Here is the first lines of the error message :
14:58:57,457 | ERROR | tp1946301910-151 | AbstractKieModule |
239 - org.drools.compiler - 184.108.40.20640429-1643 | Unable to build
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
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.
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