Re: [rules-users] Drools Guvnor: java.lang.ClassCastException: [Lorg.drools.rule.Package; cannot be cast to org.drools.rule.Package
by Michael Anstis
I suspect the version of drools and guvnor you are using are not identical.
Use of RuleAgent is most certainly not helping. Did you look at the
/droolsjbpm/guvnor/guvnor-examples demonstration using KnowledgeAgent?
On 29 November 2012 12:59, Hushen Savani <hushen.savani(a)elitecore.com>wrote:
> *Hi Team, *
>
> * *
>
> * **I'm a newbie to Drools. Please help me here. *
>
> * *
>
> *1. I have created a Package named "org.sample". *
>
> * *
>
> *2. I have created a Model named "TestModel" in the same package. *
>
> * *
>
> *3. I have created a Fact named "Number" in the same Model. *
>
> * *
>
> *4. "Number" fact is as following: *
>
> ** **
>
> [image: Fact]****
>
> ** **
>
> *5. Then I have created a category named "TestCategory". *
>
> * *
>
> *6. Then created a sample Rule named "ruletest" in that category. *
>
> * *
>
> *7. Rule is created as following:*
>
> ** **
>
> *rule "numberone is equal to numbertwo"*
>
> * when*
>
> * n : Number(numberone == numbertwo);*
>
> * then*
>
> * n.setMessage("numberone is equal to numbertwo");*
>
> *end *
>
> * *
>
> *rule "numberone is greater than numbertwo"*
>
> * when*
>
> * n : Number(numberone > numbertwo);*
>
> * then*
>
> * n.setMessage("numberone is greater than
> numbertwo");*
>
> *end*
>
> * *
>
> *rule "numberone is less than numbertwo"*
>
> * when*
>
> * n : Number(numberone < numbertwo);*
>
> * then*
>
> * n.setMessage("numberone is less than numbertwo");
> *
>
> *end*
>
> * *
>
> * 8. Built the package and created the snapshot. *
>
> * *
>
> *9. Wrote a JAVA POJO client as following: *
>
> * *
>
> *package* org.sample;****
>
> ** **
>
> *import* org.drools.RuleBase;****
>
> *import* org.drools.WorkingMemory;****
>
> *import* org.drools.agent.RuleAgent;****
>
> *import* org.drools.definition.type.FactType;****
>
> ** **
>
> *public* *class* DroolGuvnor {****
>
> *public* *static* *void* main(String[] args) *throws*InstantiationException, IllegalAccessException {
> ****
>
> RuleAgent ruleAgent = RuleAgent.*newRuleAgent*(
> "/Guvnor.properties");****
>
> RuleBase ruleBase = ruleAgent.getRuleBase();****
>
> ****
>
> FactType factType = ruleBase.getFactType("org.sample.Number");
> ****
>
> Object obj = factType.newInstance();****
>
> ****
>
> factType.set(obj, "numberone", 2);****
>
> factType.set(obj, "numbertwo", 1);****
>
> ****
>
> WorkingMemory workingMemory = ruleBase.newStatefulSession();**
> **
>
> workingMemory.insert(obj);****
>
> workingMemory.fireAllRules();****
>
> ****
>
> System.*out*.println(factType.get(obj, "message"));****
>
> }****
>
> }****
>
> * *
>
> * *
>
> * 10. The "guvnor.properties" file is as following: *
>
> * *
>
> url=
> http://localhost:10080/guvnor-5.5.0.Final-tomcat-6.0/org.drools.guvnor.Gu...
