Drools rules engine for LR-CE-6.1.1-GA2

[Pranay Sanam, módosítva 11 év-val korábban]

Hi Friends,

Could some one please help how to integrate rules engine for Liferay-CE-6.1.1-GA2.

I've been referring This Tutorial for help but stopped at adding Liferay-portlet-archetype.

Thanks,
Pranay

[Pranay Sanam, módosítva 11 év-val korábban]

Plz see through this guys

[David H Nebinger, módosítva 11 év-val korábban]

The integration blog deals with using the drools plugins for integrating drools into EE. It provides portlets that have visibility into the drools engine.

That said, EE and the drools plugins are not necessary to use drools.

Drools comes as a bunch of jars. You can include them in your own plugin and create the appropriate objects manually, i.e. populating rules and working memory with your facts. You can then evaluate the rules and get your own results and do whatever with them.

No magic, no serious integration stuff, etc. You just don't get the functionality that the drools EE plugins provide...

[Sushil Kumar Saini, módosítva 11 év-val korábban]

Thanks David,.. for this useful information..

[Hitoshi Ozawa, módosítva 11 év-val korábban]

David, I don't that wiki is about drools in EE. I think the question is basically on how to use archtype.

[David H Nebinger, módosítva 11 év-val korábban]

The question, though, was how to use drools in CE and how he stopped early in.

I explained how to use drools in CE. Following the blog is not going to help him since he has neither EE or the drools EE plugin...

[Hitoshi Ozawa, módosítva 11 év-val korábban]

Wow, does liferay's drools plugin require one to download drools and do all that? Seems too complicated for most regular users to use.

[David H Nebinger, módosítva 11 év-val korábban]

Don't know, I've never had need of it.

I have used drools however within a portlet. Drools is a great rules engine, useful for many tasks.

I'm just not sure what value add there is with the drools plugins... I'm guessing they have some interface elements for the underlying engine and such.

[Pranay Sanam, módosítva 11 év-val korábban]

David H Nebinger:

That said, EE and the drools plugins are not necessary to use drools.

Drools comes as a bunch of jars. You can include them in your own plugin and create the appropriate objects manually, i.e. populating rules and working memory with your facts. You can then evaluate the rules and get your own results and do whatever with them.

Thank u very much for replying sir.. but can u please elaborate on that or can u post a link or something that has details about what u've said?

U meant to say that just put those JARS in portlet project and we can use the functionality??

The problem with what i've tried is I couldn't get the archetypes anywhere. and i think it isn't going to be possible without those.

[David H Nebinger, módosítva 11 év-val korábban]

That's a maven issue. Maven support is very new to Liferay and I don't believe they have all of the issues straightened out yet.

Just use the IDE and the SDK to create a standard portlet plugin, add your jars to it, and do the development without maven.

[Pranay Sanam, módosítva 11 év-val korábban]

Hi,

like u said i have downloaded a sample drools portlet which was built with the set of drools-jars.

now when i run the portlet in portal it is giving the following errors i m giving the log here....

org.drools.RuntimeDroolsException: Unable to load dialect 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java:org.drools.rule.builder.dialect.java.JavaDialectConfiguration'
	at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:283)
	at org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:268)
	at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:181)
	at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:159)
	at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:210)
	at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:143)
	at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:34)
	at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:47)
	at main.java.com.liferay.insurance.InsurancePortlet.readKnowledgeBase(InsurancePortlet.java:107)
	at main.java.com.liferay.insurance.InsurancePortlet.processAction(InsurancePortlet.java:75)
	at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:70)
	at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:48)
	at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:111)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:72)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:73)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:593)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:530)
	at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:534)
	at com.liferay.portlet.InvokerPortletImpl.invokeAction(InvokerPortletImpl.java:579)
	at com.liferay.portlet.InvokerPortletImpl.processAction(InvokerPortletImpl.java:294)
	at com.liferay.portal.action.LayoutAction.processPortletRequest(LayoutAction.java:944)
	at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:688)
	at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:249)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
	at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:176)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
	at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:560)
	at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:537)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:72)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:294)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:73)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
	at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:138)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:72)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:335)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:123)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:294)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:241)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:246)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.servlet.filters.sso.ntlm.NtlmPostFilter.processFilter(NtlmPostFilter.java:83)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:80)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:163)
	at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:216)
	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:57)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:187)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:95)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:206)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:108)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:167)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:95)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:167)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:95)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:187)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:95)
	at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:73)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:722)
Caused by: org.drools.RuntimeDroolsException: value '1.7' is not a valid language level
	at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.getDefaultLanguageLevel(JavaDialectConfiguration.java:162)
	at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:57)
	at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:279)
	... 142 more</init></init></init>

Please help me with this...

I've searched all the web but couldn't find a solution.

Thanks in advance

[Pranay Sanam, módosítva 11 év-val korábban]

hi friends please see through this once..

[Juan Gonzalez P, módosítva 11 év-val korábban]

Seems isn't compatible with JDK 1.7? Try with 1.6.

[Pranay Sanam, módosítva 11 év-val korábban]

hi Gonzalez,

Thank you so much 4 that reply.

trying with 1.6 means.. should i install jdk 1.6 or just changing the version number of jdk in project facets is enough???

i've already tried the latter one but of no use!!

[Juan Gonzalez P, módosítva 11 év-val korábban]

I suppose you'd have to change the JDK that is running your app server. That would imply changing JAVA_HOME, JRE_HOME etc depending in your environment and server (Tomcat, etc).