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

Any ideas folks ? ________________________________ From: Abhay B. Chaware Sent: Friday, June 10, 2011 12:54 PM To: 'Rules Users List' Subject: RE: [rules-users] Drools in non-eclipse environment The ride's real fun :) Got apache harmony's beans.jar to work .. now , when I am reading the serialized knowledgebase object on android, quite obvious, it is throwing this error - java.lang.UnsupportedOperationException: can't load this type of class file since my serialized knowledgebase object is in java format .. and not dex. Can this serialized version be converted into .dex format using the "dx" utility - pre or post serialization ? I tried the "dx" tool on the serialized object, but it doesn't seem to understand the format. -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 6:37 PM To: Rules Users List Subject: Re: [rules-users] Drools in non-eclipse environment http://meteatamel.wordpress.com/2010/08/25/android-api-and-java-beans-pac... http://meteatamel.wordpress.com/2010/09/28/android-api-and-java-beans-pac... Enjoy the ride ;) 2011/6/9 Abhay B. Chaware <Abhay.Chaware@kpitcummins.com<mailto:Abhay.Chaware@kpitcummins.com>> woo hooo ! I got past that problem :) But a new one's here now. Looks like MVEL is not liking something :) W/dalvikvm(29977): VFY: unable to resolve static method 164: Ljava/beans/Introspector;.decapitalize (Ljava/lang/String;)Ljava/lang /String; W/dalvikvm(29977): threadid=1: thread exiting with uncaught exception (group=0x40020ac0) E/AndroidRuntime(29977): FATAL EXCEPTION: main E/AndroidRuntime(29977): java.lang.NoClassDefFoundError: java.beans.Introspector E/AndroidRuntime(29977): at org.drools.core.util.asm.ClassFieldInspector.calcFieldName(ClassFieldInspector.java:298) E/AndroidRuntime(29977): at org.drools.core.util.asm.ClassFieldInspector.addToMapping(ClassFieldInspector.java:216) E/AndroidRuntime(29977): at org.drools.core.util.asm.ClassFieldInspector.processClassWithoutByteCode(ClassFieldInspector.ja va:148) E/AndroidRuntime(29977): at org.drools.core.util.asm.ClassFieldInspector.<init>(ClassFieldInspector.java:83) E/AndroidRuntime(29977): at org.drools.core.util.asm.ClassFieldInspector.<init>(ClassFieldInspector.java:64) E/AndroidRuntime(29977): at org.drools.base.ClassFieldAccessorFactory.getClassFieldReader(ClassFieldAccessorFactory.java:11 8) E/AndroidRuntime(29977): at org.drools.base.ClassFieldAccessorCache$CacheEntry.getReadAccessor(ClassFieldAccessorCache.java :168) E/AndroidRuntime(29977): at org.drools.base.ClassFieldAccessorCache.getReadAcessor(ClassFieldAccessorCache.java:101) E/AndroidRuntime(29977): at org.drools.base.ClassFieldAccessorStore.wire(ClassFieldAccessorStore.java:404) E/AndroidRuntime(29977): at org.drools.base.ClassFieldAccessorStore.wire(ClassFieldAccessorStore.java:374) E/AndroidRuntime(29977): at org.drools.common.AbstractRuleBase.readExternal(AbstractRuleBase.java:295) E/AndroidRuntime(29977): at org.drools.reteoo.ReteooRuleBase.readExternal(ReteooRuleBase.java:236) E/AndroidRuntime(29977): at org.drools.impl.KnowledgeBaseImpl.readExternal(KnowledgeBaseImpl.java:108) E/AndroidRuntime(29977): at java.io.ObjectInputStream.readNewObject(ObjectInputStream.java:2127) E/AndroidRuntime(29977): at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:929) E/AndroidRuntime(29977): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:2285) E/AndroidRuntime(29977): at java.io.ObjectInputStream.readObject(ObjectInputStream.java:2240) E/AndroidRuntime(29977): at com.ts.DBconnector.execPackageByPath(DBconnector.java:219) E/AndroidRuntime(29977): at com.first.FirstActivity.onCreate(FirstActivity.java:77) E/AndroidRuntime(29977): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) E/AndroidRuntime(29977): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) E/AndroidRuntime(29977): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) E/AndroidRuntime(29977): at android.app.ActivityThread.access$2300(ActivityThread.java:125) E/AndroidRuntime(29977): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) E/AndroidRuntime(29977): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime(29977): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime(29977): at android.app.ActivityThread.main(ActivityThread.java:4627) E/AndroidRuntime(29977): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(29977): at java.lang.reflect.Method.invoke(Method.java:521) E/AndroidRuntime(29977): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) E/AndroidRuntime(29977): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) E/AndroidRuntime(29977): at dalvik.system.NativeStart.main(Native Method) ________________________________ 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>] On Behalf Of Michael Anstis Sent: Thursday, June 09, 2011 4:51 PM To: Rules Users List Subject: Re: [rules-users] Drools in non-eclipse environment Great news :) Please do feedback... if you get it working I'll make a blog entry on your behalf as you are not the first (or last) to try Drools on Android. With kind regards, Mike 2011/6/9 Abhay B. Chaware <Abhay.Chaware@kpitcummins.com<mailto:Abhay.Chaware@kpitcummins.com>> 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@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 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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