[rules-users] Drools Sample Project Won't Execute on Spring STS IDE 2.3.2

[Jason Mihalick]

Versions involved:

IDE: Spring STS 2.3.2.RELEASE
Eclipse Drools Plugin: 5.1.1 (Includes JBoss Drools Core, JBoss Drools
Guvnor, JBoss Drools Task)
Java: JDK 1.6.0_11
Platform:  Windows XP

1) Create a sample Drools application using the New Project Wizard and
selecting "Drools Project"

2) Name it MyDroolsProject

3) Check all options on the add sample classes (e.g., 'Add a sample
HelloWorld rule file to this project', etc.)

4) Check to 'Use default Drools Runtime (currently Drools 5.1.0 runtime)'. 
Also choose to Generate code compatible with 'Drools 5.1.x'.  Click Finish.

5) In your newly created 'MyDroolsProject', drill down to
com.sample.DecisionTableTest.java, right click and choose to 'Run As | Java
Application'

The following stack trace ensues.  (Note, yes, I do have the STS Groovy
plugin installed)

Warning:  Cell at E21 not present - adding a blank
Build groovy files option has not been set one way or the other: use
'options.put(CompilerOptions.OPTIONG_BuildGroovyFiles,
CompilerOptions.ENABLED);'
java.lang.NoClassDefFoundError: org/eclipse/core/runtime/Plugin
      at java.lang.ClassLoader.defineClass1(Native Method)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
      at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
      at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
      at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
      at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
      at
org.eclipse.jdt.internal.compiler.Compiler.initializeParser(Compiler.java:755)
      at
org.eclipse.jdt.internal.compiler.Compiler.<init>(Compiler.java:312)
      at
org.eclipse.jdt.internal.compiler.Compiler.<init>(Compiler.java:177)
      at
org.drools.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:349)
      at
org.drools.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:51)
      at
org.drools.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:389)
      at
org.drools.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:56)
      at
org.drools.compiler.PackageRegistry.compileAll(PackageRegistry.java:74)
      at
org.drools.compiler.PackageBuilder.compileAll(PackageBuilder.java:677)
      at
org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:640)
      at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:254)
      at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:484)
      at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:34)
      at
com.sample.DecisionTableTest.readKnowledgeBase(DecisionTableTest.java:44)
      at com.sample.DecisionTableTest.main(DecisionTableTest.java:25)
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.Plugin
      at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
      at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
      ... 27 more
 


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