At-least-once Delivery
In case of failures that lead to message loss or take too long to recover from, messages are retransmitted to assure they are delivered at least once.
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How can communication partners or a Message-oriented Middleware ensure that messages are received successfully? |
Context
Sometimes, message duplicity can be coped with by the application using a Message-oriented Middleware. Therefore, for scenarios where message duplicates are uncritical, it shall still be ensured that messages are received.
Solution
For each message retrieved by a receiver an acknowledgement is sent back to the message sender. In case this acknowledgement is not received after a certain time frame, the message is resend.
