Maven 3.0 is finally out after a long long time in progress!
Behind the scenes a LOT has changed, but for a Maven user or plugin developer you shouldn’t see many differences. Particularly, backwards compatibility was a must for this release.
New features include:
- Better POM validation and warning/error messages. Pay attention at the beginning of the build where you can see notices about your POM configuration.
- Parallel builds. Use several threads to build multiproject POMs, analyzing the dependencies between modules to determine the ordering.
- Stability and predictability, changes in classloading, dependency ordering and multiproject building make the build to behave more consistently.
- No more site plugin as you know it. Configure the new Maven Site plugin, or better, install Sonar (highly recommended).
- profiles.xml is no longer used
- Maven 1 repository layouts are no longer supported
Read all the release notes and compatibility notes.
- Download Maven 3.
- Check compatibility notes.
- Upgrade the plugins to compatible versions if needed.
- Configure the new Maven Site plugin, or move to Sonar.
See other notes on Maven 3 from Brett Porter, and if you are going to ApacheCON, he will be giving a training session covering Maven 3.0 too.
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