How 'messaging' supported in EJB 2.0 Specification?
Answer / guest
The EJB 2.0 Specification defines JMS support through a new
type of enterprise bean, the message-driven bean. A
message-driven bean is invoked by the EJB container as the
result of the arrival of a JMS message. To a client, the
message-driven bean is a JMS consumer that implements some
business logic on the server. Clients communicate with
message-driven beans by sending messages to a JMS
Destination (either a Queue or a Topic) for which the
message-driven bean is a MessageListener.
Message driven beans are distinct from both Entity and
Session beans. They have neither home nor remote interfaces.
Instead, they implement the javax.jms.MessageListener
interface.
Is This Answer Correct ? | 0 Yes | 0 No |
Enlist the enterprise beans types?
what is mean by com/Dcom ? Please answer me. Advance thanks.
What does statelessness mean?
Why is ejb used?
What is the advantage of using entity bean for database operations, over directly using jdbc api to do database operations? When would I use one over the other?
Define SessionContext ?
Explain the difference between, Java Class and Bean?
whatis the diff between ejb and servlet/jsp
What are the design goals of EJB architecture?
Define Clone?
In an EJB project, Howmany tables and How many entity beans are used?
List some key actors in persistence api.