Unknown KieSession name in drools 6.0 (while trying to add drools to existing maven/eclipse project)

Question

I am trying to adapt drools6.0 for an existing code base (it is maven project under eclipse). I didnt had need to learn drools or maven before (though they were part of my p

Answer 1

I hit similar problems.

I think that part of the problem is trying to live in both worlds. The JBoss Drools eclipse plugin world and the maven world.

I have Eclipse 4.3.1 (Kepler) with various Jboss/Drools plugins installed.

I took a working eclipse example and made sure I could run it in maven.

1. Created a demo drools project File->New->Other..->Drools->Drools Project
2. Ensured you could run the test programs DroolsTest
3. Converted project to maven project - Configure->Convert To Maven Project (This will create a pom.xml file with many dependencies. These can be prunes)
4. Removed the Drools Library from the build path - in the project properties Build Path -> Libraries - select Drools Library and click Remove
5. Disable the Drools builder - in project properties Builders -> uncheck Drools Builder
6. Comment out dependancy jsr94 from the pom.xml(not retrievable)
7. Run maven from the command line "mvm clean install".

This should give you a project that builds and runs entirely from Maven.

Add to your pom.xml

 
    org.codehaus.mojo
    exec-maven-plugin
    1.2.1
  

And

  org.slf4j
  slf4j-simple
  1.7.2
  runtime

Try:

mvn -e exec:java -Dexec.mainClass="com.sample.DroolsTest"

It should produce:

...
[com.sample.DroolsTest.main()] INFO org.drools.compiler.kie.builder.impl.ClasspathKieProject - Found kmodule: file:/Users/davidbernard/Projects/action-deducing-diff/xx/target/classes/META-INF/kmodule.xml
[com.sample.DroolsTest.main()] INFO org.drools.compiler.kie.builder.impl.KieRepositoryImpl - KieModule was added:FileKieModule[ ReleaseId=x:x:1.0file=/Users/davidbernard/Projects/action-deducing-diff/xx/target/classes]
[com.sample.DroolsTest.main()] INFO org.drools.compiler.kie.builder.impl.ClasspathKieProject - Found kmodule: file:/Users/davidbernard/Projects/action-deducing-diff/xx/target/classes/META-INF/kmodule.xml
[com.sample.DroolsTest.main()] INFO org.drools.compiler.kie.builder.impl.KieRepositoryImpl - KieModule was added:FileKieModule[ ReleaseId=x:x:1.0file=/Users/davidbernard/Projects/action-deducing-diff/xx/target/classes]
Hello World
Goodbye cruel world
...

You should now also be able to run DroolsTest from eclipse.

You will have a rules->Sample.drl file and a kmodule.xml file.

The "ksession" name should match the code creating the ksession:

KieSession kSession = kContainer.newKieSession("ksession-rules");

The "packages" should match the directory the rule file is in.