Re: [rules-users] Drools in non-eclipse environment

That's exactly what I am trying out at the moment .. option - b. Pre-compile, serialize and unserialize ...I'll share the results. Also rule file's there at the location mentioned. So that's not a problem. I've gone through the blog you mentioned ... and as you indicated, it's only jbpm .. no rules ... thanks abhay ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Michael Anstis Sent: Thursday, June 09, 2011 4:07 PM To: Rules Users List Subject: Re: [rules-users] Drools in non-eclipse environment Preparing to be shouted down, but isn't it impossible to compile DRL on Android and the suggestion is to load pre-serialised KnowledgeBases? Also, as another observation, are you sure the DRL was indeed found and the NPE is not caused by "com.ts.DBconnector.readKnowledgeBase(DBconnector.java:143)" perhaps passing a null to KnowledgeBuilder? Have you looked at http://blog.athico.com/2011/03/jbpm5-lightweight-running-on-android.html, which might give some pointers - although it is only jBPM and not rules themselves. With kind regards, Mike On 9 June 2011 11:11, Abhay B. Chaware <Abhay.Chaware@kpitcummins.com<mailto:Abhay.Chaware@kpitcummins.com>> wrote: This is what I did. Properties properties = new Properties(); properties.put("drools.dialect.java.compiler", "JANINO"); KnowledgeBuilderConfiguration kbConfig = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration( properties, (ClassLoader[]) null ); KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(kbConfig); kbuilder.add(ResourceFactory.newInputStreamResource(is), ResourceType.DRL); I am getting same error with KnowledgeBuilderConfiguration .. W/System.err(27303): java.lang.NullPointerException W/System.err(27303): at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:47) W/System.err(27303): at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1161) W/System.err(27303): at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:637) W/System.err(27303): at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:267) W/System.err(27303): at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:459) W/System.err(27303): at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) W/System.err(27303): at com.ts.DBconnector.readKnowledgeBase(DBconnector.java:143) W/System.err(27303): at com.first.FirstActivity.onCreate(FirstActivity.java:64) W/System.err(27303): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) W/System.err(27303): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) W/System.err(27303): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) W/System.err(27303): at android.app.ActivityThread.access$2300(ActivityThread.java:125) ________________________________________ From: rules-users-bounces@lists.jboss.org<mailto:rules-users-bounces@lists.jboss.org> [rules-users-bounces@lists.jboss.org<mailto:rules-users-bounces@lists.jboss.org>] On Behalf Of Wolfgang Laun [wolfgang.laun@gmail.com<mailto:wolfgang.laun@gmail.com>] Sent: Thursday, June 09, 2011 2:46 PM To: Rules Users List Subject: Re: [rules-users] Drools in non-eclipse environment You might try this: Properties props = new Properties(); props.put( "drools.dialect.java.compiler", "JANINO" ); KnowledgeBuilderConfiguration kbConfig = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration( props, (ClassLoader[]) null ); Requires the janino jar in your classpath, which I have as ~/.m2/repository/janino/janino/2.5.15/janino-2.5.15.jar -W On 9 June 2011 10:29, Abhay B. Chaware <Abhay.Chaware@kpitcummins.com<mailto:Abhay.Chaware@kpitcummins.com><mailto:Abhay.Chaware@kpitcummins.com<mailto:Abhay.Chaware@kpitcummins.com>>> wrote: I am using drools 5.1.0 Let me explain what I am trying to do. I am trying to write a drools app on to android platform. In my app, I have added following jars in the application classpath - antlr-runtime.jar drools-api.jar drools-compiler.jar drools-core.jar mvel2.jar Do I need any other jar files ? upon drilling down into the Null Pointer Exception, it appears that it is throwing NPE at following line inside RuleBuilder.java RuleConditionBuilder builder = (RuleConditionBuilder)context.getDialect().getBuilder(ruleDescr.getLhs().getClass()); and on further drilling, I found that "context.getDialect()" is retuning NULL. Then I put some debug inside PackageBuilder.java upon drilling down for the error, found out that it is not able to set the context's dialect. ctr.getDialect(pkgRegistry.getDialect()) gives "null" ... DialectCompiletimeRegistry ctr = pkgRegistry.getDialectCompiletimeRegistry(); RuleBuildContext context = new RuleBuildContext(this, ruleDescr, ctr, pkg, ctr.getDialect(pkgRegistry.getDialect())); Is there any default setting /configuration that I am obviously missing ? what could be the problem ? -abhay ________________________________________ From: rules-users-bounces@lists.jboss.org<mailto:rules-users-bounces@lists.jboss.org><mailto:rules-users-bounces@lists.jboss.org<mailto:rules-users-bounces@lists.jboss.org>> [rules-users-bounces@lists.jboss.org<mailto:rules-users-bounces@lists.jboss.org><mailto:rules-users-bounces@lists.jboss.org<mailto:rules-users-bounces@lists.jboss.org>>] On Behalf Of Swindells, Thomas [TSwindells@nds.com<mailto:TSwindells@nds.com><mailto:TSwindells@nds.com<mailto:TSwindells@nds.com>>] Sent: Thursday, June 09, 2011 1:40 PM To: Rules Users List Subject: Re: [rules-users] Drools in non-eclipse environment Which version of drools is this? For drools 5.0.1 we just use maven to resolve the dependencies for us and it works fine. I can't obviously see any eclipse compiler in the jars that we distribute with our application. Thomas ************************************************************************************** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmaster@nds.com<mailto:postmaster@nds.com><mailto:postmaster@nds.com<mailto:postmaster@nds.com>> and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. 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