Interview Question: What is the difference between Message Driven Beans and Stateless Session beans?
By: Ash Viewed: 1380 times Printer Friendly Format
Question: What is the difference between Message Driven Beans and Stateless Session beans?
In several ways, the dynamic creation and allocation of message-driven bean instances mimics the behavior of stateless session EJB instances, which exist only for the duration of a particular method call.
However, message-driven beans are different from stateless session EJBs (and other types of EJBs) in several significant ways: Message-driven beans process multiple JMS messages asynchronously, rather than processing a serialized sequence of method calls.
Message-driven beans have no home or remote interface, and therefore cannot be directly accessed by internal or external clients. Clients interact with message-driven beans only indirectly, by sending a message to a JMS Queue or Topic. Only the container directly interacts with a message-driven bean by creating bean instances and passing JMS messages to those instances as necessary. The Container maintains the entire lifecycle of a message-driven bean; instances cannot be created or removed as a result of client requests or other API calls.
Most Viewed Articles (in Interview )
Latest Articles (in Interview)
Comment on this tutorial
- Cloud Computing
- Java Beans
- Mac OS X
- Office 365
- Tech Reviews