Description of problem:

This issue relates to BRMS Integration with Fabric and more specifically to how Drools is loading KJARs from Maven.

In this case, drools does not use the fabric maven proxy or any of the configured maven repo's in fabric to load a KJAR. It uses 3 potential methods;

1) a drools CUSTOM_SETTINGS_PROPERTY pointing to a settings.xml
2) the 'userHome + "/.m2/settings.xml"'
3) the artifact is in 'userHome + "/.m2/repository"'

This is because the KJAR is loaded by KIE specific logic and not as bundle loaded through a feature or profile. Because fabric customers manage resources and configurations through the fabric, this represents additional configuration that is hard to track and maintain.

A KJAR is current loaded as follows;

1) InternalKieModule kieModule = (InternalKieModule) getRepository().getKieModule(releaseId);
https://github.com/droolsjbpm/drools/blob/6.3.x/drools-compiler/src/main/java/org/drools/compiler/kie/builder/impl/KieServicesImpl.java#L114

2) return getKieModule(releaseId, null);
https://github.com/droolsjbpm/drools/blob/6.3.x/drools-compiler/src/main/java/org/drools/compiler/kie/builder/impl/KieRepositoryImpl.java#L92

3) kieModule = loadKieModuleFromMavenRepo(releaseId, pomModel);
https://github.com/droolsjbpm/drools/blob/6.3.x/drools-compiler/src/main/java/org/drools/compiler/kie/builder/impl/KieRepositoryImpl.java#L105

4) return getInternalKieScanner().loadArtifact(releaseId, pomModel);
https://github.com/droolsjbpm/drools/blob/6.3.x/drools-compiler/src/main/java/org/drools/compiler/kie/builder/impl/KieRepositoryImpl.java#L129

5) return internalKieScanner; -> InternalKieScanner
https://github.com/droolsjbpm/drools/blob/6.3.x/drools-compiler/src/main/java/org/drools/compiler/kie/builder/impl/KieRepositoryImpl.java#L133

6) KieRepositoryScannerImpl implements InternalKieScanner
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/KieRepositoryScannerImpl.java

7) getArtifactResolver();
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/KieRepositoryScannerImpl.java#L118

8) mavenRepository = MavenRepository.getMavenRepository();
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/ArtifactResolver.java#L52

9) defaultMavenRepository = new MavenRepository( defaultAether );
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/MavenRepository.java#L78

10) remoteRepositoriesForRequest = initRemoteRepositoriesForRequest();
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/MavenRepository.java#L67

11) final MavenRepositoryConfiguration repositoryUtils = getMavenRepositoryConfiguration();
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/MavenRepository.java#L87

12) return MavenSettings.getMavenRepositoryConfiguration();
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/MavenRepository.java#L70

13) return SettingsHolder.mavenConf;
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/embedder/MavenSettings.java#L49

14) private static final MavenRepositoryConfiguration mavenConf = new MavenRepositoryConfiguration(settings);
https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/embedder/MavenSettings.java#L35

In terms of artifact resolution, everything happens based on the configured maven settings above in step 14.

For USER settings, it's looking for: private static File initUserSettingsFile()

1) CUSTOM_SETTINGS_PROPERTY
or
2) File userSettingsFile = new File( userHome + "/.m2/settings.xml" );

Otherwise it returns null.

Then it initializes settings: private static Settings initSettings(File userSettingsFile)

1) Is user settings wasn't null;
request.setUserSettingsFile( userSettingsFile );

2) Look for M2_HOME - set global settings
File globalSettingsFile = new File( mavenHome + "/conf/settings.xml" );

3) If user.home is set, sets the local repository:
settings.setLocalRepository( userHome + "/.m2/repository" );

Finlly;

15) All of the repos from the found settings are initialized:

this.extraRepositories = initExtraRepositories();
this.remoteRepositoriesForRequest = initRemoteRepositoriesForRequest();
this.artifactRepositoriesForRequest = initArtifactRepositories();

https://github.com/droolsjbpm/drools/blob/6.3.x/kie-ci/src/main/java/org/kie/scanner/MavenRepositoryConfiguration.java#L43

Version-Release number of selected component (if applicable):

BRMS 6.2.x
BRMS 6.3

How reproducible:

100%

Steps to Reproduce:
1. Deploy an application which loads a KJAR and only configure the maven repository or settings.xml in fabric.

Actual results:

KJAR artifact is unable to be found.

Expected results:

Should resolve and download the correct artifact.

Additional info:

In the customers eyes, in a fabric environment, drools should plug into fabric and leverage the already configured remote / local repositories configured within the environment.