[rules-dev] Re: rules-dev Digest, Vol 28, Issue 13

I was wondering if anyone knows about any initiative to allow any kind of technology to access rules using drools. I red an article by Mark Proctor, that snows how one can expose the rules via web services. This in turn would allow any application, no matter if it is java or not, to access rules via the web service but some more layers should be added, in order to allow the sender to express what rule base needs to be used, and what facts to be collected from the working memory. I have already a mechanism in place to allow this, but was wondering if maybe there is already something out there that started this kind of initiative. --- On Thu, 4/30/09, rules-dev-request(a)lists.jboss.org <rules-dev-request(a)lists.jboss.org&gt; wrote: From: rules-dev-request(a)lists.jboss.org <rules-dev-request(a)lists.jboss.org&gt; Subject: rules-dev Digest, Vol 28, Issue 13 To: rules-dev(a)lists.jboss.org Date: Thursday, April 30, 2009, 7:09 PM Send rules-dev mailing list submissions to     rules-dev(a)lists.jboss.org To subscribe or unsubscribe via the World Wide Web, visit     https://lists.jboss.org/mailman/listinfo/rules-dev or, via email, send a message with subject or body 'help' to     rules-dev-request(a)lists.jboss.org You can reach the person managing the list at     rules-dev-owner(a)lists.jboss.org When replying, please edit your Subject line so it is more specific than "Re: Contents of rules-dev digest..." Today's Topics:    1. array property evaluation (Cosimo Birtolo)    2. Problem while using RuleFlow Groups in drools (Harsh Jetly)    3. Can drools continue testing even if one of the    conditions       fail ? (DroolUser)    4. Can drools comtinue testing even if one of the    conditions       fail ? (DroolUser)    5. Re: M2 Guvnor Tomcat Deployment Issues and Resolutions (richarda)    6. Rule Dependency Generator (Sangrish)    7. Re: M2 Guvnor Tomcat Deployment Issues and Resolutions (mellster) ---------------------------------------------------------------------- Message: 1 Date: Tue, 8 Jul 2008 09:36:09 +0000 (GMT) From: Cosimo Birtolo <birtlet(a)yahoo.it&gt; Subject: [rules-dev] array property evaluation To: rules-dev(a)lists.jboss.org Message-ID: <630164.90965.qm(a)web26105.mail.ukl.yahoo.com&gt; Content-Type: text/plain; charset="utf-8" Hi all, I'm using drools rule with axis2 and tomcat 6.0.13 and i get this error org.drools.RuntimeDroolsException: Exception executing predicate eval( stereotypeID[1] == "D1" )     at org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:216)     at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)     at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22)     at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145)     at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22)     at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:162)     at org.drools.reteoo.Rete.assertObject(Rete.java:175)     at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)     at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)     at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:911)     at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:883)     at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:684)     at sapi.adapter.ws.AdapterManager.getAdaptedEntity(AdapterManager.java:29)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)     at java.lang.reflect.Method.invoke(Unknown Source)     at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:194)     at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:98)     at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)     at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)     at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)     at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)     at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:120)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)     at java.lang.Thread.run(Unknown Source) Caused by: org.mvel.PropertyAccessException: unable to resolve property: stereotypeID[1]     at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:286)     at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:110)     at org.mvel.ASTNode.getReducedValueAccelerated(ASTNode.java:186)     at org.mvel.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:21)     at org.mvel.MVELRuntime.execute(MVELRuntime.java:90)     at org.mvel.CompiledExpression.getValue(CompiledExpression.java:111)     at org.mvel.MVEL.executeExpression(MVEL.java:235)     at org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.java:45)     at org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:209)     ... 37 more Caused by: java.lang.ArrayIndexOutOfBoundsException: 1     at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getCollectionProperty(ReflectiveAccessorOptimizer.java:459)     at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:264)     ... 