In this chapter, we discussed the new features in EJB 3.0. We compared the EJB 3.0 features with EJB 2.0 features and discussed how EJB 3.0 is different from EJB 2.0. EJB 3.0 metadata annotations reduce the code required and make the deployment descriptors redundant. The local/remote and local home/home interfaces are not required in EJB 3.0 entity beans, and only a POJO class is required for an entity bean. The Java Persistence API provides an object-relational mapping model. Interceptors, simplified checked exceptions, and callback interfaces are some of the other new features in EJB 3.0.

In the next chapter, we shall convert an example EJB 2.x entity bean to an EJB 3.0 entity bean.