> ****
>
> enableBasicAuthentication=true****
>
> username=*admin*****
>
> password=*admin*****
>
> name=*drooltest***
>
> * *
>
> * 11. But, when I run the client, I get following exception: *
>
> * *
>
> SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".****
>
> SLF4J: Defaulting to no-operation (NOP) logger implementation****
>
> SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further
> details.****
>
> Exception in thread "main" *java.lang.ClassCastException*:
> [Lorg.drools.rule.Package; cannot be cast to org.drools.rule.Package****
>
> at org.drools.agent.HttpClientImpl.fetchPackage(*
> HttpClientImpl.java:86*)****
>
> at org.drools.agent.URLScanner.readPackage(*URLScanner.java:171*)***
> *
>
> at org.drools.agent.URLScanner.getChangeSet(*URLScanner.java:143*)**
> **
>
> at org.drools.agent.URLScanner.loadPackageChanges(*
> URLScanner.java:119*)****
>
> at org.drools.agent.RuleAgent.checkForChanges(*RuleAgent.java:431*)*
> ***
>
> at org.drools.agent.RuleAgent.refreshRuleBase(*RuleAgent.java:383*)*
> ***
>
> at org.drools.agent.RuleAgent.configure(*RuleAgent.java:368*)****
>
> at org.drools.agent.RuleAgent.init(*RuleAgent.java:268*)****
>
> at org.drools.agent.RuleAgent.newRuleAgent(*RuleAgent.java:208*)****
>
> at org.drools.agent.RuleAgent.newRuleAgent(*RuleAgent.java:168*)****
>
> at org.drools.agent.RuleAgent.newRuleAgent(*RuleAgent.java:277*)****
>
> at org.sample.DroolGuvnor.main(*DroolGuvnor.java:10*)****
>
> ** **
>
> *Please help on this. Thanks. *
>
> * *
>
> * *
>
> *Best Regards, *
>
> *Hushen Savani*
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
13 years, 3 months
Drools Guvnor: java.lang.ClassCastException: [Lorg.drools.rule.Package; cannot be cast to org.drools.rule.Package
by hushen.savani
Hi Team, I'm a newbie to Drools. Please help me here. 1. I have
created a Package named "org.sample". 2. I have created a Model named
"TestModel" in the same package. 3. I have created a Fact named "Number"
in the same Model. 4. "Number" fact is as following:
<http://drools.46999.n3.nabble.com/file/n4021008/01_Fact.bmp> 5. Then I
have created a category named "TestCategory". 6. Then created a sample
Rule named "ruletest" in that category. 7. Rule is created as
following:*rule "numberone is equal to numbertwo" when n : Number(numberone
== numbertwo); then n.setMessage("numberone is equal to numbertwo");end
rule "numberone is greater than numbertwo" when n : Number(numberone >
numbertwo); then n.setMessage("numberone is greater than
numbertwo");endrule "numberone is less than numbertwo" when n :
Number(numberone < numbertwo); then n.setMessage("numberone is less than
numbertwo");end* 8. Built the package and created the snapshot. 9.
Wrote a JAVA POJO client as following:*package org.sample;import
org.drools.RuleBase;import org.drools.WorkingMemory;import
org.drools.agent.RuleAgent;import org.drools.definition.type.FactType;public
class DroolGuvnor { public static void main(String[] args) throws
InstantiationException, IllegalAccessException { RuleAgent ruleAgent =
RuleAgent.newRuleAgent("/Guvnor.properties"); RuleBase ruleBase =
ruleAgent.getRuleBase(); FactType factType =
ruleBase.getFactType("org.sample.Number"); Object obj =
factType.newInstance(); factType.set(obj, "numberone", 2);
factType.set(obj, "numbertwo", 1); WorkingMemory workingMemory =
ruleBase.newStatefulSession(); workingMemory.insert(obj);
workingMemory.fireAllRules(); System.out.println(factType.get(obj,
"message")); }}* 10. The "guvnor.properties" file is as
following:*url=http://localhost:10080/guvnor-5.5.0.Final-tomcat-6.0/org.drools.guvnor.Guvnor/package/org.sample/TestSnapshotenableBasicAuthentication=trueusername=adminpassword=adminname=drooltest*
10. When I run the client, I get following exception:*SLF4J: Failed to load
class "org.slf4j.impl.StaticLoggerBinder".SLF4J: Defaulting to no-operation
(NOP) logger implementationSLF4J: See
http://www.slf4j.org/codes.html#StaticLoggerBinder for further
details.Exception in thread "main" java.lang.ClassCastException:
[Lorg.drools.rule.Package; cannot be cast to org.drools.rule.Package at
org.drools.agent.HttpClientImpl.fetchPackage(HttpClientImpl.java:86) at
org.drools.agent.URLScanner.readPackage(URLScanner.java:171) at
org.drools.agent.URLScanner.getChangeSet(URLScanner.java:143) at
org.drools.agent.URLScanner.loadPackageChanges(URLScanner.java:119) at
org.drools.agent.RuleAgent.checkForChanges(RuleAgent.java:431) at
org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:383) at
org.drools.agent.RuleAgent.configure(RuleAgent.java:368) at
org.drools.agent.RuleAgent.init(RuleAgent.java:268) at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:208) at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:168) at
org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:277) at
org.sample.DroolGuvnor.main(DroolGuvnor.java:10)*Please help on this.
