[rules-users] Drools and jBPM integration
Aziz Boxwala
boxwala at yahoo.com
Mon Nov 12 11:54:47 EST 2007
Fabian,
Response to #1: I believe the rule file needs to reside in the root directory of the archive/directory of the example application. I have not tried that out so not sure.
With Drools 4.0.x, you have the option of having your rules be located in the BRMS.
Response to #2: You should be able to do so using one decision-node. Associate the rule action handler with either the Before Signal or Node Enter event and specify your decision conditions on the transitions out of that node..
--Aziz
----- Original Message ----
From: Fabian Weisensee <fabian at weisensee.net>
To: rules-users at lists.jboss.org
Sent: Monday, November 12, 2007 7:35:02 AM
Subject: [rules-users] Drools and jBPM integration
Hi there
I have some questions concerning Drools and jBPM integration.
I know there is this wiki page:
http://wiki.jboss.org/wiki/Wiki.jsp?page=JbpmAndDrools
but first it's not really detailed and second does it seem to be
outdated.
1) I changed the FireRulesActionHandler from the wiki to reflect the
API-changes, that at least it's compileable. In the jBPM process
definition the rule file is simply passed as parameter like this:
"/Shipper.drl". To which directory does this relative path apply? So
where do I have to deploy this rule file? I tried several locations in
the application server, but even with an absolute path every time
FireRulesActionHandler tries to read the rule it crashes:
ERROR [GraphElement] action threw exception: null
java.lang.NullPointerException
at java.io.Reader.<init>(Unknown Source)
at java.io.InputStreamReader.<init>(Unknown Source)
at
rechnung.kontrolle.FireRulesActionHandler.readRule(FireRulesActionHandler.java:83)
at
rechnung.kontrolle.FireRulesActionHandler.execute(FireRulesActionHandler.java:50)
2) As I understood the example in the wiki you have to create a node
which executes the rule and then a decision-node which routes the
process flow according to the rule results.
Is it possible to do this with just one node?
But perhaps I should ask this at the jBPM forums.
Every help would be appreciated. Thanks in advance.
Fabian Weisensee
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