The EJB 3.0 specification makes programming much simpler. It makes the container do more work and the developers do less work. It decreases the number of programming artifacts for developers to provide, eliminates the requirement to implement ejb callback methods, and reduces the complexity of the entity bean programming model. EJB 3.0 should attract a larger developer community with this new programming model.
The EJB 3.0 specification provides the following advantages:
- Fewer number of classes and interfaces
- POJO/POJI-based components
- Deployment descriptors are optional
- JNDI lookups are no longer necessary
- Persistence API for lightweight persistence for OR mapping
- Interceptors
This article discusses possible migration strategies for moving applications written using EJB 2.x or earlier versions to the new EJB 3.0 programming model. With this in mind, this article discusses the changes in the new specification in the context of each of the different bean types. Also, this article is not very exhaustive in illustrating the migration options. Read Full Article>>
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