October 2009 - rules-dev - Jboss List Archives

by Mark Proctor

Richard L. Burton III wrote: > Hi Mark, > > What's the best way to send over the changes I made for the POMs? I > won't be able to send them over this week, since I'm not near the > computer which has the pom files. > > I should be able to send them over by Friday. Just create a jira and attach it, diff or zip or both is fine. How did the work go on the OSGi services, classloaders etc? Mark > > Cheers, > > > On Mon, Oct 26, 2009 at 7:14 PM, Mark Proctor <mproctor(a)codehaus.org > <mailto:mproctor@codehaus.org>> wrote: > > Richard Burton (in cc) was looking into this, I believe he was > getting a basic automated maven build going, and making our api > more OSGi friendly. I'm not sure on his status. > > Mark > Michael Neale wrote: >> I see no reason why not - the only effect would be in the manifest of >> the released jars right? >> >> Are you volunteering to look into how to get maven to do this? ;) >> >> On Tue, Oct 27, 2009 at 12:00 AM, Maciej Prochniak <mpr(a)touk.pl> <mailto:mpr@touk.pl> wrote: >> >>> Hello, >>> >>> is OSGI packaging of Jboss rules artifacts planned? >>> Currently drools bundles are provided by various 3rd parties e.g. >>> servicemix, springsource >>> but it would be nice to have 'official' bundles of latest versions with >>> e.g. correct optional import >>> >>> It shouldn't be hard to do, as maven is used in building process - just >>> a matter of maven-bundle-plugin configuration. >>> >>> br, >>> maciek >>> >>> _______________________________________________ >>> rules-dev mailing list >>> rules-dev(a)lists.jboss.org <mailto:rules-dev@lists.jboss.org> >>> https://lists.jboss.org/mailman/listinfo/rules-dev >>> >>> >> > > > > > -- > -Richard L. Burton III

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osgi packaging

by Maciej Prochniak

Hello, is OSGI packaging of Jboss rules artifacts planned? Currently drools bundles are provided by various 3rd parties e.g. servicemix, springsource but it would be nice to have 'official' bundles of latest versions with e.g. correct optional import It shouldn't be hard to do, as maven is used in building process - just a matter of maven-bundle-plugin configuration. br, maciek

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Spring integration for Drools has landed.

