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

Sorry, I had not seen there was later version than 1.3.9. Anyway, I tried with 1.3.12 and had the same problem. >From 1.3.13, it looks like there is a problem on mvel initialization since I have this stack trace : java.lang.NoSuchMethodError: org.mvel.MVEL.setThreadSafe(Z)V at org.drools.rule.builder.dialect.mvel.MVELDialect.init(MVELDialect.java:144) at org.drools.compiler.DialectRegistry.initAll(DialectRegistry.java:49) at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:146) at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:86) at t4.test.drools.TestRuleBase.executeRuleWithDsl(TestRuleBase.java:105) at t4.test.drools.Test1.testDslMvel(Test1.java:39) 2008/12/16 Olivier THIERRY <olivier.thierry(a)gmail.com&gt;: > I use mvel 1.3.9, so the latest 1.3.x version. > Is there a way to upgrade to mvel 2.x with drools 4.0.7 ? Or will I > have to wait for drools 5.0.0 ? > > 2008/12/15 Edson Tirelli <tirelli(a)post.com&gt;: >> >> 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 >> >> > > > > -- > 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