January 2014 - rules-users - Jboss List Archives

by MaverickDrools

Is there a way to effective date a rule through a program? Requirement: without using the Guvnor UI to write the rules, trying to upload a .drl file using REST APIs which already has rules specified "without" the date-effective/date-expire attributes. Is there a way to maintain versions that could be used by effective dating the entire package itself? Or in general, how do we effective date the rules in Guvnor without using date-effective attributes for rules and create a knowledgebase from the package based on the current date? Thanks -- View this message in context: http://drools.46999.n3.nabble.com/Effective-Dating-of-Rules-tp4022422.html Sent from the Drools: User forum mailing list archive at Nabble.com.

7 hours, 38 minutes

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drools-solver results question

by Andrew Waterman

Hello, I'm starting to work with the drools-solver to help on a gaming project. Basically, we have a game that works in two modes: 1) a competitive game where humans (or agents) compete with one another on a well defined game board to achieve 24 points by using three (or four) agricultural development tokens. 2. A puzzle, where all 4 players work cooperatively to create an equitable solution, where all 4 players win with at least 24 points by means of our agricultural development tokens. I am starting to work with drools-solver to address the puzzle part of our game. Basically, we are interested in having the solver do two things for us: a) find the optimal solution for our game/puzzle, based upon our requirements [this part seems quite straightforward] and b) getting the total number of solutions that satisfy our constraints. We would like, as well, to be able to inspect these other, sub-optimal, solutions, in order to explore our game and puzzle further. From my reading of the "Solver" API , it looks like we will only be able to get the optimal solution. Does anyone have any suggestions for a workaround in this case? Or is there some functionality in the solver that I am missing? I look forward to your feedback. best wishes, Andrew --------------------------------- Andrew Waterman San Cristóbal de las Casas, Chiapas, Mexico

2 weeks, 5 days

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Build a Graphical Adventure Game in 20 minutes using JBoss Drools : All Hale the Wumpus

by Mark Proctor

http://www.dzone.com/links/build_a_graphical_adventure_game_in_20_minutes... Today we take you on a 20 minute adventure. Building, almost from scratch, a complete graphical adventure game with Drools. The code will be part of the up coming Drools 5.4 release. The game is based on Wumpus World, from the book Artificial Intelligence: a Modern Approach. All Hale the Wumpus Please vote up on the dzone

4 weeks

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Need help with setFocus

by new2drools

Hi All, Need some help with understanding setFocus. I have the following use case: if (condition1) { if (condition2) { } else if (condition3) { } else if (condition 4) { } } if (condition5) { if (condition2) { } else if (condition3) { } else if (condition 4) { } } I created 3 rules (rule2, rule3, rule4) for checking condition2, condition3, condition4 and created 1 agenda group (groupX) for them. I created 2 rules (rule1, rule5) for checking condition1, condition5 and created 1 agenda group(groupY) for them. rule "rule1" agenda-group "groupY" when // then drools.setFocus("groupX"); end rule "rule3" agenda-group "groupX" activation-group "someActiveGroup" when // then // end >From the java code: ksession.getAgenda().getAgendaGroup("groupY").setFocus(); Problem: The first time, drools.setFocus("groupX") is invoked, I see that it's working fine. rule2 or rule3 or rule4 get triggered. But, the SECOND time that drools.setFocus("groupX") is invoked, I don't see that any rule in agenda-group groupX is being invoked...even though one of the rule's LHS explicitly matches...thinking that the activation-group is cancelling all the activation's (after one rule in that activation group is fired), I even removed the activation-group statement. But, it didn't help...ideally, I would like to bunch rule2, rule3, rule4 in one activation group. Can you please let me know as to why the second invocation of setFocus is not working? I even tried to remove everything in LHS of rule2/3/4, to see if the second invocation would work...it doesn't... Thanks!! -- View this message in context: http://www.nabble.com/Need-help-with-setFocus-tp24177742p24177742.html Sent from the drools - user mailing list archive at Nabble.com.

1 month, 1 week

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Drools beginner - unable to resolve method using strict-mode

by Stefan Schuster

Hi, I'm new to drools, and I made my first steps using the very nice video-tutorial "Build Pong in 13 minutes using JBoss Drools" found here: http://www.youtube.com/watch?v=Omj4PR3v-nI Eclipse shows building errors, but Pong start anyway. What does this error mean? in move.drl there is following rule: *<rule "Move Bat Up" timer(expr: bat.speed, bat.speed) no-loop when* * ui : PongUI( ready == true )* * ( KeyPressed( keyText == "A" ) and bat : Bat( playerId == PlayerId.PlayerOne, y > pconf.padding + pconf.sideLineWidth )* * or* * KeyPressed( keyText == "K" ) and bat : Bat( playerId == PlayerId.PlayerTwo, y > pconf.padding + pconf.sideLineWidth ) ) * * td : TableDirty( ) * *then * * tableG = ui.getTablePanel().getTableG();* * tableG.setColor( Color.BLACK ); // background* * tableG.fillRect( bat.x, bat.y, bat.width, bat.height );* * * * modify( bat ) { y = bat.y - 2 };* * tableG.setColor( Color.WHITE ); // background* * tableG.fillRect( bat.x, bat.y, bat.width, bat.height ); * * modify( td ) { dirty = true };* *end* the error message is: [Error: unable to resolve method using strict-mode: org.drools.spi.KnowledgeHelper.td<http://org.drools.spi.knowledgehelper.td/> ()] [Near : {... @Modify with( td ) { dirty = true }; ....}] in another File (ui.drl) TableDirty is defined: *declare TableDirty* * @propertyReactive* * dirty : boolean* *end* Any ideas what this error message means? And why can I start pong despite this error? Thanks a lot for helping me Stefan

