Aziz Boxwala wrote:
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.
We just take a Reader, so the file can be anywhere. In our examples we tend to put stuff in the classpath as it makes for very easy loading.

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@weisensee.net>
To: rules-users@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but first it's not really detailed and second does it seem to be outdated.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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