[jboss-jira] [JBoss JIRA] Closed: (JBRULES-378) NoClassDefFoundError at org.drools.compiler.PackageBuilder.loadCompiler

[Mark Proctor (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBRULES-378?page=all ]

Mark Proctor closed JBRULES-378.
--------------------------------

    Resolution: Duplicate Issue

This is  alreayd fixed in SVN head and will be released in 3.0.3

> NoClassDefFoundError at org.drools.compiler.PackageBuilder.loadCompiler
> -----------------------------------------------------------------------
>
>                 Key: JBRULES-378
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-378
>             Project: JBoss Rules
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Drl Parser/Builder
>    Affects Versions: 3.0.2
>         Environment: -Linux 2.4.26;
> -Sun JDK 1.5.0_06;
> -Eclipse 3.2.0 M20060629-1905;
> -Jar classpath entries:
> antlr-2.7.6.jar                    
> antlr-3.0ea8.jar                   
> colt-1.2.0.jar                     
> commons-collections-3.1.jar        
> commons-io-1.1.jar                 
> commons-jci-core-1.0-406301.jar    
> commons-jci-eclipse-3.2.0.666.jar  
> commons-jci-janino-2.4.3.jar       
> commons-lang-2.1.jar               
> commons-logging-api-1.0.4.jar      
> concurrent-1.3.4.jar               
> drools-compiler.jar                
> drools-core.jar
> drools-decisiontables.jar
> drools-jsr94.jar
> janino-2.4.3.jar
> jsr94-1.1.jar
> jung-1.7.2.jar
> junit-3.8.1.jar
> poi-2.5.1-final-20040804.jar
> stringtemplate-2.3b6.jar
> xercesImpl-2.6.2.jar
> xml-apis-1.0.b2.jar
> xpp3-1.1.3.4.O.jar
> xstream-1.1.3.jar       
>            Reporter: Mihai Florea
>         Assigned To: Mark Proctor
>
> When trying to run the HelloWorldExample from drools-samples, I ended up with the following error:
> java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/compiler/env/INameEnvironment
> 	at org.drools.compiler.PackageBuilder.loadCompiler(Unknown Source)
> 	at org.drools.compiler.PackageBuilder.<init>(Unknown Source)
> 	at org.drools.compiler.PackageBuilder.<init>(Unknown Source)
> 	at org.drools.examples.HelloWorldExample.readRule(HelloWorldExample.java:49)
> 	at org.drools.examples.HelloWorldExample.main(HelloWorldExample.java:21)
> The "eclipse" part from the error message seemed quite to me strange since I specified it to use the Janino compiler with 
>    -Ddrools.compiler=JANINO -Ddrools.compiler.lnglevel=1.4 
> I was running the example from within Eclipse, having all the required libraries in classpath (not the DROOLS/JBoss Rules library, but the jar files added manually).
> Taking a look at "loadCompiler()" method in org.drools.compiler.PackageBuilder, I noticed a missing break in the switch statement, which is the cause of the problem IMHO.
>     private void loadCompiler() {
>         switch ( configuration.getCompiler() ) {
>             case PackageBuilderConfiguration.JANINO : {
>                 if ( !"1.4".intern().equals( configuration.getJavaLanguageLevel() ) ) throw new RuntimeDroolsException( "Incompatible Java language level with selected compiler" );
>                 compiler = JavaCompilerFactory.getInstance().createCompiler("janino");
>             }
>             // I believe we should have a "break" statement at this line, unless we want the system properties to be ignored
>             case PackageBuilderConfiguration.ECLIPSE :
>             default : {
>                 EclipseJavaCompilerSettings eclipseSettings = new EclipseJavaCompilerSettings();
>                 eclipseSettings.getMap().put( "org.eclipse.jdt.core.compiler.codegen.targetPlatform",
>                                               configuration.getJavaLanguageLevel() );
>                 eclipseSettings.getMap().put( "org.eclipse.jdt.core.compiler.source",
>                                               configuration.getJavaLanguageLevel() );
>                 compiler = new EclipseJavaCompiler( eclipseSettings );
>             }
>         }
>     }
> Adding the "break" and recompiling the library seemed to solve the problem, however now I am getting the same error message when trying to use the Eclipse compiler:
>   -Ddrools.compiler=ECLIPSE -Ddrools.compiler.lnglevel=5.0 

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