Posted in: EJB Interview Questions with Answers
Session Bean
- Used for client interface
- Not shared between clients
- Two kinds of Session Bean:
- stateless - common object identity
- stateful - unique object identity
Entity Bean
- Maps to data in database or application
- Shared between clients
- Persistent state
- container managed - access defined at deployment
- bean managed - access defined as part of bean
Message Driven bean
- Allows applications to process messages asynchronously
- The messages may be sent by :
- An application client
- Another enterprise bean
- A Web component
- A JMS Client