by Mark Proctor

http://blog.athico.com/2009/10/spring-integration-for-drools-has.html Spring integration for Drools has landed. <http://blog.athico.com/2009/10/spring-integration-for-drools-has.html> Posted by Mark Proctor I've just committed the first end to end working Spring integration for Drools. There is still lots more to do, but it at least now allows for end to end working examples. The latest build that includes this work can be found from hudson here: https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/t... So how does it work. Lets look at the unit test for more details. The beans.xml <http://fisheye.jboss.org/browse/JBossRules/trunk/drools-container/drools-...> provides a configuration for KnowledgeBases, StatefulKnowledgeSession, StatelessKnowledgeSession and the ServiceManager. KnowledgeBases can be confired from a list of resources, that work in the same way that changeset xml does. This allows resources to be pulled from any URL resolveble location, be it classpath, localdisk or from artifacts published from Guvnor: <drools:kbase id="kbase1"> <drools:resource source="classpath:org/drools/container/spring/testSpring.drl" type="DRL"/> <drools:resource source="classpath:org/drools/container/spring/IntegrationExampleTest.xls" type="DTABLE"> <drools:decisiontable-conf input-type="XLS" worksheet-name="Tables_2"/> </drools:resource> </drools:kbase> The above xml shows a KnowledgeBase configured from a DRL and a XLS, remember we could have added DRFs if we wanted workflow in there too. That KnowledgeBase is now a bean that can be referenced via the id "kbase1". From that bean we can now create sessions. The "type" attribute specifies whether the session is stateful or stateless: <drools:ksession id="ksession1" type="stateless" kbase="kbase1"/> <drools:ksession id="ksession2" type="stateful" kbase="kbase1"/> Those sessions are now beans and can be injected into your own classes using Spring annotations, or used to configure up a Drools ServiceManager. <drools:serviceManager id="sm1"> <drools:register name="stateless1" ref="ksession1"/> <drools:register ref="ksession2"/> </drools:serviceManager> The ServiceManager is a new class that I haven't mentioned before that will be in the upcoming Drools 5.1. The ServiceManager can be worked with both locally and remotely. It allows sessions to be created and registered all seamlessly, whether it's local or remote and those sessions are also exposed both locally and remotely. This ties in with the Camel <http://camel.apache.org/>work we are doing to make it easy to work with Drools out of the box in a service and remoting environment and should hopefully provide the ultimate in event driven architectures. I'll blog more on those pieces as they fall into place. The XSD can be found here: spring-drools.xsd <http://fisheye.jboss.org/browse/JBossRules/trunk/drools-container/drools-...> Once the xml is in place, using it with Spring is a doddle and you can look at the two unit tests <http://fisheye.jboss.org/browse/JBossRules/trunk/drools-container/drools-...> to see this in action: public void test1() throws Exception { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( "org/drools/container/spring/beans.xml" ); List list = new ArrayList(); StatelessKnowledgeSession kstateless = (StatelessKnowledgeSession) context.getBean( "ksession1" ); kstateless.setGlobal( "list", list ); kstateless.execute( new Person( "Darth", "Cheddar", 50 ) ); assertEquals( 2, list.size() ); list = new ArrayList(); StatefulKnowledgeSession kstateful = (StatefulKnowledgeSession) ((StatefulKnowledgeSession) context.getBean( "ksession2" )); kstateful.setGlobal( "list", list ); kstateful.insert( new Person( "Darth", "Cheddar", 50 ) ); kstateful.fireAllRules(); assertEquals( 2, list.size() ); } public void test2() { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( "org/drools/container/spring/beans.xml" ); ServiceManager sm = (ServiceManager) context.getBean( "sm1" ); List list = new ArrayList(); StatelessKnowledgeSession kstateless = (StatelessKnowledgeSession) sm.lookup( "stateless1" ); kstateless.setGlobal( "list", list ); kstateless.execute( new Person( "Darth", "Cheddar", 50 ) ); assertEquals( 2, list.size() ); list = new ArrayList(); StatefulKnowledgeSession kstateful = (StatefulKnowledgeSession) sm.lookup( "ksession2" ); kstateful.setGlobal( "list" list ); kstateful.insert( new Person( "Darth", "Cheddar", 50 ) ); kstateful.fireAllRules(); assertEquals( 2, list.size() ); } There is still lots more to do, especially around exposing actual configuration information (JPA etc) and initial setup data (globals, inserted facts) along with extending this to work with Camel. So if you want to help, you know where to find us :) IRC <http://labs.jboss.org/drools/irc.html> Mailing Lists <http://labs.jboss.org/drools/lists.html>

14 years, 6 months

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Re: [rules-dev] drools and google app engine

by Greg Barton

Continual Employment Prospects. Or Complex Event Processing. :) GreG On Oct 25, 2009, at 22:04, Pradeep Pujari <Pradeepp(a)rocketmail.com> wrote: GAE stands for Google App Engine What is CEP means? Thanks, Pradeep --- On Sun, 10/25/09, Michael Neale <michael.neale(a)gmail.com> wrote: From: Michael Neale <michael.neale(a)gmail.com> Subject: Re: [rules-dev] drools and google app engine To: "Rules Dev List" <rules-dev(a)lists.jboss.org> Date: Sunday, October 25, 2009, 7:43 PM Hi Jess - I have experience with GAE - but never thought to try drools on it. Certainly should be possible - a few little tweaks might be needed to avoid verboten APIs. However, the main thing that "cramps its style" is the fact that apps on GAE really should be stateless (in order to scale) but I guess that if you can cope with a session suddenly moving then it might work out (or just use stateless rules). On Mon, Oct 26, 2009 at 1:31 PM, <youknowwho(a)heroicefforts.net> wrote: I saw an earlier post where someone ran into file access issues deploying the Drools engine on Google's platform. It seems like a relatively simple task to overcome this with an aspect and a weave. But before I attempt it, I was curious if anyone had managed to get Drools running in the app engine environment? If so, was that the only issue encountered and what was the level of effort? I was thinking it might be a fun learning exercise to leverage GAE and CEP in the creation of Google Wave Robots. I know, I have too much time on my hands. cheers, -Jess _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev -- Michael D Neale home: www.michaelneale.net blog: michaelneale.blogspot.com _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev

