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 <sala...@gmail.com> > 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 <mike...@gmail.com> > >> 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 <sala...@gmail.com> >> >>> 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 <mike...@gmail.com> >>> >>>> 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@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@lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >> >> _______________________________________________ >> rules-users mailing list >> rules-users@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@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > >
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