[rules-users] Rule for Collection (Ashish Soni)

Send rules-users mailing list submissions to rules-users(a)lists.jboss.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.jboss.org/mailman/listinfo/rules-users or, via email, send a message with subject or body 'help' to rules-users-request(a)lists.jboss.org You can reach the person managing the list at rules-users-owner(a)lists.jboss.org When replying, please edit your Subject line so it is more specific than "Re: Contents of rules-users digest..." Today's Topics: 1. Rule for Collection (Ashish Soni) 2. Using KnowledgeAgent with Stateful session (nestabur) 3. Re: Cannot view Process Definitions in gwt-console (rbms) 4. Re: Using KnowledgeAgent with Stateful session (James Owen) ---------------------------------------------------------------------- Message: 1 Date: Wed, 26 Aug 2009 12:22:55 -0400 From: Ashish Soni <learnspring(a)gmail.com&gt; Subject: [rules-users] Rule for Collection To: Rules Users List <rules-users(a)lists.jboss.org&gt; Message-ID: <cf7a8a020908260922je3d0f9cie85eada146f594e9(a)mail.gmail.com&gt; Content-Type: text/plain; charset="iso-8859-1" Hi All , Can someone please help how can i write a rule for below condition - I have Student object which contains List of Courses public Class Person { private List<Course> courseList; } public Class Course { private String name; private int duration; } Now lets say the list of course inside person object contains 10 course objects and if one of the course object contain name =="XYZ" and another contain a duration = 20 hours then how i can write a rule for this. Thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.jboss.org/pipermail/rules-users/attachments/20090826/f74f64c... ------------------------------ Message: 2 Date: Wed, 26 Aug 2009 09:34:33 -0700 (PDT) From: nestabur <nestabur(a)gmail.com&gt; Subject: [rules-users] Using KnowledgeAgent with Stateful session To: rules-users(a)lists.jboss.org Message-ID: <25151447.post(a)talk.nabble.com&gt; Content-Type: text/plain; charset=us-ascii Does anyone tried to use the knowledgeAgent with statefulSessions? I've tried to configure my rule engine obtaining unexpected behaviour. I configure my statefulSession as follows: wm = (ReteooStatefulSession) ((KnowledgeBaseImpl) kagent .getKnowledgeBase()).ruleBase.newStatefulSession( (SessionConfiguration) sessionConf, env); ksession = new StatefulKnowledgeSessionImpl(wm, kagent.getKnowledgeBase()); And after updating the KnowledgeBase in the agent I update my ksession: wm.setRuleBase((InternalRuleBase) ((KnowledgeBaseImpl) kagent .getKnowledgeBase()).ruleBase); ksession = new StatefulKnowledgeSessionImpl(wm, kagent.getKnowledgeBase()); Without using entry-points this approach works as expected, but using them it fails after the first update throwing the error: Exception while processing message: java.lang.NullPointerException java.lang.NullPointerException at org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:54) at org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:79) at org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:66) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:109) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:80) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:28) Browsing the drools core code I found the line that was throwing the exception and tried to get the same result by implementing: if (!((InternalRuleBase) ((KnowledgeBaseImpl) ksession.getKnowledgeBase()).ruleBase) .getTypeDeclaration(fact.getClass()) == null) log.info (((InternalRuleBase) ((KnowledgeBaseImpl) ksession.getKnowledgeBase()).ruleBase) .getTypeDeclaration(fact.getClass()).getTimestampExtractor().toString()); after updating my ksession. The result was the same, again the same exception thrown but my logger wrote: 18:01:50,232 INFO [ClassFieldExtractor class=MyPackage.MyFact field=myTimestampField] So I dont know why the core is throwing that exception, is that implementation correct?, any ideas? Thanks, Nestor -- View this message in context: http://www.nabble.com/Using-KnowledgeAgent-with-Stateful-session-tp251514... Sent from the drools - user mailing list archive at Nabble.com. ------------------------------ Message: 3 Date: Wed, 26 Aug 2009 11:37:55 -0700 (PDT) From: rbms <rbms(a)hotmail.com&gt; Subject: Re: [rules-users] Cannot view Process Definitions in gwt-console To: rules-users(a)lists.jboss.org Message-ID: <25152800.post(a)talk.nabble.com&gt; Content-Type: text/plain; charset=us-ascii Thanks for the reply Kris, I finally found the issue. When file is uploaded from guvnor, looks like the compile package bytes property is not set in the repo. So I had to invoke rebuildPackages function from org.drools.guvnor.server.ServiceImplementation.loadRuleAsset function thanks -Ramesh Kris Verlaenen wrote: > > Because the gwt-console does not allow you to specify which knowledge > package should be loaded (yet), it currently uses the "default" package. > Putting your rule flow in a package called "default" (and then building > that package in Guvnor) should solve your issue I think. You could also > change the name of the package to load in the changeset.xml file in > drools-gwt-console. > > Kris > > Quoting rbms <rbms(a)hotmail.com&gt;: > >> >> I am trying to deploy drools-guvnor, gwt-console in Tomcat. >> I am using mysql for persistence. >> I uploaded the process definitions in drools-guvnor.