TIBCO EMS STEP -2

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Ø  JMS supports these messaging models:
o   Point-to-Point (queues)
o   Publish and Subscribe (topics)
o   Multicast (topics)
Ø  Point-to-point messaging has one producer and one consumer per message. This style of messaging uses a queue to store messages until they are received. The message producer sends the message to the queue; the message consumer retrieves messages from the queue and sends acknowledgement that the message was received.
Ø  Exclusive queues are useful when you want only one application to receive messages for a specific queue.
Ø  Non-exclusive queues are useful for balancing the load of incoming messages across multiple receivers. Regardless of whether the queue is exclusive or not, only one consumer can ever consume each message that is placed on the queue.


Ø  Above pic point-to-point messaging using a non-exclusive queue. Each message consumer receives a message from the queue and acknowledges receipt of the message. The message is taken off the queue so that no other consumer can receive it.





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