45 more import sapi.adapter.ws.EntityAdapter; import sapi.KnowledgeManager.bean.Entity; import sapi.KnowledgeManager.bean.UserContextStereotype; rule "all_1.1"     salience 10     no-loop true     when         $ent : Entity();         $ucs : UserContextStereotype(                magnifier==true &&                stereotypeID[1]=="D1");     then         $ent = EntityAdapter.resize($ent,90);        end I don't understand why when I start this rule under eclipse it work just fine. If I use this application as webService I get this error. Can anyone help me? Thanks       Posta, news, sport, oroscopo: tutto in una sola pagina. Crea l'home page che piace a te! www.yahoo.it/latuapagina -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.jboss.org/pipermail/rules-dev/attachments/20080708/82ef6920/... ------------------------------ Message: 2 Date: Tue, 5 Aug 2008 19:47:42 -0700 (PDT) From: Harsh Jetly <harsh.jetly(a)lntinfotech.com&gt; Subject: [rules-dev] Problem while using RuleFlow Groups in drools To: rules-dev(a)lists.jboss.org Message-ID: <18843391.post(a)talk.nabble.com&gt; Content-Type: text/plain; charset=us-ascii Hi , The version of Drools that I have used is 4.0.4 I have used ruleflow groups to create my rule file. It has a split node (XOR) in which I specify a constraint on which a ruleflow-group is to be selected . Insert arraylists as facts in the working memory one by one. The problem I face is that when I insert these arraylists in the same session , it doesn't evaluate every constraint in the split node . The work around I am using , it that I create a new session for every arraylist , this works just fine . But creating a new session always is an overhead . Can you please assist me with this situation . Thank You Harsh Jetly -- View this message in context: http://www.nabble.com/Problem-while-using-RuleFlow-Groups-in-drools-tp188... Sent from the drools - dev mailing list archive at Nabble.com. ------------------------------ Message: 3 Date: Mon, 11 Aug 2008 04:38:15 -0700 (PDT) From: DroolUser <jyotu.p(a)gmail.com&gt; Subject: [rules-dev] Can drools continue testing even if one of the     conditions fail ? To: rules-dev(a)lists.jboss.org Message-ID: <18923764.post(a)talk.nabble.com&gt; Content-Type: text/plain; charset=us-ascii Hi, I'm using drools for testing if the few attributes of my MO are not null. I construct the rule in the .drl file in following way : rule "name" when         condition1         condition2         condition3         condition4 then         consequence end I have observed that the drool engine verifies the conditions line by line (in the sequence they have written). The moment condition fails, control comes back to the calling method. I don't want this. I want the control to execute each and every condition whether true or false and maintain a record of passed/failed conditions. Something like this  : rule "name" when         condition1                 log the test result  --- This statement should get executed even if condition 1 fails and      control should go to condition 2         condition2                 log the test result         condition3                 log the test result         condition4                 log the test result then         consequence end Is this possible in Drools ? -- View this message in context: http://www.nabble.com/Can-drools-continue-testing-even-if-one-of-the-cond... Sent from the drools - dev mailing list archive at Nabble.com. ------------------------------ Message: 4 Date: Mon, 11 Aug 2008 04:22:49 -0700 (PDT) From: DroolUser <jyotu.p(a)gmail.com&gt; Subject: [rules-dev] Can drools comtinue testing even if one of the     conditions fail ? To: rules-dev(a)lists.jboss.org Message-ID: <18923764.post(a)talk.nabble.com&gt; Content-Type: text/plain; charset=us-ascii Hi, I'm using drools for testing if the few attributes of my MO are not null. I construct the rule in the .drl file in following way : rule "name" when         condition1         condition2         condition3         condition4 then         consequence end I have observed that the drool engine verifies the conditions line by line (in the sequence they have written). The moment condition fails, control comes back to the calling method. I don't want this. I want the control to execute each and every condition whether true or false and maintain a record of passed/failed conditions. Something like this  : rule "name" when         condition1                 log the test result  --- This statement should get executed even if condition 1 fails and      control should go to condition 2         condition2                 log the test result         condition3                 log the test result         condition4                 log the test result then         consequence end Is this possible in Drools ? -- View this message in context: http://www.nabble.com/Can-drools-comtinue-testing-even-if-one-of-the-cond... Sent from the drools - dev mailing list archive at Nabble.com. ------------------------------ Message: 5 Date: Wed, 1 Oct 2008 06:46:07 -0700 (PDT) From: richarda <richard.ambridge(a)gmail.com&gt; Subject: Re: [rules-dev] M2 Guvnor Tomcat Deployment Issues and     Resolutions To: rules-dev(a)lists.jboss.org Message-ID: <19760807.post(a)talk.nabble.com&gt; Content-Type: text/plain; charset=us-ascii David, Thanks for the information..  