May 2011 - rules-dev - Jboss List Archives

Two Day Drools and jBPM Workshop (Argentina June)

by Mark Proctor

http://blog.athico.com/2011/05/2-day-drools-and-jbpm-workshop.html Thanks to OSDE we now have a 2 day workshop planned in Argetina for June, with nearly all the core drools and jbpm developers. A MUST attend event for any developer in South America. We are just finalising locations, agendas and speakers, we'll give more firm details later, but initially the line up is as follows: Where: Argentina (Buenos Aries) Date: 16-17 June (Thu/Fri) Speakers: Mark Proctor - Group Lead and Drools co-founder Kris Verlaenen - jBPM Lead Edson Tirelli - Drools tech Lead Geoffrey De Smet - Planner Lead Michael Anstis - Business Tooling tech lead Ray Ploski - Solutions Architect Guest Speakers (so far) Salatino Mauricio (Plugtree) While us core developers will be focusing on Drools and jBPM, Ray will be there to do talks on AS7, Seam and Infinispan.

15 years

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new binding - what't its purpose?

by Wolfgang Laun

rule exornot when Number( $iCount: intValue ) from accumulate ( Fact( x > 0 ), $c: count(1) ) then System.out.println( "count = " + $c ); end There's no way $c can be used in RHS code (5.3.0, current). Is this the intended behaviour? Where can it be used? -W

15 years

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ResourceFactory: make setFactoryService() public?

by Laird Nelson

Would you consider making the setFactoryService() method in ResourceFactory be public? My Drools-as-a-JEE-compliant-resource-adapter project currently needs to invoke this through a setAccessible() hack: http://code.google.com/p/drools-jca/source/browse/trunk/drools-jca/src/ma... This is because I'm attempting to (ultimately) override the usage of Threads and re-express the asynchronous intent of the KnowledgeAgent by using container APIs such as Timer, WorkManager, etc. My project does this successfully, but I had to hack access to this method to do it. There is a constructor in ProcessChangeSet as well that I think should be public. Currently I get at it like this: final Constructor<ProcessChangeSet> c = ProcessChangeSet.class.getDeclaredConstructor(LinkedBlockingQueue.class, ResourceChangeNotifierImpl.class, SystemEventListener.class); assert c != null; c.setAccessible(true); Looking forward to the discussion, Laird

15 years

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Project Idea - Guvnor Refactoring

by Mark Proctor

Eclipse refactoring can work in headless mode. We already have some code to analyse drls and get used classes and fields. 1) store all used classes and fields in a database 2) when a class refactoring is attempted use the database in 1) to select all the potentially impacted files and put them into a headless eclipse project 3) apply the refactoring and show the results to the user who may decline/accept(with commit comments) them. Accepting them results in each changed file being committed and the version increased. 4) allow additional work hooks, like deployment migration wizards/scripts to know what has changed as part of that patch. Any volunteers? I think the used fields currently only works on direct field accessors, bonus points will be needed to analyse expressions to also get the used classes and fields. Simples :) Mark

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Sequence Diagram

by Pablo Elo

Hi everyone, my name is Pablo, I work with Antoine's team at Intalio and I have some document on google docs that I would like to share with you. It's a sequence diagram I created when I was trying to understand how jBPM works. It only shows a test case's sequence and it's already old, but still it might help someone in the same situation in the future. I hope it is of use for someone. https://docs2.google.com/a/intalio.com/drawings/d/1f9B8lVsbpiMytfgAjjAsV8... <https://docs2.google.com/a/intalio.com/drawings/d/1f9B8lVsbpiMytfgAjjAsV8...> Regards. -- Pablo Elo. Developer at Intalio Argentina.

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Re: [rules-dev] [rules-users] Facing Problem in BRL

