[rules-users] unable to update the changes (guvnor rules) to application using changeset

[Michael Anstis]

What is it you are trying to achieve?

If the change set contains DRL items the Classes used therein will need to
be on your client-side classpath (as explained in Esteban's blog). If you
want to use rules authored in Guvnor and Types declared in (or uploaded to)
Guvnor you should use the PKG resource type in your change-set and build
the package in Guvnor. I don't believe you should need to use a custom
class loader *unless* you really want only the DRL in your change-set but
your model classes only in Guvnor.

On 25 January 2012 12:27, Voradov <madalin100884 at yahoo.com> wrote:

> Hi, Esteban, Hi srinivasasanda.
>
> My opinion regarding the issue posted by srinivasasanda is the following:
>
> Having the changeset filled with DRL's taken from local jBoss application
> and using it in a java local running knowledge agent which has not added
> into the classpath the fact models will fail, of course with that
> /"java.lang.RuntimeException: KnowledgeAgent exception while trying to
> deserialize KnowledgeDefinitionsPackage"./
>
> On the other hand, when having changeset.xml set as:
> /<add>
>        <resource source='file:D:\rulemaster.drl' type='DRL' />
>   </add>/
> is working because it seems that the fact models used in defining those
> packages are in the classpath.
>
> REST protocol is used correctly in the changeset.xml.
>
> The problem with remotely loading pkg\drl files using REST is that you
> should somehow specify a custom classloader, like this:
>
> /KnowledgeBaseConfiguration kbaseConfig =
> KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null,
> *customClassLoader*);
> KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);
> //kbase with custom classloader
> KnowledgeAgentConfiguration aconf =
> KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
> aconf.setProperty("drools.agent.useKBaseClassLoaderForCompiling", "true");
> KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("test
> agent", kbase, aconf);
>  kagent.applyChangeSet(ResourceFactory.newFileResource(changeSetFile));/
>
> My question is: is there any possibility to create the classloader
> identical
> to the remote classloader used by guvnor? if yes, could you please show us
> exactly how to load remotelly from guvnor?
>
> Here, at
>
> http://ilesteban.wordpress.com/2010/06/22/knowledge-agent-custom-class-loaders/
>
> http://ilesteban.wordpress.com/2010/06/22/knowledge-agent-custom-class-loaders/
> there is described how to create a custom classloader, but it is not
> specified how to create it based on the Guvnor's jar files already existing
> there.
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/unable-to-update-the-changes-guvnor-rules-to-application-using-changeset-tp3652824p3687543.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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