! app ! mwc ! hst ! phx2 ! redhat ! com
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Kris Verlaenen [http://community.jboss.org/people/KrisVerlaenen] replied to the \
discussion
"Message Events in statefully flows"
To view the discussion, visit: http://community.jboss.org/message/559792#559792
--------------------------------------------------------------
Rob,
You should signal your flow about the occurence of an event using \
processInstance.signalEvent(name, value); So the problem is, how do I find the right \
process instance to signal?
Drools Flow currently does not allow for automatic correlation of messages. You can \
however use the processInstanceId for correlation purposes:
a) store the process instance id as part of your domain model, when the event occurs \
due to a change of one of your facts, you can simply retrieve the process instance id \
from the fact
b) you can maintain a separate table that maps process instance id to some other \
domain data (like for example a fact id), so that you can lookup the process instance \
id like this.
We'll be looking at how to provide more automatic correlation mechanisms as part of \
the BPMN2 implementation.
Kris
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17px; font-weight: normal;"> Message Events in statefully flows
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<span style="margin-bottom: 10px;">
reply from <a href="http://community.jboss.org/people/KrisVerlaenen">Kris \
Verlaenen</a> in <i>JBoss Tools</i> - <a \
href="http://community.jboss.org/message/559792#559792">View the full discussion</a> \
</span> <hr style="margin: 20px 0; border: none; background-color: #dadada; height: \
1px;">
<div class="jive-rendered-content"><p>Rob,</p><p style="min-height: 8pt; height: 8pt; \
padding: 0px;"> </p><p>You should signal your flow about the occurence of an \
event using processInstance.signalEvent(name, value);</p><p>So the problem is, how do \
I find the right process instance to signal?</p><p style="min-height: 8pt; height: \
8pt; padding: 0px;"> </p><p>Drools Flow currently does not allow for automatic \
correlation of messages.  You can however use the processInstanceId for \
correlation purposes:</p><p style="min-height: 8pt; height: 8pt; padding: \
0px;"> </p><p>a) store the process instance id as part of your domain model, \
when the event occurs due to a change of one of your facts, you can simply retrieve \
the process instance id from the fact</p><p style="min-height: 8pt; height: 8pt; \
padding: 0px;"> </p><p>b) you can maintain a separate table that maps process \
instance id to some other domain data (like for example a fact id), so that you can \
lookup the process instance id like this.</p><p style="min-height: 8pt; height: 8pt; \
padding: 0px;"> </p><p>We'll be looking at how to provide more automatic \
correlation mechanisms as part of the BPMN2 implementation.</p><p style="min-height: \
8pt; height: 8pt; padding: 0px;"> </p><p>Kris</p></div>
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<p style="margin: 0;">Reply to this message by <a \
href="http://community.jboss.org/message/559792#559792">going to Community</a></p> \
<p style="margin: 0;">Start a new discussion in JBoss Tools at <a \
href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2128">Community</a></p>
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