(I can see them >> Packages >> --> defaultPackage --> RuleFlows) >> However when I try to view them in Processes --> Process Definitions >> --> >> Definition List, I cannot see them. >> >> Following is from tomcat server log.(with debugging statements that >> I >> added.) >> >> I placed debug statements in >> org.drools.guvnor.server.files.PackageDeploymentServlet.doGet method. >> This >> method calls >> org.drools.guvnor.server.files.FileManagerUtils.loadBinaryPackage >> method. >> >> //Following is the debug statement that I placed in >> org.drools.guvnor.server.files.FileManagerUtils.loadBinaryPackage >> method. >> public String loadBinaryPackage(String packageName, >> String packageVersion, >> boolean isLatest, >> OutputStream out) throws >> IOException { >> PackageItem item = null; >> if ( isLatest ) { >> item = repository.loadPackage( packageName ); >> System.out.println("FileManagerUtils.loadBinaryPackage() ..."); >> AssetItemIterator ai = item.queryAssets("drools:format='rf'", >> false); >> for (;ai.hasNext();) { >> Object o = ai.next(); >> System.out.println("FileManagerUtils.loadBinaryPackage item = " >> + >> o.getClass() +":"+o); >> >> > System.out.println("*************************************************************************"); >> } >> >> As you can see the servlet returns the rule flow. >> >> I also placed some debug statements in >> org.drools.rule.Package.readExternal >> method. As you can see when it comes to this method rule flow is >> empty. >> >> Because of this >> org.drools.integration.console.DroolsFlowCommandDelegate.getProcesses() >> function returns 0 process definitions. >> >> Can somebody help? >> >> ******************************************************** >> [2009:08:231 22:08:625:debug] KnowledgeAgent rebuilding KnowledgeBase >> using >> ChangeSet >> [2009:08:231 22:08:625:debug] KnowledgeAgent building >> resource=[UrlResource >> > path=' http://localhost:8081/drools-guvnor/org.drools.guvnor.Guvnor/package/defa... '] >> PackageName: defaultPackage >> //org.drools.guvnor.server.files.PackageDeploymentServlet.doGet - >> Begin >> PackageVersion: LATEST >> PackageIsLatest: true >> PackageIsSource: false >> requestURI: >> /drools-guvnor/org.drools.guvnor.Guvnor/package/defaultPackage/LATEST >> test: >> /drools-guvnor/org.drools.guvnor.Guvnor/package/defaultPackage/LATEST >> //org.drools.guvnor.server.files.PackageDeploymentServlet.doGet - >> End >> FileManagerUtils.loadBinaryPackage() ... // >> org.drools.guvnor.server.files.FileManagerUtils.loadBinaryPackage - >> Begin >> FileManagerUtils.loadBinaryPackage item = class >> org.drools.repository.AssetItem:Content of rule item named 'testRF': >> Content: <?xml version="1.0" encoding="UTF-8"?> >> <process xmlns="http://drools.org/drools-5.0/process" >> xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" >> xs:schemaLocation="http://drools.org/drools-5.0/process >> drools-processes-5.0.xsd" >> type="RuleFlow" name="ProjectApprovalProcess" >> id="ProjectApprovalProcess" package-name="defaultPackage" > >> >> <header> >> <variables> >> <variable name="project" > >> <type >> name="org.drools.process.core.datatype.impl.type.ObjectDataType" >> className="com.yesVin.workflow.project.Project" /> >> </variable> >> <variable name="status" > >> <type >> name="org.drools.process.core.datatype.impl.type.StringDataType" /> >> </variable> >> </variables> >> </header> >> >> <nodes> >> <start id="1" name="Start" x="15" y="11" width="80" height="40" >> /> >> <end id="2" name="End" x="206" y="442" width="80" height="40" /> >> <humanTask id="3" name="Review Project" x="126" y="12" >> width="80" >> height="40" > >> .. >> ... >> ..... >> ...... >> //org.drools.guvnor.server.files.FileManagerUtils.loadBinaryPackage >> - >> End >> Package.readExternal isDroolsStream = true // >> org.drools.rule.Package.readExternal - Begin >> Package.readExternal pkg = null >> dialectRuntimeRegistry = >> org.drools.rule.DialectRuntimeRegistry@198046 >> name = defaultPackage >> imports = >> {defaultPackage.