Re: [rules-users] Unable to resolve token on function call with mvel dialect

Well ... I found something very strange with Drools and mvel dialect ... It looks like Drools doesn't like points in function parameters ! I made this very simple test with a log function and the easier rule you can have : function void log (String message) { System.out.println(message); } rule "test" no-loop when eval(true) then log("hello world") end log("hello world") works ok log("hello.world") (note the point) fails with this stack trace : org.drools.spi.ConsequenceException: org.mvel.UnresolveablePropertyException: unable to resolve token: log("hello.world") at org.drools.base.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:13) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:558) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:518) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:475) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:439) at t4.test.drools.TestRuleBase.executeRule(TestRuleBase.java:44) at t4.test.drools.Test1.testDebug(Test1.java:57) Caused by: org.mvel.UnresolveablePropertyException: unable to resolve token: log("hello.world") at org.mvel.ast.PropertyASTNode.initializePropertyNode(PropertyASTNode.java:129) at org.mvel.ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.java:24) at org.mvel.MVELRuntime.execute(MVELRuntime.java:90) at org.mvel.CompiledExpression.getValue(CompiledExpression.java:111) at org.mvel.MVEL.executeExpression(MVEL.java:235) at org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:48) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:554) ... 34 more It looks like there is a problem with point character, doesn't it ? Is it a known problem ? Regards, Olivier 2008/12/15 Olivier THIERRY <olivier.thierry(a)gmail.com&gt;: > Thanks Edson. Here it is : > > rule "CALCUL_RELICAT_CP" > salience 8 > no-loop > when > not $RELICAT_CP : VOCounter (code=="RELICAT_CP") > $startDate : RuleDate(name=="startDate") > $endDate : RuleDate(name=="endDate") > $SOLDE_CP_CUM : VOCounter ( code=="SOLDE_CP_CUM", > startDate.year == ($startDate.year - 1) ) > then > VOCounter $relicat = createCounter(drools,"RELICAT_CP",$SOLDE_CP_CUM.value); > insert($relicat); > insert(createCounter(drools,"SOLDE_RELICAT_CP",$SOLDE_CP_CUM.value)); > end > > I thought about trying with a newer version of mvel, but it doesn't > look so easy to upgrade it :( > > 2008/12/15 Edson Tirelli <tirelli(a)post.com&gt;: >> >> Can you plz show us the DRL instead of the DSLR for your rule? use the >> DRLViewer tab for that... >> >> 2008/12/15 Olivier THIERRY <olivier.thierry(a)gmail.com&gt; >>> >>> Hi, >>> >>> I use drools 4.0.7 and I encounter a problem calling a function from a >>> rule written for mvel dialect. >>> >>> The function I need to call has this signature : >>> >>> function VOCounter createCounter(org.drools.spi.KnowledgeHelper >>> drools, String code, Number number) >>> >>> When I call this function, I want to assign result to a variable, for >>> example to insert it to working memory later, or just to use it in >>> another function call. >>> So I wrote something like that (I am writing a DSL so part of the code is >>> DSL ): >>> >>> rule "CALCUL_RELICAT_CP" >>> salience 8 >>> no-loop >>> when >>> not There is a counter called "RELICAT_CP" >>> There is a date called "startDate" >>> There is a date called "endDate" >>> There is a counter called "SOLDE_CP_CUM" with >>> - start date is last year >>> then >>> > VOCounter $relicat = >>> > createCounter(drools,"RELICAT_CP",$SOLDE_CP_CUM.value); >>> > insert($relicat); >>> Copy counter $SOLDE_CP_CUM to SOLDE_RELICAT_CP >>> end >>> >>> But I have the following stack trace : >>> >>> org.drools.spi.ConsequenceException: >>> org.mvel.UnresolveablePropertyException: unable to resolve token: >>> createCounter(drools,"RELICAT_CP",$SOLDE_CP_CUM.value) >>> at >>> org.drools.base.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:13) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:558) >>> at >>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:518) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:475) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:439) >>> at >>> fr.horoquartz.t4.test.drools.TestRuleBase.executeRuleWithDsl(TestRuleBase.java:120) >>> at fr.horoquartz.t4.test.drools.Test1.testDsl(Test1.java:39) >>> Caused by: org.mvel.UnresolveablePropertyException: unable to resolve >>> token: createCounter(drools,"RELICAT_CP",$SOLDE_CP_CUM.value) >>> at >>> org.mvel.ast.PropertyASTNode.initializePropertyNode(PropertyASTNode.java:129) >>> at >>> org.mvel.ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.java:24) >>> at org.mvel.ExecutableAccessor.getValue(ExecutableAccessor.java:45) >>> at >>> org.mvel.ast.TypedVarNode.getReducedValueAccelerated(TypedVarNode.java:43) >>> at org.mvel.MVELRuntime.execute(MVELRuntime.java:90) >>> at >>> org.mvel.CompiledExpression.getValue(CompiledExpression.java:111) >>> at org.mvel.MVEL.executeExpression(MVEL.java:235) >>> at >>> org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:48) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:554) >>> ... 34 more >>> >>> What is strange is that it works if I don't assign function call >>> result to a variable. For example the following works : >>> >>> insert (createCounter(drools,"RELICAT_CP",$SOLDE_CP_CUM.value)); >>> >>> It also works if I assign $SOLDE_CP_CUM.value to a temporary variable >>> and use it for function call : >>> >>> Number $val = $SOLDE_CP_CUM.value; >>> VOCounter $relicat = createCounter(drools,"RELICAT_CP",$val); >>> insert($relicat); >>> >>> I had not this problem using java dialect. I understand nothing in >>> what happens ... Anyone has an idea what the problem is ? >>> >>> Thanks in advance, >>> >>> Olivier >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> -- >> Edson Tirelli >> JBoss Drools Core Development >> JBoss, a division of Red Hat @ www.jboss.com >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > > > -- > Seules 2 choses sont infinies : l'univers et la bêtise humaine ; et > encore pour l'univers, je ne suis pas sûr … (Einstein) > -- Seules 2 choses sont infinies : l'univers et la bêtise humaine ; et encore pour l'univers, je ne suis pas sûr … (Einstein) _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users