Websphere Message Queue Multithreaded

5
votes

We are backend processor and doing programming with JMS MQ. We have 2 queues. one is used to get message and another one is used to send message. All the banking users will put messages to Q1 through their IB, MB etc. We receive messages from Q1 and process it and we send message to Q2.

Currently we do not use multi threading for this. Can we able to use multi threading for this or single thread is enough to do this. because we are getting messages from Q1 one by one and process it.

Kindly revert back to me if question is not understandable. Please someone help me.

1
javajmsibm-mqmq

1 Answers

6
votes

Yes, JMS allows for multiple readers on the same queue. You can do this by multi-threading, multiple application instances, or a dispatch layer that fetches messages and then passes them to a handler through a callback or other mechanism.

The application must support that, however. For example, if two messages are related and must be processed in order, the order is not preserved if there is more than one listener on the queue. This is one reason why async messaging patterns strongly prefer messages not to have order dependencies or affinities.

If you use multi-threading, it is important to make sure to preserve transactionality. If multiple threads use the same connection and one issues a COMMIT then that commits all outstanding messages across all the threads sharing that connection.