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

woo hooo ! I got past that problem J But a new one’s here now. Looks like MVEL is not liking something J 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(a)lists.jboss.org [mailto: rules-users-bounces(a)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(a)kpitcummins.com&gt; 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(a)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(a)kpitcummins.com&gt; 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(a)lists.jboss.org [ rules-users-bounces(a)lists.jboss.org] On Behalf Of Wolfgang Laun [ wolfgang.laun(a)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(a)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(a)lists.jboss.org&lt;mailto: rules-users-bounces(a)lists.jboss.org&gt; [rules-users-bounces(a)lists.jboss.org <mailto:rules-users-bounces@lists.jboss.org>] On Behalf Of Swindells, Thomas [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 > -----Original Message----- > From: rules-users-bounces(a)lists.jboss.org&lt;mailto: rules-users-bounces(a)lists.jboss.org&gt; [mailto:rules-users-<mailto: rules-users-> > bounces@lists.jboss.org<mailto:bounces@lists.jboss.org>] On Behalf Of Abhay B. Chaware > Sent: 09 June 2011 08:06 > To: rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org> > Subject: [rules-users] Drools in non-eclipse environment > > Has anyone tried using drools in non-eclipse env ? meaning that > org.eclipse.jdt.core_3.5.1.v_972_R35x.jar is not in the classpath ? > > Documentation says this : > > (http://docs.huihoo.com/drools/4.0.7/ch02s05.html) > > if you do not have Eclipse JDT Core in your classpath you must override the > compiler setting before you instantiate this PackageBuilder, you can either > do that with a packagebuilder properties file the ChainedProperties class will > find, or you can do it programmatically as shown below; note this time I use > properties to inject the value for startup. > > They also provide an example, but I am not able to figure out exactly how to > use this example/info. > > Here is my code : > > KnowledgeBuilder kbuilder = > KnowledgeBuilderFactory.newKnowledgeBuilder(); > kbuilder.add(ResourceFactory.newInputStreamResource(is), > ResourceType.DRL); > > where "is" is input stream containing the rule file ( .drl) > > How do I override the compiler setting ? > > I am getting a null pointer exception ( see below ) and I suspect that > overriding the packagebuilderconfiguration will fix it ? > > W/System.err(25511): java.lang.NullPointerException > W/System.err(25511): at > org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:47) > W/System.err(25511): at > org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1161) > W/System.err(25511): at > org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:637) > W/System.err(25511): at > org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java > :267) > W/System.err(25511): at > org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder > .java:459) > W/System.err(25511): at > org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.ja > va:28) > W/System.err(25511): at > com.ts.DBconnector.readKnowledgeBase(DBconnector.java:146) > > > > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org> > https://lists.jboss.org/mailman/listinfo/rules-users ************************************************************************************** This message is confidential and intended only for the addressee. 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