[rules-users] KnowledgeAgent custom class loader not working for PKG resources

Wed Feb 22 10:52:32 EST 2012

Thanks – I will try it this morning.

Herm

From: Esteban [via Drools] [mailto:ml-node+s46999n3765911h50 at n3.nabble.com]
Sent: Wednesday, February 22, 2012 1:55 AM
To: Herman Post
Subject: Re: [rules-users] KnowledgeAgent custom class loader not working for PKG resources

I forgot to mention that you will have to change your code a little bit. Instead of passing a KnowledgeBuilderConfiguration to the agent, you will need to add a configuration option to the KnowledgeAgentConfiguration object your are using:

aconf.setProperty("drools.agent.useKBaseClassLoaderForCompiling", "true");

This way you are telling the agent to use the kbase's internal CL (We may set this as the default value I think).

If you want to try my fix, this is what you need to do:

- Prerequisites: java 1.5 or grater, maven 3.0.3 or grater and git
1.- $git clone git://github.com/droolsjbpm/drools.git<http://github.com/droolsjbpm/drools.git> drools  (It will download all the sources and place them in "drools" directory")
2.- Get the fix from my repo. Fortunately, the fix is just one file: https://raw.github.com/esteban-aliverti/drools/61c2110df8c55c67ff532491865b3f28f368e8db/drools-core/src/main/java/org/drools/agent/impl/KnowledgeAgentImpl.java
3.- Replace the file /drools-core/src/main/java/org/drools/agent/impl/KnowledgeAgentImpl.java in your working copy with the file you downloaded in the previous step.
4.- $mvn clean install -DskipTests=true (this will compile everything and install the generated artifacts in your local maven repo) This could take some time.
5.- If in your project you are already using maven, then you just need to update the version of your dependencies to 5.4.0-SNAPSHOT. If you are not  using maven, then you need to go to your local repo an get the generated drools-core-5.4.0-SNAPSHOT.jar and use it.

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com

On Tue, Feb 21, 2012 at 7:52 PM, Hrumph <[hidden email]</user/SendEmail.jtp?type=node&node=3765911&i=0>> wrote:
Thanks Esteban.  I’m not too adept with Git but will see what I can do.

Herm

From: Esteban [via Drools] [mailto:[hidden email]<http://user/SendEmail.jtp?type=node&node=3764501&i=0>]
Sent: Tuesday, February 21, 2012 11:10 AM

To: Herman Post
Subject: Re: [rules-users] KnowledgeAgent custom class loader not working for PKG resources

I added some comments to the issue and provided a possible solution to it. I'm waiting for the review and comments from the core developers.
In the meantime, if you have some skills with maven and git and you don't want to wait, you can create your own version of drools applying the provided patch to see if everything is ok.

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ click here.
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