by Wolfgang Laun

There is some code in 5.1.1 org/drools/eclipse/rulebuilder/editors/RuleEditor.java that creates a file "drools.package" with if ( !file.exists() ) { String defaultHeader = "//This is a package configuration file"; defaultHeader += "\n//Add imports, globals etc here which will be used by all the rule assets in this folder."; InputStream is = new ByteArrayInputStream( defaultHeader.getBytes() ); Note the missing newline at the end of defaultHeader. -W 2011/5/18 Michael Anstis <michael.anstis(a)gmail.com> > //Add imports, globals etc here which will be used by all the rule assets > in this folder. > > should be on one line, or add another comment marker at the start of the > second line, e.g.:- > > > //Add imports, globals etc here which will be used by all the rule assets > in this folder. > > //Add imports, globals etc here which will be used by all the rule assets > // in this folder. > > 2011/5/18 Abhay B. Chaware <Abhay.Chaware(a)kpitcummins.com> > > I was able to reproduce your error … J try adding a new line ( enter ) >> after the comment in the drools.package …. Or just remove the commented >> line “//Add imports, globals etc here which will be used by all the rule >> assets in this folder.” >> >> >> >> Your rule name is getting ‘commented out’ ……… >> >> >> >> -abhay >> >> *-----------------------* >> >> * * >> >> * * >> >> * * >> >> *From:* rules-users-bounces(a)lists.jboss.org [mailto: >> rules-users-bounces(a)lists.jboss.org] *On Behalf Of *Michael Anstis >> *Sent:* Wednesday, May 18, 2011 2:53 PM >> >> *To:* Rules Users List >> *Subject:* Re: [rules-users] Facing Problem in BRL >> >> >> >> This looks rogue:- >> >> //Add imports, globals etc here which will be used by all the rule assets >> in this folder >> >> Can you post the content of your drools.packages file? >> >> On 18 May 2011 10:19, Sumeet Karawal <sumeet.karawal(a)tcs.com> wrote: >> >> This is the output that I get : >> >> //This is a package configuration file >> >> package com.rules; >> >> import com.model.PersonDetails; >> >> //Add imports, globals etc here which will be used by all the rule assets >> in this folder.rule "example" >> dialect "mvel" >> when >> $person : PersonDetails( age < "20" ) >> >> then >> $person.setDiscount( 10 ); >> end >> >> java.lang.RuntimeException: [8,1]: [ERR 102] Line 8:1 mismatched input >> 'WHEN' >> >> Regards, >> Sumeet Karawal >> Mailto: sumeet.karawal(a)tcs.com >> >> >> >> From: "Abhay B. Chaware" <Abhay.Chaware(a)kpitcummins.com> >> >> To: Rules Users List <rules-users(a)lists.jboss.org> >> >> Date: 05/18/2011 02:47 PM >> >> >> Subject: Re: [rules-users] Facing Problem in BRL >> >> Sent by: rules-users-bounces(a)lists.jboss.org >> >> >> >> >> >> >> Can you write the outputDRL to System.out and check if the generated DRL >> syntax is correct ? >> >> System.out.println(outputDRL); >> >> Before instantiating KnowledgeBuilder >> >> >> >> >> -----Original Message----- >> From: rules-users-bounces(a)lists.jboss.org [ >> mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sumeet Karawal >> Sent: Wednesday, May 18, 2011 2:42 PM >> To: Rules Users List >> Subject: Re: [rules-users] Facing Problem in BRL >> >> I tried to use this also but now I am getting different error: >> java.lang.RuntimeException: [8,1]: [ERR 102] Line 8:1 mismatched input >> 'WHEN' >> >> >> Also, what is the significance of the first line. I have copied it as the >> same. >> >> My code is : >> >> String curDir = System.getProperty("user.dir"); >> String fileName = curDir + "\\src\\com\\rules >> \\drools.package"; >> String rulePackageContent = FileUtils.readFileToString(new >> File >> (fileName)); >> fileName = curDir + "\\src\\com\\rules\\example.brl"; >> String brl = FileUtils.readFileToString(new >> File(fileName)); >> BRLPersistence read = BRXMLPersistence.getInstance(); >> BRLPersistence write = BRDRLPersistence.getInstance(); >> String outputDRL = rulePackageContent + write.marshal >> (read.unmarshal >> (brl)); >> KnowledgeBuilder builder = KnowledgeBuilderFactory. >> newKnowledgeBuilder(); >> builder.add(ResourceFactory.newReaderResource(new >> StringReader >> (outputDRL)), ResourceType.DRL); >> >> >> if (builder.hasErrors()) { >> throw new RuntimeException (builder.getErrors().toString ()); >> } >> KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase(); >> knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages ()); >> >> I don't know where I am getting this wrong. >> >> Regards, >> Sumeet Karawal >> Mailto: sumeet.karawal(a)tcs.com >> >> >> >> From: "Abhay B. Chaware" <Abhay.Chaware(a)kpitcummins.com> >> >> >> To: Rules Users List <rules-users(a)lists.jboss.org> >> >> >> Date: 05/18/2011 01:09 PM >> >> >> Subject: Re: [rules-users] Facing Problem in BRL >> >> >> Sent by: rules-users-bounces(a)lists.jboss.org >> >> >> >> >> >> >> >> I haven't been able to get "ResourceType.BRL" to work. This is how I do >> it .. >> >> String curDir = System.getProperty("user.dir"); >> String fileName = curDir + "\\src\\main\\rules\\drools.package"; >> String rulePackageContent = FileUtils.readFileToString(new >> File(fileName)); >> >> fileName = curDir + "\\src\\main\\rules\\eligibility.brl"; >> String brl = FileUtils.readFileToString(new File(fileName)); >> BRLPersistence read = BRXMLPersistence.getInstance(); >> BRLPersistence write = BRDRLPersistence.getInstance(); >> String outputDRL = rulePackageContent + >> write.marshal(read.unmarshal(brl)); >> >> KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); >> kbuilder.add(ResourceFactory.newReaderResource(new StringReader >> (outputDRL)), ResourceType.DRL); >> >> >> Try this. >> >> >> -abhay >> >> -----Original Message----- >> From: rules-users-bounces(a)lists.jboss.org [ >> mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sumeet