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

BTW, what version of MVEL are you using? 2008/12/15 Olivier THIERRY <olivier.thierry(a)gmail.com&gt; > > 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 -- 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