July 2013 - rules-users - Jboss List Archives

Starting resource change scanner and notifier in drools-server.

by Graham Thomson

Hi, I would like to ask for help with setting up drools-server with Guvnor. I am using version 5.1.1 of both. I am trying to set up an instance of drools-server in Tomcat that periodically loads new updates of packages published in Guvnor (both drools-server and Guvnor run in the same instance of Tomcat). My change set definition is as follows: <?xml version="1.0" encoding="UTF-8"?> <change-set xmlns='http://drools.org/drools-5.0/change-set' xmlns:xs='http://www.w3.org/2001/XMLSchema-instance' xs:schemaLocation='http://drools.org/drools-5.0/change-set http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-api/src/...'> <add> <resource source='http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/<one of my packages>/LATEST' type='PKG' basicAuthentication="enabled" username="<username>" password="" /> <resource source="http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/<another of my packages>/LATEST" type="PKG" basicAuthentication="enabled" username="<username>" password="" /> </add> </change-set> My knowledge-services.xml configuration is as follows (based on the unit test examples highlighted in http://article.gmane.org/gmane.comp.java.drools.user/20992/match=drools+s...): <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:drools="http://drools.org/schema/drools-spring" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://drools.org/schema/drools-spring http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-containe..."> <drools:resource-change-scanner id="s1" interval="5" /> <drools:execution-node id="node1" /> <drools:ksession id="ksession1" type="stateless" kbase="kbase1" node="node1"/> <drools:kbase id="kbase1" node="node1" /> <drools:kagent id="kagent1" kbase="kbase1"> <drools:resources> <drools:resource type="CHANGE_SET" source="classpath:changeset.xml" /> </drools:resources> </drools:kagent> </beans> On loading drools-server, the resources listed in the change set are loaded and available. The problem is that when a new package built and published in Guvnor, drools-server does not detect this and update itself. The effect is the same as if a KnowledgeAgent were used locally and ResourceFactory.getResourceChangeNotifierService().start(); ResourceFactory.getResourceChangeScannerService().start(); were not called. This leads me to the assumption that drools-server does not start these services by default. My question is then can/how do I configure drools-server to start these services such that it will update new changes from Guvnor automatically? Thanks a lot for any help you can offer, Cheers, Graham.

11 years, 10 months

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named query TasksAssignedAsPotentialOwner doesn't work with MySql db

by Frank Knoll

Hi, When I add a task (having two potential owners) by calling the method addTask followed by calling the method getTasksAssignedAsPotentialOwner of org.jbpm.task.service.TaskClient I expect to receive a list of TaskSummaries containing at least the previously added task. But I actually get an empty list! Here is my setup and possible solution: I am using the trunk version of ./jbpm-human-task/src/main/resources/META-INF/orm.xml and a MYSQL database. When calling addTask the Task table will be populated with a NULL actualOwner_id. The named query TasksAssignedAsPotentialOwner "select new org.jbpm.task.query.TaskSummary(...t.taskData.actualOwner...) from ... left join t.taskData.actualOwner ..." of orm.xml generates SQL consisting of an inner join "inner join OrganizationalEntity user7_ on task0_.actualOwner_id=user7_.id" which doesn't take the NULL actualOwner_id correctly into account. When I replace the named query TasksAssignedAsPotentialOwner with "select new org.jbpm.task.query.TaskSummary(...actualOwner...) from ...left join t.taskData.actualOwner as actualOwner ...", then the generated SQL consists of an "left outer join OrganizationalEntity user2_ on task0_.actualOwner_id=user2_.id" which takes the NULL actualOwner_id correctly into account. So I get a List of TaskSummaries containing the added task. Is this a correct fix? Cheers, Frank -- View this message in context: http://drools.46999.n3.nabble.com/named-query-TasksAssignedAsPotentialOwn... Sent from the Drools: User forum mailing list archive at Nabble.com.

11 years, 11 months

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I give up, where is drools:execution-node defined??

by dunnlow

I see <drools:execution-node id="node1"/> in the drools server knowledge-services.xml and throughout the documentation. But, my app can't compile because that is undefined. I looked in drools-spring.xsd and spring-beans.xsd (the two namespaces defined in that file), but no joy. Am I just blind?? Anyone know where it is defined? Thanks -J -- View this message in context: http://drools.46999.n3.nabble.com/I-give-up-where-is-drools-execution-nod... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years

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Does drools generate document from drl files?

by Zhao Yi

I want to add some comments on drl files and get a document from that. I know that guvnor can do this for me but it simply copy all the drl file content into a pdf file. What I want is that we can write some comments in a specified format provided by drools and generate a document like, html. Can I do this in drools or not? -- View this message in context: http://drools.46999.n3.nabble.com/Does-drools-generate-document-from-drl-... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years

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Error Inserting events into drools fusion stream

by Ayush

Hi All, I'm trying to implement drools fusion into my app. The scenario of my app is as follows: - Facts will be received continuosly. - On receving fact I'm generating a new event and adding it into a new working memory entry point stream. Also I'm adding facts into session coz I'll be updating them. - I need to apply rules on continuous stream of events. - I've not used any camel + spring or pipeline. Are these mandatory to use? For 1st fact everything works fine but when I receive 2nd fact I'm getting Now when I'm trying to get entry point on receive of 2nd alarm I'm getting org.drools.RuntimeDroolsException: Unexpected exception executing action org.drools.reteoo.PropagationQueuingNode$PropagateAction@9ff411 Caused by: java.util.concurrent.RejectedExecutionException. On debug I found that the above exception is coming when I'm calling session.getWorkingMemoryEntryPoint("MyStream"); Can anyone please help me that how should I insert facts and events into working memory? I'd invested ample amount of time searching for this but I'm empty handed. Guys please help this is very urgent for me. Thanks in anticipation -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Error-Inserting-event... Sent from the Drools - User mailing list archive at Nabble.com.

