There was an EJB 3 talk at the “licensee” day, which happens before JavaOne starts for everyone else.
As EJB 3 was discussed, some of the Geronimo team had their laptops out and were coding away. Were they working on getting code ready to preview EJB 3? No. They were adding support for Spring into the Geronimo core.
When you package components, you will be able to put a file, called something like spring.xml in META-INF. Geronimo will grok this, and be able to startup a Spring ApplicationContext and wrap the components and Spring container itself behind GBeans.
This becomes cool as Geronimo is supporting all of the J2EE specs. So, for example, now you will be able to hot deploy your Spring container/application. All of the management and deployment APIs are there for you. You will be able to access things via JMX if you want to.
I really like the path that Geronimo seems to be taking. They don’t say “we will only support [technology x]“. They support the various APIs, and we can make the choice. If you want to use JDO, go for it. If you want to use EJB 3, go for it. If you want to use Hibernate, etc etc.
Geronimo is going to give us freedom. I can’t wait.