Re: [rules-users] Slf4j Log4j logger not working with Drools drl while using as a global variable.

Check if the logger isn't null (by adding a System.out in the then part of the rule). If that's the case, then that error message is pretty poor (or even incorrect): java.lang.RuntimeException: cannot invoke method: info It should clearly talk about a NullPointer instead. So, if that's the case, create a jira issue. https://issues.jboss.org/browse/DROOLS On 27-05-14 07:09, Soumya.plavaga wrote: > I am using global slf4j log4j logger as a global variable within our drl > and > inserting that global logger value at runtime into kiesession. While we > are > trying to do logger.info with multiple arguments then it's giving the > following exception stack trace - > > Exception executing consequence for rule "Test Logger 2" in > test.rules.system: java.lang.RuntimeException: cannot invoke method: info > at > org.drools.core.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) > at > org.drools.core.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1027) > at org.drools.core.phreak.RuleExecutor.fire(RuleExecutor.java:129) > at > org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:71) > at > org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:935) > at > org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1200) > at > org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:952) > at > org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:926) > at > org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:232) > at > test.platform.rules.executor.service.impl.RuleExecutorServiceImplTest.testExecuteRule(RuleExecutorServiceImplTest.java:230) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at > org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) > at > org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) > at > org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) > at > org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) > at > org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74) > at > org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83) > at > org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72) > at > org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:232) > at > org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89) > at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) > at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) > at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) > at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) > at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) > at > org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) > at > org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71) > at org.junit.runners.ParentRunner.run(ParentRunner.java:309) > at > org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:175) > 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) > Caused by: java.lang.RuntimeException: cannot invoke method: info > at > org.mvel2.optimizers.impl.refl.nodes.MethodAccessor.getValue(MethodAccessor.java:63) > at > org.mvel2.optimizers.impl.refl.nodes.VariableAccessor.getValue(VariableAccessor.java:37) > at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:108) > at org.mvel2.MVELRuntime.execute(MVELRuntime.java:86) > at > org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123) > at > org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119) > at org.mvel2.MVEL.executeExpression(MVEL.java:930) > at > org.drools.core.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:107) > at > org.drools.core.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1016) > ... 36 more > Caused by: java.lang.ArrayIndexOutOfBoundsException: 1 > at > org.mvel2.optimizers.impl.refl.nodes.MethodAccessor.executeAll(MethodAccessor.java:140) > at > org.mvel2.optimizers.impl.refl.nodes.MethodAccessor.getValue(MethodAccessor.java:48) > ... 44 more > > > Example: My drl file looks like this - > > package test.system.rule; > > import test.platform.model.*; > import org.slf4j.Logger; > > global Logger logger; > > rule "Test Logger 1" > > when > > then > > logger.info("within test logger 1"); > > end > > rule "Test Logger 2" > > when > > then > > logger.info("within test logger 2. Rule fired {}", > drools.getRule().getName()); > > end > > > While rules are firing then the first logger is getting printed into > console > but second one is not getting printed and giving the above exception to > me. > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/Slf4j-Log4j-logger-not-working-with-Dro... > Sent from the Drools: User forum mailing list archive at Nabble.com. > _______________________________________________ > 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