14 years, 6 months

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drools and google app engine

by youknowwho＠heroicefforts.net

I saw an earlier post where someone ran into file access issues deploying the Drools engine on Google's platform. It seems like a relatively simple task to overcome this with an aspect and a weave. But before I attempt it, I was curious if anyone had managed to get Drools running in the app engine environment? If so, was that the only issue encountered and what was the level of effort? I was thinking it might be a fun learning exercise to leverage GAE and CEP in the creation of Google Wave Robots. I know, I have too much time on my hands. cheers, -Jess

14 years, 6 months

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backward-chaining

by kesslerb＠uni-trier.de

Hi everyone, I am working on a project that would profit from a backward-chaining rulesengine. I`ve read in the Drools Expert documentation that you plan to provide support for it in the future. Is there any concrete plan to implement it, or any estimation of when would backward-chaining support be available? Mariana

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III Drools Boot Camp and ORF 2009

by Mark Proctor

Posted by Edson Tirelli http://blog.athico.com/2009/10/iii-drools-boot-camp-and-orf-2009.html Just a friendly reminder, the III Drools Boot Camp and the October Rules Fest 2009 <http://www.octoberrulesfest.org/> in Dallas start this Sunday, October 25th. If you didn't signed yet, there might still be time! If you can't go, I feel sorry for you! ;) Previous posts about the subject here <http://blog.athico.com/2009/09/drools-boot-camp-dallas-october-25th.html> and here <http://blog.athico.com/2009/09/iii-drools-boot-camp-at-october-rules.html>. See you all there, Edson

14 years, 6 months

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Drools Flow and Seam Integration

by Raphael Duarte Paiva

Hello! I've learned from thiswillwill post<http://blog.athico.com/2009/06/seam-drools-integration.html> that there will be Drools Flow support in Seam. My team chose to use JBPM instead of Drools Flow because of the poor integration between Drools Flow and Seam. I'd like to know exactly what level of integration you guys are planning to implement. Will there be features like process persistence managing and Annotation-based management (Like @StartTask and the like) ? Is there any guesses on how far in the future this integration is? Thanks in advance! -- Abraços Raphael Duarte Paiva Graduando em Ciência da Computação "For millions of years, mankind lived just like the animals. Then something happened which unleashed the power of our imagination. We learned to talk [...]" - Stephen Hawking, 1993

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MVEL in functions?

by Michael Neale

Hey is mvel in functions broken? I have a distant memory of something along these lines. I was just trying something like: package jboss.cloud dialect "mvel" #trying to get functions working... rule "something" when s: SimpleFact(id == 42, name == "michael") then System.out.println("hello"); end function String doSomething() { return "hey"; } And I get: java.lang.NullPointerException at org.drools.rule.builder.dialect.mvel.MVELDialect.compile(MVELDialect.java:510) at org.drools.rule.builder.dialect.mvel.MVELDialect.addFunction(MVELDialect.java:338) at org.drools.compiler.PackageBuilder.addFunction(PackageBuilder.java:1104) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:626) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:290) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25) (haven't tried trunk) - anyone else seen this? removing the dialect "mvel" at the package level at it is fine. -- Michael D Neale home: www.michaelneale.net blog: michaelneale.blogspot.com

14 years, 6 months

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is there a way to get "declare"s out of the working memory?

by leif hanack

Hi, since Drools 5 it is possible to define a dynamic variable holder by using the declare notation. This feature is really cool. I can create easily helper rules, that calculate temporary values: File: calculate_total_amount.drl declare TotalAmount amount : Money end rule "calculate total amount" when .. then TotalAmount totalAmount = new TotalAmount(); totalAmount.setAmount($calculatedAmount); insert(totalAmount); end Inside another file I use this helper. File: another_rule.drl rule "another rule" when TotalAmount( amount > 1000) then // do s.th. end I unit test my rule by querying a fact and verify my assertions. This works fine, as long as the fact is a class of my factmodel. Now my question: Is there a way to query a declared class (in this case TotalAmount) I tried it with some variations but without success: import my.package.of.the.rule; query "get total amount" amount : TotalAmount() end I thought that a declare is compiled to a class, but I can not find it in the generated classes. Did you have any help? An alternative might be to create a holder class. S.th. like that rule "calculate total amount" .. then TotalAmount totalAmount = new TotalAmount(); totalAmount.setAmount($calculatedAmount); insert(totalAmount); Holder holder = new Holder(); holder.setObject(totalAmount); insert(holder); end import my.package.holder; query "get holder" holder : Holder() end Thanks in advance, Leif

14 years, 6 months

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rules-dev October 2009