Global Sync Context for Maven Resolver

Note: This component has been deprecated and superseded in 1.7.0 with the name mapper static.

The Global Sync Context Factory is Java global lock factory for Maven Resolver to provide a concurrent-safe access from a single Maven instance to the same local Maven repository.

For further details about the factory read the Javadoc.

Open Issues/Notes

It only works when dependency injection is used and not the bundled AetherModule or ServiceLocator (Maven uses dependency injection).
Usage from plugins has not been tested yet.
The furnace-maven-plugin does not work this implementation because it uses ServiceLocator instead of dependency injection.

Installation/Testing

Copy the following dependencies from Maven Central to ${maven.home}/lib/ext/:

  ├── javax.annotation-api-1.3.2.jar
  └── maven-resolver-synccontext-global-1.6.3.jar

Now start a multithreaded Maven build on your project.

Debugging

Add/modify the following entries in ${maven.conf}/logging/simplelogger.properties:

org.slf4j.simpleLogger.showDateTime=true
org.slf4j.simpleLogger.showThreadName=true
org.slf4j.simpleLogger.showShortLogName=true
org.slf4j.simpleLogger.log.org.eclipse.aether.synccontext=trace

Now start a multithreaded Maven build on your project and you should see at least these lines:

4626 [main] [TRACE] GlobalSyncContextFactory$GlobalSyncContext - Acquiring global...
35318 [main] [TRACE] GlobalSyncContextFactory$GlobalSyncContext - Releasing global...