Over at Sun’s Java site, there’s a lot of attention on Glassfish, in particular with it v3 release. The Glassfish v3 Technology Preview 2 gives an early look at what’s to come.

What is Glassfish? It’s a new application server for Jave Enterprise Edition platofmr, based on source code by Sun and Oracle’s TopLink Persistence system, which uses uses a relational database to store Java objects for persistence. Glassfish uses a derivative of Apache Tomcat as servlet container, but incorporates the Grizzly Java NIO (a collection of Java APIs for intensive I/O operations) for scalability and speed.