Thanks.Best Regards,Hushen Savani
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13 years, 3 months
Re: [rules-users] rules-users Digest, Vol 72, Issue 55
by Gurvinder Narula1
Hi Mattias,
Thanks for the clarification. Appreciate the quick response.
Gurvinder
On 11/27/12 12:00 PM, "rules-users-request(a)lists.jboss.org"
<rules-users-request(a)lists.jboss.org> wrote:
>Send rules-users mailing list submissions to
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>When replying, please edit your Subject line so it is more specific
>than "Re: Contents of rules-users digest..."
>
>
>Today's Topics:
>
> 1. Drools response time (elMateo)
> 2. Re: Drools response time (Mauricio Salatino)
> 3. Re: Drools response time (Luk?? Petrovick?)
> 4. Re: Drools response time (elMateo)
> 5. Re: Question about drools-spring in a multi-treaded container
> (like tomcat). (Mattias Nilsson Grip)
> 6. Re: Inserting Different Objects Of Same Class ! (Greg Barton)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Tue, 27 Nov 2012 16:06:58 +0100
>From: elMateo <soyelmateo(a)gmail.com>
>Subject: [rules-users] Drools response time
>To: Rules Users List <rules-users(a)lists.jboss.org>
>Message-ID:
> <CAKx6_9aEY2GEYoY0LmWUcW2DyyPYmX_sAAFr=Ou_u4dxuB4jmQ(a)mail.gmail.com>
>Content-Type: text/plain; charset="iso-8859-1"
>
>Dear all,
>
>I need to develop an Expert System for a new project and I want to use
>Drools, butI have some restrictions.
>
>The most important restriction: response time of the application must be
>less than one second. Also, the application access to one data base to
>retrieve some information and send it to the expert systetm.
>
>With this information, can anyone tell me, approximately, the response
>time
>of Drools? It is very important to can use Drools in this project. And we
>like very much to use it. (We use in other projects without these
>restrictions).
>
>Thank in advance.
>
>Best regards, Jes?s.
>
13 years, 3 months
Drools response time
by elMateo
Dear all,
I need to develop an Expert System for a new project and I want to use
Drools, butI have some restrictions.
The most important restriction: response time of the application must be
less than one second. Also, the application access to one data base to
retrieve some information and send it to the expert systetm.
With this information, can anyone tell me, approximately, the response time
of Drools? It is very important to can use Drools in this project. And we
like very much to use it. (We use in other projects without these
restrictions).
Thank in advance.
Best regards, Jesús.
13 years, 3 months
stuck! Unknown accessor type: org.mvel2.optimizers.impl.refl.collection.ArrayCreator@690c2a7a
by mohdejaz74
Has anyone come across this issue ...
I really need to get this issue fixed.
Any advice would be helpful!
Exception in thread "Thread-163" java.lang.RuntimeException: Unknown
accessor type:
org.mvel2.optimizers.impl.refl.collection.ArrayCreator@690c2a7a
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeAccessor(ConditionAnalyzer.java:246)
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeNode(ConditionAnalyzer.java:232)
at
org.drools.rule.constraint.ConditionAnalyzer.statementToExpression(ConditionAnalyzer.java:449)
at
org.drools.rule.constraint.ConditionAnalyzer.readInvocationParams(ConditionAnalyzer.java:432)
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeAccessor(ConditionAnalyzer.java:327)
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeExpressionNode(ConditionAnalyzer.java:308)
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeAccessor(ConditionAnalyzer.java:268)
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeNode(ConditionAnalyzer.java:232)
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeSingleCondition(ConditionAnalyzer.java:109)
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:102)
at
org.drools.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:73)
at
org.drools.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:83)
at
org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:218)
at
org.drools.rule.constraint.MvelConstraint.access$000(MvelConstraint.java:41)
at org.drools.rule.constraint.MvelConstraint$1.run(MvelConstraint.java:202)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
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13 years, 3 months
JPA vs Marshaller for session persistence
by magnusv
Are there any disadvantages to using the Marshaller instead of JPA for
persistence?
We are running Drools as an embedded service, and we would favor the
Marshaller because we don't want to handle the persisting of the session id
between system reboots. We're currently not using JPA in our system, and it
seems unnecessary to add it just for Drools.
In which scenarios would it be appropriate to use JPA and Marshalling
respectively?
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13 years, 3 months
