[rules-users] kContainer.newKieSession() fails in Apache Karaf

[jhusby]

Mario,

Do you know whether the new method Charles added:

   ks.newKieClasspathContainer(getClass().getClassLoader());

will get merged into the 6.0.x release?  I cannot seem to make incremental
rule building work in OSGi without it. For instance, even when I run (in
Apache Karaf) the example project Charles made (referenced below), when I
call:

   ks.newKieContainer(APP_REL_ID).getKieBase();

it fails with:

   java.lang.IllegalArgumentException:
   conflict Resolver 'org.drools.core.conflict.DepthConflictResolver' not
found

probably because I'm not initializing the KieClasspathContainer with the
classloader from my class.

Thanks!

Joseph


Charles Moulliard-2 wrote
> My example uses this META-INF/kmodules.xml file to let the KieContainer
> to scan and discover the resources (.drl, pacjkages) when we call
> 
>    KieContainer kcont =
> ks.newKieClasspathContainer(getClass().getClassLoader());
>    KieBase kbase = kcont.getKieBase("sampleKBase");
> 
> As you have mentioned in your email, this is a static approach as we
> load the resources before to create a KieSession and fire the rules.
> To be able to do increment, the approach that you mention is the way
> to go. I have also created an example where the KieModule is created
> using a programming approach -->
> *https://github.com/cmoulliard/droolsjbpm-osgi-examples/blob/master/simple-external-resource/src/main/java/org/drools/example/osgi/FetchExternalResourceOsgiActivator.java
> <https://github.com/cmoulliard/droolsjbpm-osgi-examples/blob/master/simple-external-resource/src/main/java/org/drools/example/osgi/FetchExternalResourceOsgiActivator.java>.
> That should not be difficult to adapt it to support increment*
> 
> 3.  It looks like I'll have to wait until Drools 6.1.0 to get the
> parameter
> to specify a classloader when creating the container?  I see you just
> added
> that recently.  I've tried using
> Thread.currentThread().setContextClassLoader(...) but can't seem to make
> that work with Drools 6.0.1 in Karaf 2.3.3 because then
> RuleBaseConfiguration sets the classloader and uses it to try resolving
> org.drools.core.conflict.DepthConflictResolver, which it can't do because
> it's no longer using the OSGi classloader.
> 
> I have no ideas if my modifications will be merged with 6.0.x release.
> Mario Fusco should be able to provide a response





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