Resin 3.1.x is a development branch. New capabilities will be added along with bug fixes for future versions of the Resin 3.1.x branch.
Deployments which need a Resin version with only bug fixes should use the Resin 3.0.x branch.
The Resin JSF implementation has cleaned up tremendously in 3.1.5. The jsf-12.jar is included in the resin/plugin directory. To enable Resin-JSF, just move the .jar file into the resin/lib directory. Resin-JSF aims to be high performance, based on its tight integration with Resin's JSP and use of Hessian as a serialization protocol.
Quercus has continued to steadily fix bugs and implement PHP functions. The 3.1.5 release includes a major focus on the Wordpress and MediaWiki killer apps by going through both with a fine toothed comb and fixing bugs as they've been found.
Resin now includes an embedding facade to simplify integration with IDEs and testing harnesses. The embedded API includes test-support methods to simplify and speed-up automated testing.
Resin's remoting capability has been refactored to include a simple driver API. Protocol factories return a servlet to marshal protocol requests and responses.
The applications still use the servlet configuration to expose their services as HTTP requests. The protocols are now selected with an easy to remember uri scheme like "hessian:", "cxf:" or "xfire:".
The configuration for Resin's messaging (JMS) support has been reworked
significantly. JMS queues can now use the
Message listeners (beans) and JCA endpoint support has been reworked significantly as well. JCA is now significantly easier to configure.
Resin's EJB 3.0 support has been significantly refactored. Both EJB and IoC use the same underlying code to implement transaction aspects, interception, and lifecycle events.
Resin-IoC and framework integration
The 3.1.5 release integrates Resin IoC with several component frameworks, letting you use Resin's dependency injection with objects created in the framework.
Maven 2 repository
The Resin 3.1 releases are now available in a Maven2 repository at http://caucho.com/m2. Snapshots are available at http://caucho.com/m2-snapshot. Details and information on the resin-maven-plugin capabilityes (resin:run and resin:jspc) are at wiki: Resin and Maven2.
Resin ant tasks are now available in the resin/plugins/resin-ant.jar class. Information is available in wiki: Resin and Ant.