November 2013 - rules-users - Jboss List Archives

by forsakendoll

I'm very new to drools. I know this question is really a noob question but please bear with me. I'm using Spring MVC and I want to integrate drools expert to my project. What I've done so far is to integrate the hello world sample of drools expert. But now what I want to do is: 1. Send a bean to the rules for it to evaluate. 2. Modify the bean depending on the rules 3. Send it back to the controller to make a response to the user. I was able to do the number 1. But for number 2 and 3. I don't know how to do it. I want to have a nested rule. But now I'm only capable of doing this rule: global String $test; rule "Excellent" when $m: FLTBean ( listeningScore > 85 ) $p: FLTBean ( listeningScore < 101 ) then $test = "Excellent"; System.out.println( $test ); end I don't know yet how can I make a nested rule. Please give me a simple example that a newbie like me can understand. -- View this message in context: http://drools.46999.n3.nabble.com/Drools-in-a-web-application-tp4026704.html Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 5 months

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Where to cache KnowledgeAgent

by darrell.pittman

Hello, I am new to Drools a starting a new Java EE 6 application that will use drools. We are not using Guvnor. I am wondering what is the suggested way of creating the knowledge agent and where to cache it. EJB's shouldn't read from the file system so I guess a Singleton EJB is out as far as loading the knowledgebase goes. Should I load knowledgebase in a ServletContextListener and store it in the ServletContext and pass it into my EJB's? What is the recommend practice? -- View this message in context: http://drools.46999.n3.nabble.com/Where-to-cache-KnowledgeAgent-tp4026696... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 5 months

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Drools 6 workbench and Polymita

by gboro54

I stumbled across this article today: http://decisionmanagementsolutions.com/blog/2013/10/09/first-look-red-hat... This got me thinking if this integration will be offered in the community project or will this only be done in the enterprise version? If it is being done in the open source world is there a place you can take a look at it? -- View this message in context: http://drools.46999.n3.nabble.com/Drools-6-workbench-and-Polymita-tp40266... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 5 months

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How to forsee mid way planning team changes

by ns

Hi, I am working on a planning tool based on the nurse rostering example. I have encountered a problem which I do not know how to solve correctly. Our employees are divided into teams. But sometimes employees switch between teams, to for example cover the illness or pregnancy of a colleague. Each team has its own shifts. So for example Optaplanner may propose a roster for a month. In the middle of the month the employee changes team. I know this when I start the planning. But how do I tell Optaplanner that in the middle of the month the employee changes team and hence has different shifts? Thanks. Kind regards, Nick -- View this message in context: http://drools.46999.n3.nabble.com/How-to-forsee-mid-way-planning-team-cha... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 5 months

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Drools 5,3.1 with MVEL 2.1 Concurrency issue