but I get a different error when deploying to glassfish: WebModule[/drools-guvnor]PWC1275: Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener java.lang.IllegalStateException: Cannot load WEB-INF/classes/net/sf/webdav/WebDavServletBean.class from WebappClassLoader   delegate: true   repositories:     /WEB-INF/classes/ ----------> Parent Classloader: EJBClassLoader : urlSet = [] doneCalled = false Parent -> java.net.URLClassLoader@15b8520 (using getResourceAsStream() returned null)         at org.jboss.seam.deployment.AbstractDeploymentHandler.getClassFile(AbstractDeploymentHandler.java:41)         at org.jboss.seam.deployment.ComponentDeploymentHandler.handle(ComponentDeploymentHandler.java:57)         at org.jboss.seam.deployment.DeploymentStrategy.handle(DeploymentStrategy.java:177)         at org.jboss.seam.deployment.AbstractScanner.handleItem(AbstractScanner.java:30)         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:141)         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137) Any ideas for that one? Thanks -- View this message in context: http://www.nabble.com/M2-Guvnor-Tomcat-Deployment-Issues-and-Resolutions-... Sent from the drools - dev mailing list archive at Nabble.com. ------------------------------ Message: 6 Date: Sun, 5 Oct 2008 00:29:47 -0700 (PDT) From: Sangrish <sidangrish(a)gmail.com&gt; Subject: [rules-dev] Rule Dependency Generator To: rules-dev(a)lists.jboss.org Message-ID: <19821365.post(a)talk.nabble.com&gt; Content-Type: text/plain; charset=us-ascii Hi       I have been using Drools Rules Engine in our application for past couple of weeks. One of the requirements in our project was to let a user (anyone who is writing/analysing the rules) find out what other rules a given rule depends upon. There were a few kinds of dependencies: 1) Object Attribute dependency: The attributes of an object being used in the conditional part of a rule    might be getting modified in the consequence part of another rule. We wanted all such rules with each rule having its own dependency list. 2) Rule Salience based dependency. A rule having lower salience should be executed only after a higher (if any) salience rule has already been executed. 3) Dependency caused by a specific Rule flow. Rules in a ruleflow group should be executed only if (if any) Split condition gets satisfied. 4) Agenda flow dependency (i.e., one agenda following another)    We could not find much support for this in the Drools API. Hence we decided to write our own dependency generator.  The tool we are writing caters to first 3 dependencies. We might even handle the 4th one.    Since Drools is open source, we thought of contributing our bit towards its development. If the drools team wants I can happily work with them on getting this functionality plugged in the Drools system. Thanks Siddharth -- View this message in context: http://www.nabble.com/Rule-Dependency-Generator-tp19821365p19821365.html Sent from the drools - dev mailing list archive at Nabble.com. ------------------------------ Message: 7 Date: Tue, 4 Nov 2008 13:24:48 -0800 (PST) From: mellster <mellster2000(a)yahoo.com&gt; Subject: Re: [rules-dev] M2 Guvnor Tomcat Deployment Issues and     Resolutions To: rules-dev(a)lists.jboss.org Message-ID: <20331483.post(a)talk.nabble.com&gt; Content-Type: text/plain; charset=us-ascii FYI, here are a few more hacks I had to make (after checking out the latest from trunk) to get guvnor started on tomcat6 and j2se1.5 on WinXP 1) java.lang.NoClassDefFoundError: org/drools/ObjectFilter It looks like this one moved to the org.drools.runtime package - duplicated the source file into org/drools and rebuilt. 2) javax.jcr.NamespaceException: http://www.jboss.org/drools-repository/1.0 is not a registered namespace uri Added the line drools=http\://www.jboss.org/drools-repository/1.0 to bin/repository/repository/namespaces/ns_reg 3) jsf not found (if you're not running with J2SE instead of J2EE) Added jsf-api and jsf-impl to the pom (runtime scope should do it) '<dependency>     <groupId>javax.faces</groupId>     <artifactId>jsf-api</artifactId>     <version>1.2_02</version> </dependency> <dependency>     <groupId>javax.faces</groupId>     <artifactId>jsf-impl</artifactId     <version>1.2-b19</version> </dependency> cheers Marco dave sinclair wrote: -- View this message in context: http://www.nabble.com/M2-Guvnor-Tomcat-Deployment-Issues-and-Resolutions-... Sent from the drools - dev mailing list archive at Nabble.com. ------------------------------ _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev End of rules-dev Digest, Vol 28, Issue 13 *****************************************