5 months

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conways game of life

by Mark Proctor

For anyone looking for a good and complex example on how to write rules properly, please look at Conways Game of Life in drools-examples, for extra bonus points compare it to the old version in M1. You'll see nearly all the logic is moved from java to the drl and we have removed the need for nested objects by using objects relaitionally, which also allows us to exploit cross products to drive the application. Mark

5 months

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Ruleflow not working with stateless session in drools-server 5.5.0.Final

by tslonaker

I am running drools-server 5.5.0.Final and I am having a problem with stateless sessions and ruleflows. Only the first step in the ruleflow executes. There is a catch to my problem though. I have drools-server hosted in JBoss 7.1. If I restart the service by disabling and then enabling via the admin console then the ruleflow works correctly (all nodes hit) one time. So, it always works just after the service starts. Each time after the first rule execution it stops at the first ruleflow node. I am sending commands to the service in JSON format through the REST interface. If I send the same commands in the same order through Java / eclipse then the ruleflow works correctly every time. My problem sounds very similar to the problem described in the thread below: http://drools.46999.n3.nabble.com/RuleFlow-only-calling-first-RuleFlowGro... <http://drools.46999.n3.nabble.com/RuleFlow-only-calling-first-RuleFlowGro...> It looks like this problem was addressed in version 5.3.0 ( https://issues.jboss.org/browse/JBRULES-2718 <https://issues.jboss.org/browse/JBRULES-2718> ). -- View this message in context: http://drools.46999.n3.nabble.com/Ruleflow-not-working-with-stateless-ses... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 5 months

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Usage of the jcr2vfs migration tool

by dstern

Are there instructions anywhere for using the jcr2vfs migration tool? I pruned my JCR repository (created under Guvnor 5.6.0.Final) until the migration tool ran without error (which meant archiving all my brl format assets among other things) but I'm not sure what to do with the output. I copied the contents of outputVfs to my existing .niogit folder (leaving the .niogit generated by the migration tool alone) but the migrated repository doesn't show up. Is this because I didn't replace my existing .niogit with the one generated by the tool? -- View this message in context: http://drools.46999.n3.nabble.com/Usage-of-the-jcr2vfs-migration-tool-tp4... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 6 months

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Drools 6.0.1: Pushing changes back to Workbench GIT using SSH

by dotrc

I am using workbench for managing my rules maven projects within the embedded GIT repository. I am aware that using git:// protocol, I can clone an existing rule repository; I can do this successfully. For authoring rules, I want to use Eclipse (using EGit). I want to push my commits back to the GIT repo. I understand that I'll have to use ssh protocol instead of git for specifying the repo, something like this: ssh://{userName}@localhost:8001/{repoName} When we use a standard GIT repo like stash, it gives us an option to set our public key on the stash server, but I'm not able to find a way to do that with the embedded ssh server within workbench. Hence, I'm not able to authenticate myself and perform a push. We tried creating a private-public key pair using ssh-keygen and put that within c:\users\<username>\.ssh and added the public key to 'authorized_keys(2) (though I know this may not be the right place) and then used the private key as the identity file with ssh client directly from cygwin, again to no avail. Any pointers will be really appreciated. Also, should the username be 'admin' or any other specific one for pushing? Will the existing Windows username work? Thanks, Rishi -- View this message in context: http://drools.46999.n3.nabble.com/Drools-6-0-1-Pushing-changes-back-to-Wo... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 6 months

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How to read XML using XMLPackageReader-Drools-compiler.5.2.1.final?

by Praveen

Hi, I am using Drools-compiler.5.2.1.final. I am trying to convert an drl to xml and vice versa using DrlParser, DrlDumper, XMLPackageReader and XML Dumper. Drl to XML conversion works fine but XML to Drl throws NPE. I have placed the XML file under a folder called sample. NPE is thrown at line 5.. Also attached is the exception. Please suggest. TIA. Reader source = new InputStreamReader( DroolsConversionHelper.class.getResourceAsStream(xmlFileName)); PackageBuilderConfiguration conf = new PackageBuilderConfiguration(); XmlPackageReader reader = new XmlPackageReader(conf.getSemanticModules()); DrlDumper dumper = new DrlDumper(); //line 5 reader.read(source); PackageDescr descr = reader.getPackageDescr(); String test = dumper.dump(descr); System.out.println(test); java.lang.NullPointerException at org.drools.xml.ExtensibleXmlParser.resolveSchema(ExtensibleXmlParser.java:696) at org.drools.xml.ExtensibleXmlParser.resolveEntity(ExtensibleXmlParser.java:622) at com.sun.org.apache.xerces.internal.util.EntityResolverWrapper.resolveEntity(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.resolveEntity(Unknown Source) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.resolveDocument(Unknown Source) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.findSchemaGrammar(Unknown Source) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(Unknown Source) Regards, Praveen. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-read-XML-using-XMLPackageReader-... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 7 months

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rules-users January 2014