Karawal >> Sent: Wednesday, May 18, 2011 11:47 AM >> To: Rules Users List >> Subject: Re: [rules-users] Facing Problem in BRL >> >> This is the brl that I have created: >> >> >> (Embedded image moved to file: pic18001.jpg) >> >> >> Regards, >> Sumeet Karawal >> Mailto: sumeet.karawal(a)tcs.com >> >> >> >> From: "Abhay B. Chaware" <Abhay.Chaware(a)kpitcummins.com> >> >> >> To: Rules Users List <rules-users(a)lists.jboss.org> >> >> >> Date: 05/18/2011 11:42 AM >> >> >> Subject: Re: [rules-users] Facing Problem in BRL >> >> >> Sent by: rules-users-bounces(a)lists.jboss.org >> >> >> >> >> >> >> >> Could you post your rule content here ? >> >> >> -----Original Message----- >> From: rules-users-bounces(a)lists.jboss.org [ >> mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sumeet Karawal >> Sent: Wednesday, May 18, 2011 11:38 AM >> To: rules-users(a)lists.jboss.org >> Subject: [rules-users] Facing Problem in BRL >> >> >> Hi, >> >> I am using Drools-Expert. I am having a class "Person" with data members >> as >> age and discount. >> I am trying to create a .brl. I have these statements in drools.package >> package com.rules; >> >> import com.model.PersonDetails; >> >> >> and in the example.brl I am providing the details of when and then >> conditions >> >> but on execution I am getting the following error : >> >> java.lang.RuntimeException: [4] Unable to expand: PersonDetails( age < >> "20" )[6] Unable to expand: >> PersonDetails fact0 = new >> PersonDetails >> ();[7] Unable to expand: >> fact0.setDiscount >> ( 10 );[8] Unable to >> expand: >> insert(fact0 ); >> >> >> It would be helpful is somebody guide me on how execute it. >> >> Also, I am creating the knowledgebase as: >> >> private static KnowledgeBase createKnowledgeBase() { >> KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder(); >> builder.add (ResourceFactory.newClassPathResource( >> "com/rules/example.brl"),ResourceType.BRL); >> if (builder.hasErrors()) { >> throw new RuntimeException (builder.getErrors().toString ()); >> } >> KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase(); >> knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages ()); >> return knowledgeBase;} >> >> >> Thanks & Regards, >> Sumeet Karawal >> CEG - Open Source Technology Group >> Tata Consultancy Services >> Ph:- +912267782556 >> Cell:- +919833236440 >> Mailto: sumeet.karawal(a)tcs.com >> Website: http://www.tcs.com >> ____________________________________________ >> Experience certainty. >> IT >> Services >> >> Business Solutions >> >> Outsourcing >> ____________________________________________ >> >> =====-----=====-----===== >> Notice: The information contained in this e-mail >> message and/or attachments to it may contain >> confidential or privileged information. If you are >> not the intended recipient, any dissemination, use, >> review, distribution, printing or copying of the >> information contained in this e-mail message >> and/or attachments to it are strictly prohibited. If >> you have received this communication in error, >> please notify us by reply e-mail or telephone and >> immediately and permanently delete the message >> and any attachments. Thank you >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> =====-----=====-----===== >> Notice: The information contained in this e-mail >> message and/or attachments to it may contain >> confidential or privileged information. If you are >> not the intended recipient, any dissemination, use, >> review, distribution, printing or copying of the >> information contained in this e-mail message >> and/or attachments to it are strictly prohibited. If >> you have received this communication in error, >> please notify us by reply e-mail or telephone and >> immediately and permanently delete the message >> and any attachments. Thank you >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> =====-----=====-----===== >> Notice: The information contained in this e-mail >> message and/or attachments to it may contain >> confidential or privileged information. If you are >> not the intended recipient, any dissemination, use, >> review, distribution, printing or copying of the >> information contained in this e-mail message >> and/or attachments to it are strictly prohibited. If >> you have received this communication in error, >> please notify us by reply e-mail or telephone and >> immediately and permanently delete the message >> and any attachments. Thank you >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> =====-----=====-----===== >> Notice: The information contained in this e-mail >> message and/or attachments to it may contain >> confidential or privileged information. If you are >> not the intended recipient, any dissemination, use, >> review, distribution, printing or copying of the >> information contained in this e-mail message >> and/or attachments to it are strictly prohibited. If >> you have received this communication in error, >> please notify us by reply e-mail or telephone and >> immediately and permanently delete the message >> and any attachments. Thank you >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> This message contains information that may be privileged or confidential >> and is the property of the KPIT Cummins Infosystems Ltd. It is intended only >> for the person to whom it is addressed. If you are not the intended >> recipient, you are not authorized to read, print, retain copy, disseminate, >> distribute, or use this message or any part thereof. If you receive this >> message in error, please notify the sender immediately and delete all copies >> of this message. KPIT Cummins Infosystems Ltd. does not accept any liability >> for virus infected mails. >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > >

