Re: [rules-users] Drools and Jersey

Wolfgang, I am using <dependency> <groupId>org.drools</groupId> <artifactId>drools-core</artifactId> <version>5.3.1.Final</version> <type>jar</type> </dependency> Mauricio: It is something related to loading classes inside Jersey that brakes if I am using mvel. I use mvel always, because java syntax hurts me. Drools Team: I think the easier way would be to try this scenario yourself. This is a pom for Jersey. <dependency> <groupId>com.sun.jersey</groupId> <artifactId>jersey-client</artifactId> <version>1.12</version> </dependency> Thank you very much Cheers Mike 2012/3/14 Mauricio Salatino <salaboy(a)gmail.com&gt; > Sure.. we are interested in finding out what is happening. So, you find > that when you are using mvel something inside Jersey fails? > Did you find what exactly is happening inside Jersey? Probably it's > something related with the class loaders, but I never seen an error like > that when you specify the mvel dialect. > By the way, what exactly are you trying to do with mvel? did you try > using the mvel syntax without explicitly specifying the dialect? > > Cheers > > > > 2012/3/14 mike <mikemps(a)gmail.com&gt; > >> Wait ... I haven't solved the problem ... I mean, as of now I cannot use >> mvel if I want to use Jersey ... and I don't think it's Jersey's fault >> because it works in any condition except when using mvel. I thought that >> the Drools team follows this list and might be interested in that bug. >> >> Thank you very much >> Mike >> >> 2012/3/14 Mauricio Salatino <salaboy(a)gmail.com&gt; >> >>> Cool that you find that :) >>> Cheers >>> >>> >>> 2012/3/14 mike <mikemps(a)gmail.com&gt; >>> >>>> Hi Mauricio, >>>> >>>> I spent like 2 days debugging, before realizing that mvel was the >>>> culprit. The error is a Null Exception when resolving some service inside >>>> Jersey. I have to check my browser history at home for more details but the >>>> exception was happening inside Jersey. >>>> >>>> Please notice I reduced the code to the minimum. I had 'real' code >>>> doing more reasonable things with new Client. Client c = new Client() fails >>>> too. >>>> >>>> Thank you very much >>>> Mike >>>> >>>> >>>> 2012/3/14 Mauricio Salatino <salaboy(a)gmail.com&gt; >>>> >>>>> Hi Mike, I've never tried that before (a rule without the when >>>>> part..) is good to know that it works :) >>>>> Humm that's sounds weird.. why the dialect is affecting your Client >>>>> creation. >>>>> It could be that there is something wrong with the expression >>>>> evaluation. >>>>> It looks like MVEL cannot compile the new Client(); expression -> at >>>>> java.lang.String.<init>(Unknown Source) >>>>> Did you try with something like: >>>>> then \n >>>>> Client c = new Client(); >>>>> >>>>> I'm just guessing here, because it looks strange >>>>> >>>>> >>>>> 2012/3/14 mike <mikemps(a)gmail.com&gt; >>>>> >>>>>> Hi Mauricio, >>>>>> >>>>>> Thank you for the speedy reply. Ia m making rest call to web >>>>>> services using jersey. I simplified the rule to the max. The 'when' is not >>>>>> really needed. I get the exception on the call to "new Client()". Please >>>>>> keep in mind it works without dialect "mvel". >>>>>> >>>>>> Thank you very much >>>>>> Mike >>>>>> >>>>>> Here's the stack trace ............. >>>>>> java.lang.StringIndexOutOfBoundsException: String index out of >>>>>> range: -1 >>>>>> at java.lang.String.<init>(Unknown Source) >>>>>> at >>>>>> org.mvel2.CompileException.showCodeNearError(CompileException.java:149) >>>>>> at >>>>>> org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) >>>>>> at org.mvel2.CompileException.toString(CompileException.java:62) >>>>>> at java.lang.Throwable.<init>(Throwable.java:242) >>>>>> at java.lang.Exception.<init>(Unknown Source) >>>>>> at java.lang.RuntimeException.<init>(Unknown Source) >>>>>> at >>>>>> org.drools.runtime.rule.ConsequenceException.