Re: [rules-users] Drools and OSGi

I still seem to be having problems getting it working. The problem did not go away. I still get the same error. Would anyone know of a simple step-by-step tutorial for using Drools in a Felix OSGi environment? Preferrably within Eclipse and with Pax Runner. Any help would be very much appreciated.

Thank you for your time! Kind regards Aerv 2010/4/6 AervTerrh <woutervanisterdael(a)gmail.com <mailto:woutervanisterdael@gmail.com>> Thanks for the reply. I will try this tomorrow and keep you posted! 2010/4/5 Jason Davidson [via Drools - Java Rules Engine] <[hidden email] <http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698969&i=0... I don't know if this helps, but I had to turn the MVEL JIT compiler off in the Equinox OSGi container: OptimizerFactory.setDefaultOptimizer("reflective"); Also, we used pre-compiled packages instead of compiling the DRL files at runtime. For example: .... RuleBaseConfiguration ruleBaseConfig = new RuleBaseConfiguration(); ruleBaseConfig.setClassLoader(this.getClass().getClassLoader()); //MVEL in OSGi is a complete CF - this turns off the MVEL JIT - potential resource hog but that's the nature of OSGi classloading //and Drools... OptimizerFactory.setDefaultOptimizer("reflective"); RuleBase ruleBase = RuleBaseFactory.newRuleBase(ruleBaseConfig); InputStream pkgIs = this.getClass().getResourceAsStream("/com/cjs/hazel/rules/com.cjs.hazel.rules.pkg"); addPackage(ruleBase,pkgIs); ..... On Fri, Apr 2, 2010 at 4:42 PM, AervTerrh <[hidden email] <http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=0... wrote: Hey, Okay. I know this problem can be found all over. But I can't seem to figure out a solution to it. Somehow I must be doing something wrong. I've created a simple application that evaluates some rules and changes some objects based on that. Everything worked fine, not a single problem there. All libraries could be easily found etc. Now I wanted to convert this to a Felix OSGi bundle. So, what I did, was creating a bundle (new plugin project based on existing jars) with the drools jars (core, compiler, api, jsr) and tried the next code in the RuleEngine class: Properties props = new Properties(); props.setProperty("drools.dialect.java.compiler", "JANINO"); KnowledgeBuilderConfiguration config = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(props, null); (here's where it fails) KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(config); kbuilder.add(ResourceFactory.newClassPathResource(fileName, RuleEngine.class), ResourceType.DRL); This is pretty much the loading of the rule file. The RuleEngine is started in an Activator. The file is found and everything. But I keep getting the same error when starting the bundle. org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.mvel.MVELDialectConfigurati on:mvel:null' at org.drools.compiler.PackageBuilderConfiguration.addDialect(P ackageBuilderConfiguration.java:274) at org.drools.compiler.PackageBuilderConfiguration.buildDialect ConfigurationMap(PackageBuilderConfiguration.java:259) at org.drools.compiler.PackageBuilderConfiguration.init(Package BuilderConfiguration.java:176) at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:148) at org.drools.builder.impl.KnowledgeBuilderProviderImpl.newKnow ledgeBuilderConfiguration(KnowledgeBuilderProviderImpl.java: 21) at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuild erConfiguration(KnowledgeBuilderFactory.java:68) at test.Activator$RuleCreator.createRule(Activator.java:52) at test.Activator.start(Activator.java:32) at org.apache.felix.framework.util.SecureAction.startActivator( SecureAction.java:639) at org.apache.felix.framework.Felix.activateBundle(Felix.java:1 700) at org.apache.felix.framework.Felix.startBundle(Felix.java:1622 ) at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.j ava:1077) at org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl .java:264) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: org.drools.rule.builder.dialect.mvel.MVELDialectConfiguratio n at java.net.URLClassLoader$1.run(Unknown Source) The packages I import in the manifest: Import-Package: org.codehaus.janino;version="2.4.3", org.drools, org.drools.builder, org.drools.compiler, org.drools.io <http://org.drools.io>;, org.drools.rule, org.drools.rule.builder.dialect.java, org.drools.rule.builder.dialect.mvel, org.osgi.framework;version="1.3.0" In my target platform I add the the drools project I created (with drools-xx.jar (the necessary ones), I also added the following: -ant -antlr-runtime -janino -jsr94 -xstream But I can't seem to get it working... Does anyone know what can be done about this? Or a working example of Drools in Felix OSGi would also be helpful. Any help is very much appreciated, I've been looking into this for days. Thanks! Kind regards, Aerv -- View this message in context: http://n3.nabble.com/Drools-and-OSGi-tp694011p694011.html Sent from the Drools - User mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list [hidden email] <http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=1... https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list [hidden email] <http://n3.nabble.com/user/SendEmail.jtp?type=node&node=698731&i=2... https://lists.jboss.org/mailman/listinfo/rules-users -- __________________________________ Van Isterdael Wouter Roesbeke 27 9402 Meerbeke 0496401476 ------------------------------------------------------------------------ View this message in context: Re: Drools and OSGi <http://n3.nabble.com/Drools-and-OSGi-tp694011p698969.html> Sent from the Drools - User mailing list archive <http://n3.nabble.com/Drools-User-f47000.html> at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users -- __________________________________ Van Isterdael Wouter Roesbeke 27 9402 Meerbeke 0496401476 _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users