*=org.drools.rule.ImportDeclaration@d75e0360} >> staticImports = [] >> functions = {} >> factTemplates = {} >> ruleFlows = {} >> globals = {} >> valid = true >> rules = {} >> classFieldAccessorStore = >> org.drools.base.ClassFieldAccessorStore@34b350 >> //org.drools.rule.Package.readExternal - End >> -- >> View this message in context: >> > http://www.nabble.com/Cannot-view-Process-Definitions-in-gwt-console-tp25... >> Sent from the drools - user mailing list archive at Nabble.com. >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > > > > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- View this message in context: http://www.nabble.com/Cannot-view-Process-Definitions-in-gwt-console-tp25... Sent from the drools - user mailing list archive at Nabble.com. ------------------------------ Message: 4 Date: Wed, 26 Aug 2009 16:31:04 -0500 From: James Owen <jco2009(a)att.net&gt; Subject: Re: [rules-users] Using KnowledgeAgent with Stateful session To: Rules Users List <rules-users(a)lists.jboss.org&gt; Message-ID: <7DCB55B5-8A89-481A-BCDC-77E4A2C5F0B6(a)att.net&gt; Content-Type: text/plain; charset="us-ascii" Greetings: Nobody seems to be replying and I'm not really "qualified" to reply but I might be able to point you in the right direction. Long, long ago in a land far, far away we did a really cool project using Intelligent Agents and employed most of the technology from FIPA, The Foundation for Intelligent Physical Agents; see http://www.fipa.org/ for more information. SDG James Owen Founder October Rules Fest Senior Consultant / Architect KBSC http://www.kbsc.com http://www.OctoberRulesFest.org Twitter: OctRulesFest Blogs: http://JavaRules.blogspot.com [Rulebased Systems Blog] http://ORF2009.blogspot.com [October Rules Fest Blog] http://exscg.blogspot.com/ [Expert Systems Consulting Group Blog] "If I have seen a little further it is by standing on the shoulders of giants." Sir Isaac Newton in a letter to Robert Hooke, 5 Feb 1676 Come to October Rules Fest and stand on the shoulders of the Giants of the industry; if only for a week. On Aug 26, 2009, at 11:34 AM, nestabur wrote: > > > Does anyone tried to use the knowledgeAgent with statefulSessions? > > I've tried to configure my rule engine obtaining unexpected behaviour. > > I configure my statefulSession as follows: > > wm = (ReteooStatefulSession) ((KnowledgeBaseImpl) kagent > .getKnowledgeBase()).ruleBase.newStatefulSession( > (SessionConfiguration) sessionConf, env); > ksession = new StatefulKnowledgeSessionImpl(wm, > kagent.getKnowledgeBase()); > > And after updating the KnowledgeBase in the agent I update my > ksession: > > wm.setRuleBase((InternalRuleBase) ((KnowledgeBaseImpl) kagent > .getKnowledgeBase()).ruleBase); > ksession = new StatefulKnowledgeSessionImpl(wm, > kagent.getKnowledgeBase()); > > Without using entry-points this approach works as expected, but > using them > it fails after the first update throwing the error: > > Exception while processing message: java.lang.NullPointerException > java.lang.NullPointerException > at > org > .drools > .reteoo > .ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java: > 54) > at > org > .drools > .common > .AbstractFactHandleFactory > .newFactHandle(AbstractFactHandleFactory.java:79) > at > org > .drools > .common > .AbstractFactHandleFactory > .newFactHandle(AbstractFactHandleFactory.java:66) > at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:109) > at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:80) > at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:28) > > Browsing the drools core code I found the line that was throwing the > exception and tried to get the same result by implementing: > > if (!((InternalRuleBase) ((KnowledgeBaseImpl) > ksession.getKnowledgeBase()).ruleBase) > .getTypeDeclaration(fact.getClass()) == null) > log.info (((InternalRuleBase) ((KnowledgeBaseImpl) > ksession.getKnowledgeBase()).ruleBase) > > .getTypeDeclaration > (fact.getClass()).getTimestampExtractor().toString()); > > after updating my ksession. The result was the same, again the same > exception thrown but my logger wrote: > 18:01:50,232 INFO [ClassFieldExtractor class=MyPackage.MyFact > field=myTimestampField] > > So I dont know why the core is throwing that exception, is that > implementation correct?, any ideas? > > > Thanks, > > Nestor > > -- > View this message in context: http://www.nabble.com/Using-KnowledgeAgent-with-Stateful-session-tp251514... > Sent from the drools - user mailing list archive at Nabble.com. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users -------------- next part -------------- An HTML attachment was scrubbed... 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