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writing unit tests

by Mark Proctor

It's great when people attach unit tests to jiras, it would be ever better if they are just cut nad paste single files, rather than entire projects, which take more time for us to fiddle with. Also please do try and pair your actual program "main" examples down to minimal unit tests of the actual problem. If you suspect the problem is MVEL, then please do a minimal MVEL test, without Drools. Put static classes in the same file, put rules in a concatenated string. This means testing is as easy as cut and paste for us, and it can be easily added to existing test classes. For example, from MiscTest. public static class A { private String field1; private String field2; public A(String field1, String field2) { this.field1 = field1; this.field2 = field2; } public String getField1() { return field1; } public void setField1( String field1 ) { this.field1 = field1; } public String getField2() { return field2; } public void setField2( String field2 ) { this.field2 = field2; } public String toString() { return "A) " + field1 + ":" + field2; } } @Test public void testExistsIterativeModifyBug() { // JBRULES-2809 // This bug occurs when a tuple is modified, the remove/add puts it onto the memory end // However before this was done it would attempt to find the next tuple, starting from itself // This meant it would just re-add itself as the blocker, but then be moved to end of the memory // If this tuple was then removed or changed, the blocked was unable to check previous tuples. String str = ""; str += "package org.simple \n"; str += "import " + A.class.getCanonicalName() + "\n"; str += "global java.util.List list \n"; str += "rule xxx \n"; str += "when \n"; str += " $f1 : A() \n"; str += " exists A(this != $f1, eval(field2 == $f1.getField2())) \n"; str += " eval( !$f1.getField1().equals(\"1\") ) \n"; str += "then \n"; str += " list.add($f1); \n"; str += "end \n"; KnowledgeBase kbase = loadKnowledgeBaseFromString( str ); StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); List list = new ArrayList(); ksession.setGlobal( "list", list ); A a1 = new A( "2", "2" ); A a2 = new A( "1", "2" ); A a3 = new A( "1", "2" ); FactHandle fa1 = (FactHandle) ksession.insert( a1 ); FactHandle fa2 = (FactHandle) ksession.insert( a2 ); FactHandle fa3 = (FactHandle) ksession.insert( a3 ); // a2, a3 are blocked by a1 // modify a1, so that a1,a3 are now blocked by a2 a1.setField2( "1" ); // Do ksession.update( fa1, a1 ); a1.setField2( "2" ); // Undo ksession.update( fa1, a1 ); // modify a2, so that a1,a2 are now blocked by a3 a2.setField2( "1" ); // Do ksession.update( fa2, a2 ); a2.setField2( "2" ); // Undo ksession.update( fa2, a2 ); // modify a3 to cycle, so that it goes on the memory end, but in a previous bug still blocked a1 ksession.update( fa3, a3 ); a3.setField2( "1" ); // Do ksession.update( fa3, a3 ); ksession.fireAllRules(); assertEquals( 1, list.size() ); // a2 should still be blocked by a1, but bug from previous update hanging onto blocked ksession.dispose(); }

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More "improvements"?

by Wolfgang Laun

Overnight, a "stale mail bale" (2009) has flopped into my mailbox. I still can't operate pull-down lists on https://issues.jboss.org, but I could - with the very same system - 3 days ago. -W

15 years

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Serialization errors; bug JBRULES-2976 filed

by ljnelson

(I posted this by emailing to the dev list, which I'm a subscriber to, but it doesn't seem to have gone through for some reason (who knows). So I'm posting now via Nabble, which always works.) I've filed Drools bug JBRULES-2976: https://issues.jboss.org/browse/JBRULES-2976 I think this is a valid bug but I'd appreciate another pair of eyes on it. Thanks, Laird -- View this message in context: http://drools.46999.n3.nabble.com/Serialization-errors-bug-JBRULES-2976-f... Sent from the Drools: Developer (committer) mailing list mailing list archive at Nabble.com.

15 years

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duplicate class?

by Wolfgang Laun

Does it make sense to have an exact copy of a class, like this: diff drools-core/src/test/java/org/drools/reteoo/test/parser/DroolsParserException.java drools-compiler/src/main/java/org/drools/compiler/DroolsParserException.java 17c17 < package org.drools.reteoo.test.parser; --- > package org.drools.compiler; All right, they are in different packages and even different (sub-)projects, but still...

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rules-dev May 2011