[rules-users] How to determine Drools runtime version?

Hi, I'd like to determine at runtime which version of Drools is in use/on the classpath. I cannot use reflection on the Drools classes itself, as this will not work in the intended runtime environment (Google App Engine). The following code works in a normal Java VM, but not in GAE: Package droolsCorePackage = KnowledgePackageImp.class.getPackage(); String implementationTitle = droolsCorePackage.getImplementationTitle(); String implementationVersion = droolsCorePackage.getImplementationVersion(); In GAE, the getImplementation{Title|Version} methods both return null. Is there another, maybe more "official" way of determining the Drools version? I'd like to support Drools 5.x.y starting at x >= 3. Best regards Ansgar