12 years

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Upgrade from drools 5.4 to 6.0.0-Beta3 - Legacy API Adapter JAR

by MaverickDrools

Hi, There is not enough documentation on drools v6.0.0-Beta3, but this is what I'm trying to do. Our system was designed with 5.3 but then we encountered the issue with synchronization (https://issues.jboss.org/browse/JBRULES-3283), so we upgraded to v 5.4. Things worked fine until we multithreaded the client code due to which we faced another issue (https://issues.jboss.org/browse/JBRULES-3675) So finally now, I'm trying to upgrade to 6.0.0-Beta3 since both those issues should've been fixed with 6.0.0-Alpha1. The problem I'm facing is, I do not have enough documentation to look at to see how to convert those things. I went through the slides etc that were posted on the mailing list for the conferences, but I'm still unable to figure it out correctly.. So, can someone point me to a JUnit or something that I can look at to figure this thing out? static { KieServices ks = KieServices.Factory.get(); KieRepository kr = ks.getRepository(); Resource res = ks.getResources().newFileSystemResource( "src/main/resources/rules/abc.drl"); KieModule kModule = kr.addKieModule(res); kc = ks.newKieContainer(kModule.getReleaseId()); } throws an exception on kr.addKieModule(res) which says Error in opening zip file.. I assume we are now expecting a jar instead of a plain drl file. Is there a way to convert this drl into a jar that the 6.0 code can understand (for compatibility purposes with the existing system)? Another thought was to make use of the Legacy API Adapter JAR, but I couldn't find any examples of the same. Can you point me to a code sample/JUnit that could explain how this works? Thanks -- View this message in context: http://drools.46999.n3.nabble.com/Upgrade-from-drools-5-4-to-6-0-0-Beta3-... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years

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Guvnor enumerations

by Stephen Masters

Hi folks, I don't suppose anything notable changed between 5.3 and 5.5 in the way Guvnor loads data enumerations? I have a number of enumerations similar to the following: 'MyFact.currencies' : (new com.myapp.guvnor.enums.CurrencyEnum()).isoCodes() But I see the exception in Guvnor: Unable to load enumeration data. [Error: unable to invoke method: isoCodes] [Near :{... 'MyFact.': ….}] ^ [Line: 1, Column: 1] Error type: org.mvel2.PropertyAccessException The jar is in the lib directory, there is a method called "isoCodes()", and when I run the main class inside it then the various enumerations are returned. And yes, it did (does) work absolutely fine in 5.3 with this same configuration. Steve

12 years, 1 month

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Planner with a list of planning variables

by Justin Case

Hello all, can I use as planning variable a list of values? Here's a test use case: planning a food recipe, where the recipe can have say maximally 5 ingredients (taken from the solution property, I guess). So far I could find in the examples and documentation, it's all about ONE planning variable in the solution, but here I'd need a LIST of such... is it actually doable this way? I cannot do it the other way around, as an ingredient may be found in more recipes... Many thanks, JC

12 years, 1 month

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Where is org.drools.server package for camel server?

by dunnlow

I downloaded and deployed the Drools 5.4 drools integration server ("drools-camel-server-5.4.0.Final.war") trying to run the test. However, there is a class referenced in test.jsp "org.drools.server.CamelServerApp" which I cannot find (actually, I found the source code for CR1 for that class in grepcode http://grepcode.com/file/repo1.maven.org/maven2/org.drools/drools-camel-s...) . Also, I can not even find the package org.drools.server. Can someone tell me anything about this class/package? Where is it and is it just for the test? Thanks, -J -- View this message in context: http://drools.46999.n3.nabble.com/Where-is-org-drools-server-package-for-... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years, 2 months

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Optaplanner: Unexpected global [scoreHolder]

by jonathan.labin

I am using Optaplanner 6.0.0-Beta2 and I am in some cases receiving the following error during initial solution construction: Exception in thread "main" java.lang.RuntimeException: Unexpected global [scoreHolder] at org.drools.core.common.AbstractWorkingMemory.setGlobal(AbstractWorkingMemory.java:515) at org.drools.core.impl.StatefulKnowledgeSessionImpl.setGlobal(StatefulKnowledgeSessionImpl.java:360) at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.resetKieSession(DroolsScoreDirector.java:83) at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.setWorkingSolution(DroolsScoreDirector.java:74) at org.optaplanner.core.impl.solver.scope.DefaultSolverScope.setWorkingSolutionFromBestSolution(DefaultSolverScope.java:176) at org.optaplanner.core.impl.solver.DefaultSolver.solvingStarted(DefaultSolver.java:176) at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:154) I noticed this error in gist: https://gist.github.com/ge0ffrey/5236604 If this is the same error, what are the current constraints that I need adhere to in order to avoid this error? Jon -- View this message in context: http://drools.46999.n3.nabble.com/Optaplanner-Unexpected-global-scoreHold... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years, 3 months

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rules-users July 2013