[rules-users] Unable to load dialect java from Ant task
Edson Tirelli
tirelli at post.com
Mon Sep 22 10:54:05 EDT 2008
Dependencies:
https://svn.jboss.org/repos/labs/labs/jbossrules/branches/4.0.x/README_DEPENDENCIES.txt
[]s
Edson
2008/9/22 Justin Case <send_lotsa_spam_here at yahoo.com>
> 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 at post.com> 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 at yahoo.com>
> >
> > > 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 at 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 at 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
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