by adarsh.chaini＠hsbcib.com

Hi , We have noted another incident in our testing environment where we have noted that there is a concurrency issue with the drools and mvel version we are using where the threads are blocked for a long time resulting the application node/JVM reach an unexpected state which needed to be restarted.Could some one look into this if there is a known defect on this and if it has been resolved in a later version?. Thread[DSLFpmlDataRecordKeepingTradeViewCacheWorker:5,5,DSLFpmlDataRecordKeepingTradeViewCache] java.util.WeakHashMap.get(WeakHashMap.java:470) org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:246) org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:224) org.mvel2.compiler.PropertyVerifier.getMethod(PropertyVerifier.java:509) org.mvel2.compiler.PropertyVerifier.analyze(PropertyVerifier.java:120) org.mvel2.compiler.ExpressionCompiler.verify(ExpressionCompiler.java:381) org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:273) org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) org.mvel2.MVEL.compileExpression(MVEL.java:810) org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:426) org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:243) org.drools.base.dataproviders.MVELDataProvider.compile(MVELDataProvider.java:83) org.drools.rule.MVELDialectRuntimeData.onBeforeExecute(MVELDialectRuntimeData.java:162) org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:138) org.drools.common.AbstractRuleBase.readExternal(AbstractRuleBase.java:295) org.drools.reteoo.ReteooRuleBase.readExternal(ReteooRuleBase.java:223) org.drools.impl.KnowledgeBaseImpl.readExternal(KnowledgeBaseImpl.java:116) java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1835) java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1794) java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348) java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) Thread[DSLFpmlDataRecordKeepingCacheWorker:39,5,DSLFpmlDataRecordKeepingCache] java.util.WeakHashMap.expungeStaleEntries(WeakHashMap.java:386) java.util.WeakHashMap.getTable(WeakHashMap.java:417) java.util.WeakHashMap.get(WeakHashMap.java:464) org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:246) org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:224) org.mvel2.compiler.PropertyVerifier.getMethod(PropertyVerifier.java:509) org.mvel2.compiler.PropertyVerifier.analyze(PropertyVerifier.java:120) org.mvel2.compiler.ExpressionCompiler.verify(ExpressionCompiler.java:381) org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:273) org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) org.mvel2.MVEL.compileExpression(MVEL.java:810) org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:426) org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:243) org.drools.base.mvel.MVELPredicateExpression.compile(MVELPredicateExpression.java:69) org.drools.rule.MVELDialectRuntimeData.onBeforeExecute(MVELDialectRuntimeData.java:162) org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:138) org.drools.common.AbstractRuleBase.readExternal(AbstractRuleBase.java:295) org.drools.reteoo.ReteooRuleBase.readExternal(ReteooRuleBase.java:223) org.drools.impl.KnowledgeBaseImpl.readExternal(KnowledgeBaseImpl.java:116) java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1835) java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1794) java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348) java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) We have found a similar BUG in the drools defect database https://issues.jboss.org/i#browse/DROOLS-81 but the scenarios are bit different. In our case it has happened when we deserialize the serilized KnowledgeBaseImpl by multiple threads and it seems that the problem is due to usage of a java.util.WeakHashMap as a class variable in org.mvel2.util.ParseTools.getBestCandidate(ParseTools.java:246) Thanks & Regards, Adarsh SENIOR LEAD DEVELOPMENT SPECIALIST SCJP, SCWCD FINANCE TECHNOLOGY HSBC BANK PLC HBEU 8 Canada Square,Canary Wharf, London,E14 5HQ,United Kingdom ------------------------------------------------------ Phone +44 207914720 Mobile 07595530105 Email. adarsh.chaini(a)hsbcib.com ________________________________ From: Imran Shafiq <ishafiq(a)redhat.com> To: Adarsh CHAINI/IBEU/HSBC@HSBC Date: 17/09/2013 18:55 Subject: Drools Community Issue. Hi Ardash, I've seen details of the recent issue you have experienced with the community Drools product; I was keen to contact you regarding this. We have been a strategic and global supplier to HSBC for many years, and have built our success largely on our ability to provide full enterprise services and productised versions of community products, that are fit for enterprise use. In the case of community Drools, our productised version (JBoss BRMS) provides a full testing, certification, commercial assurance eco-system, and 24*7 SLA support service - which would appear to be ideally positioned to help address issues such as that which you are currently experiencing. Ardash, given the appetite of HSBC to mitigate the risk associated with the use of community software alone, I would welcome the opportunity to have a brief initial conversation with you concerning the above. Might there be a suitable number for me to reach you in the coming days? Kind regards Imran Imran Shafiq Strategic & Global Accounts Team Red Hat UK Direct: +44 (0) 1252 362766 Mobile: +44 (0) 7506 765 287 ishafiq(a)redhat.com www.europe.redhat.com ************************************************************ HSBC Bank plc may be solicited in the course of its placement efforts for a new issue, by investment clients of the firm for whom the Bank as a firm already provides other services. It may equally decide to allocate to its own proprietary book or with an associate of HSBC Group. This represents a potential conflict of interest. HSBC Bank plc has internal arrangements designed to ensure that the firm would give unbiased and full advice to the corporate finance client about the valuation and pricing of the offering as well as internal systems, controls and procedures to identify and manage conflicts of interest. HSBC Bank plc Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom Registered in England - Number 14259 Authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority ************************************************************ ----------------------------------------- SAVE PAPER - THINK BEFORE YOU PRINT! This transmission has been issued by a member of the HSBC Group "HSBC" for the information of the addressee only and should not be reproduced and/or distributed to any other person. Each page attached hereto must be read in conjunction with any disclaimer which forms part of it. Unless otherwise stated, this transmission is neither an offer nor the solicitation of an offer to sell or purchase any investment. Its contents are based on information obtained from sources believed to be reliable but HSBC makes no representation and accepts no responsibility or liability as to its completeness or accuracy.

11 years, 5 months

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Set $WORKING_DIRECTORY for drools workbench 6

by xat

Hello everyone, How can I set the $WORKING_DIRECTORY for the drools workbench 6, so it will store repository there? Also documentation mentions that parameters like org.uberfire.nio.git.dir can be set in $JBOSS_HOME/domain/configuration/host.xml <system-properties> <property name="org.uberfire.nio.git.dir" value="..." boot-time="false"/> </system-properties> How do I have to set them in tomcat7? BR, Roman -- View this message in context: http://drools.46999.n3.nabble.com/Set-WORKING-DIRECTORY-for-drools-workbe... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 5 months

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How I18N is built in droolsjbpm workbench projects

by Toshiya Kobayashi

Hello, To help those who are interested in I18N of droolsjbpm workbench, I have posted a wiki page about build tips. https://community.jboss.org/wiki/HowI18NIsBuiltInDroolsjbpmWorkbenchProjects Feel free to update the page if you want to correct / add information. Cheers, Toshiya

11 years, 5 months

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lock-on-active

by Stephen Masters

Hi folks, According to the user guide, lock-on-active “inhibits additional activations of all rules with this flag set within the same rule flow or agenda group”. I was doing a little testing of some rules earlier today, and noticed that lock-on-active seems to change behaviour when applied to rules which don’t have an agenda-group or rules flow-group defined. It also seemed to have a slightly inconsistent effect, although that may just be me not realising what it’s supposed to do. There doesn’t appear to be any documentation of what the attribute means when a rule is not part of a rule flow or agenda group. So I was wondering whether perhaps there is an expected/official behaviour, which is just not documented. Or is lock-on-active without a rule flow or agenda group an error? In which case is there a reason why it doesn’t cause a compilation error when the knowledge base is built? Yours curiously... Steve

11 years, 5 months

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Optaplanner JAXB

by Jugu Dannie

The optaplanner uses XStream for reading the solver configuration from XML. For using JAXB instead, is it sufficient to have custom implementation of XMLSolverFactory and SolverConfig?

11 years, 5 months

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Rule Example

by chakez30

I have some requirements regarding with my final project can someone help me formulate the rules? Thanks! -- View this message in context: http://drools.46999.n3.nabble.com/Rule-Example-tp4026674.html Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 5 months

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rules-users November 2013