<init>(ConsequenceException.java:31) >>>>>> at >>>>>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >>>>>> at >>>>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1101) >>>>>> at >>>>>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1029) >>>>>> at >>>>>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1251) >>>>>> at >>>>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) >>>>>> at >>>>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) >>>>>> at >>>>>> org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) >>>>>> at >>>>>> com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) >>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) >>>>>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) >>>>>> at java.lang.reflect.Method.invoke(Unknown Source) >>>>>> at >>>>>> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) >>>>>> at >>>>>> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) >>>>>> at >>>>>> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) >>>>>> at >>>>>> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) >>>>>> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) >>>>>> at >>>>>> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69) >>>>>> at >>>>>> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48) >>>>>> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) >>>>>> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) >>>>>> at >>>>>> org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) >>>>>> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) >>>>>> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) >>>>>> at org.junit.runners.ParentRunner.run(ParentRunner.java:292) >>>>>> at >>>>>> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) >>>>>> at >>>>>> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) >>>>>> at >>>>>> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) >>>>>> at >>>>>> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) >>>>>> at >>>>>> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) >>>>>> at >>>>>> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) >>>>>> >>>>>> >>>>>> >>>>>> 2012/3/14 Mauricio Salatino <salaboy(a)gmail.com&gt; >>>>>> >>>>>>> what are you trying to do? >>>>>>> what's the error? >>>>>>> >>>>>>> the rule should look like >>>>>>> >>>>>>> rule "create Rest Client" >>>>>>> when >>>>>>> then new Client(); >>>>>>> end >>>>>>> >>>>>>> 2012/3/14 mike <mikemps(a)gmail.com&gt; >>>>>>> >>>>>>>> Hi there, >>>>>>>> >>>>>>>> I am trying to make rest calls from Drools. For that I am using >>>>>>>> Jersey http://jersey.java.net/. I cannot no get it to work if I >>>>>>>> use mvel, otherwise it works fine. >>>>>>>> >>>>>>>> Here is a sample rule: >>>>>>>> ---------------------------------------------------------- >>>>>>>> import com.sun.jersey.api.client.Client; >>>>>>>> >>>>>>>> dialect "mvel" >>>>>>>> >>>>>>>> rule "create Rest Client" >>>>>>>> then new Client(); >>>>>>>> end >>>>>>>> ---------------------------------------------------------- >>>>>>>> >>>>>>>> I would love to be able to use mvel since it curves java syntax :) >>>>>>>> >>>>>>>> Thank you >>>>>>>> Mike >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> rules-users mailing list >>>>>>>> rules-users(a)lists.jboss.org >>>>>>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> - MyJourney @ http://salaboy.wordpress.com >>>>>>> - Co-Founder @ http://www.jugargentina.org >>>>>>> - Co-Founder @ http://www.jbug.com.ar >>>>>>> >>>>>>> - Salatino "Salaboy" Mauricio - >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> rules-users mailing list >>>>>>> rules-users(a)lists.jboss.org >>>>>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>>>>> >>>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> rules-users mailing list >>>>>> rules-users(a)lists.jboss.org >>>>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> - MyJourney @ http://salaboy.wordpress.com >>>>> - Co-Founder @ http://www.jugargentina.org >>>>> - Co-Founder @ http://www.jbug.com.ar >>>>> >>>>> - Salatino "Salaboy" Mauricio - >>>>> >>>>> >>>>> _______________________________________________ >>>>> rules-users mailing list >>>>> rules-users(a)lists.jboss.org >>>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> rules-users mailing list >>>> rules-users(a)lists.jboss.org >>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>> >>>> >>> >>> >>> -- >>> - MyJourney @ http://salaboy.wordpress.com >>> - Co-Founder @ http://www.jugargentina.org >>> - Co-Founder @ http://www.jbug.com.ar >>> >>> - Salatino "Salaboy" Mauricio - >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > > -- > - MyJourney @ http://salaboy.wordpress.com > - Co-Founder @ http://www.jugargentina.org > - Co-Founder @ http://www.jbug.com.ar > > - Salatino "Salaboy" Mauricio - > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users