Re: [rules-users] Unable to load dialect java from Ant task

Thanks a lot for the answer. The problem is exactly that one: how could I know what the dependencies for the DRools compiler are?! I thought this list would know :)) Anyway, I'll print out the Eclipse runtime classpath and compare them two to see what stands out. The Ant task is mentioned here and there in the documentation (albeit without examples) so I kinda thought more people are using it. An older thread of this same list talks about adding (only) the drools-ant to the classpath, which of course solves the ant task itself but none of its dependencies... I find it difficult to believe that the compiler depends on some Eclipse stuff, especially after I added ALL the jars existing in the Eclipse configuration. The only thing I cannot directly rule out is the classloader issue, but that's also the only thing I have no idea how to debug/solve :( Thank you, M --- On Sun, 9/21/08, Edson Tirelli <tirelli(a)post.com&gt; wrote: > This is always related to classpath problems. Make sure you have all > dependencies set in your classpath and if that does not work, maybe > make an> example project with the error available somewhere that > another person can take a look at it. (don't think you can send zip > attachements to the list, but not sure). > > Eclipse-plugin embeds a series of dependency jars that are > transparently added to the classpath. That is the major reason you may > see the problem outside of eclipse, but not inside. Classloader > configuration is also another reason. > > []s > Edson > > 2008/9/18 Soterro <send_lotsa_spam_here(a)yahoo.com&gt; > > >> Hi all, >> >> I have a perfectly running Eclipse 3.3 with DRools >> > 4.0.4 and JDK 1.5.14. > >> The rules are compiled with a post build Ant task >> > which uses Janino (need > >> it for Tomcat compatibility). >> Now OUTSIDE Eclipse it seems I cannot use that Ant >> > task to save my life :( > >> I tried switching from Janino to the default compiler, >> > same thing. I always > >> get this infamous error: >> >> BUILD FAILED >> E:\buildRules-hudson.xml:30: RuleBaseTask failed: >> > Unable to load dialect > > 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java' > >> at >> >> > com.csc.ezbook.eztarif.rules.DroolsCompilerAntTaskStandalone.execute > >> (DroolsCompilerAntTaskStandalone.java:163) >> at >> >> > org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) > >> at >> > sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > >> at >> >> > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. > >> java:39) >> at >> > sun.reflect.DelegatingMethodAccessorImpl.invoke( > >> DelegatingMethodAccessorImpl.java:25) >> at >> > java.lang.reflect.Method.invoke(Method.java:585) > >> at >> >> > org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java > >> :105) >> at >> > org.apache.tools.ant.Task.perform(Task.java:348) > >> [...] >> Caused by: org.drools.RuntimeDroolsException: Unable >> > to load dialect > > 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java' > >> at >> > org.drools.compiler.PackageBuilderConfiguration.addDialect( > >> PackageBuilderConfiguration.java:152) >> at >> > org.drools.compiler.PackageBuilderConfiguration. > >> >> > buildDialectConfigurationMap(PackageBuilderConfiguration.java:140) > >> at >> > org.drools.compiler.PackageBuilderConfiguration.init( > >> PackageBuilderConfiguration.java:117) >> at >> > org.drools.compiler.PackageBuilderConfiguration.<init>( > >> PackageBuilderConfiguration.java:94) >> at >> >> > com.my.app.rules.DroolsCompilerAntTaskStandalone.getPackageBuilder( > >> DroolsCompilerAntTaskStandalone.java:257) >> at >> > com.my.app.rules.DroolsCompilerAntTaskStandalone.execute( > >> DroolsCompilerAntTaskStandalone.java:136) >> >> That "DroolsCompilerAntTaskStandalone" is my >> > task using the default > >> compiler like this: >> PackageBuilderConfiguration conf = new >> > PackageBuilderConfiguration(); > >> conf.setClassLoader( loader ); >> PackageBuilder builder = new PackageBuilder( conf >> > ); > >> If I use Janino like below the error is exactly the >> > same... > >> PackageBuilderConfiguration pkgBuilderCfg = new >> PackageBuilderConfiguration(); >> pkgBuilderCfg.setClassLoader( loader ); >> JavaDialectConfiguration javaConf = >> > (JavaDialectConfiguration) > >> pkgBuilderCfg.getDialectConfiguration( >> > "java" ); > >> javaConf.setCompiler( >> > JavaDialectConfiguration.JANINO ); > >> PackageBuilder builder = new PackageBuilder( >> > pkgBuilderCfg ); > >> Again, in Eclipse all is working fine. I checked >> > Ant's classpath, here it > >> is: >> >> > E:\apache-ant-1.7.0\bin\..\lib\ant-launcher.jar > >> E:\apache-ant-1.7.0\lib\*.jar >> C:\Program >> > Files\Java\jdk1.5.0_14\lib\tools.jar > >> Here is how I provide a classpath: >> <taskdef name="rulescompiler" >> > classname="com.my.app.rules. > >> DroolsCompilerAntTaskStandalone" >> classpathref="droolsutils.classpath" /> >> >> <target depends="newfilesarethere" >> > name="build" > >> unless="rulesCompile. >> notRequired"> >> <rulescompiler >> > srcdir="${THIS_PROJ}/src/com/my/app/rules" > >> > tofile="${THIS_PROJ}/build/classes/com/my/app/rules/ > >> packaged.rules" >> >> > classpathref="droolsutils.classpath" > > >> <include name="*.drl" >> > /> > >> </rulescompiler> >> </target> >> >> The classpath I provide contains pretty much all >> > libraries I use normally > >> in the project, but I tried even to add ALL jar's >> > from the Eclipse 3.3 > >> install directory (that would include all DRools 4.0.4 >> > libraries, with antlr > >> and whatnot) >> >> I tried also with DRools 4.0.7, same behaviour... >> >> What does that mean and where is it coming from? Could >> > it have issues with > >> the tools.jar from Java 1.5.0_14? >> >> Thank you for any input, >> M >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > -- > Edson Tirelli > JBoss Drools Core Development > JBoss, a division of Red Hat @ www.jboss.com > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users