[rules-users] Rules compilation error with OSGi integration (6.1.0.Beta3)

[Charles Moulliard]

A test case will be required to reproduce your problem. Do you have a
pax-exam test ?


On Tue, May 20, 2014 at 1:03 PM, Ephemeris Lappis <
ephemeris.lappis at gmail.com> wrote:

> Hello.
>
> Here is the first lines of the error message :
>
>
> 14:58:57,457 | ERROR | tp1946301910-151 | AbstractKieModule
>  |
> 239 - org.drools.compiler - 6.1.0.20140429-1643 | Unable to build
> KieBaseModel:MyKBase
> Rule Compilation error : [Rule name='Main Rule']
>         my/tests/drools/osgi/expert/rules/Rule_Main_Rule1409557233.java
> (8:649) :
> Incorrect number of arguments for type HashMap<K,V>; it cannot be
> parameterized with arguments <?>
>         my/tests/drools/osgi/expert/rules/Rule_Main_Rule1409557233.java
> (8:666) :
> Syntax error on token "<", ? expected after this token
>
>
> I have found the explanation and a workaround : put it all with a strict
> "1.5" syntax in the RHS ! In this current case, do not use <> to infere the
> generic type, but use the expected declared types instead.
>
> After a rather touchy remote debug of the ServiceMix runtime to inspect
> what
> is different from the Junit tests, I think that the problem comes from the
> classloader that is associated with the Kie container. Before compilation
> the language source and target level is  set with version 1.7 as expected,
> but in the nameEnvironment that is passed to the JavaCompiler (indeed, ecj
> compiler), the droolsClassloader is of type
> "org/apache/felix/framework/ModuleImpl$ModuleClassLoaderJava5". As its name
> seems to incidate, I'm afraid that the Karaf/Felix loader is originally
> built in 1.5.
>
> I've read some posts about the eclipse compiler that perhaps takes into
> account the caller compliance to adapt its compilation language level.
>
> Class loaders seem to be a serious problem when using Drools in complex
> environment such as a OSGi one...
>
> Please, could you confirm my analysis, and, if you have one, propose any
> better solution ? I don't know, for example, if it's possible to influence
> Karaf to use different levels of bundle class loaders...
>
> Thanks a lot.
>
> Regards.
>
>
>
> --
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> Sent from the Drools: User forum mailing list archive at Nabble.com.
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-- 
Charles Moulliard
Apache Committer / Architect @RedHat
Twitter : @cmoulliard | Blog :  http://cmoulliard.github.io
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