CODEWITHSUNDEEP
javatransactionsjms
Joq
Joq

Reputation: 3

Can I receive a message, prepare its response and send a message in a context of a single JMS transaction?

Studying to a exam I just found a question I can't answer either after looking in the web. The question is:

"Can a server receive a request using a JMS message, prepare its response (e.g access a database) and send the reply using again, JMS, i the scope of a single JMS transaction?"

I know we can send a transacted message or receive a message in the context of a transaction. I know we can group several message sends and receives in a single transaction protecting the whole interaction. However, JMS is designed to be asynchronous. So in theory I would need to have a transaction to send the message to the queue and a transaction to receive the message from the queue. Am I right or is it possible to have a SINGLE transaction for a send and receive?

Upvotes: 0

Views: 106

Answers (1)

Gergely Bacso
Gergely Bacso

Reputation: 14661

Yes, transacted receivers can be implemented in jMS. They are implemented by controlling the acknowledgemode of the communication: if all transactional operations are successful, the received message will be acknowledged to the broker, but in case of failure it does not happen, so the message can get redelivered.

This article explains this in more details:

Both message producers and message consumers may use transacted sessions. [...]

With message consumers, transacted sessions control message acknowledgment. The consumer can receive multiple messages just like the CLIENT_ACKNOWLEDGE mode. When the associated transaction is committed, the JMS implementation acknowledges all messages received in the associated transaction. If the transaction aborts, the JMS implementation returns the messages to the associated queue or topic.

Upvotes: 2

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