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Chapter 9. Message delivery
9.1. Sending messages Copier lienLien copié sur presse-papiers!
To send a message, override the on_sendable event handler and call the sender::send() method. The sendable event fires when the proton::sender has enough credit to send at least one message.
Example: Sending messages
9.2. Tracking sent messages Copier lienLien copié sur presse-papiers!
When a message is sent, the sender can keep a reference to the tracker object representing the transfer. The receiver accepts or rejects each message that is delivered. The sender is notified of the outcome for each tracked delivery.
To monitor the outcome of a sent message, override the on_tracker_accept and on_tracker_reject event handlers and map the delivery state update to the tracker returned from send().
Example: Tracking sent messages
9.3. Receiving messages Copier lienLien copié sur presse-papiers!
To receive messages, create a receiver and override the on_message event handler.
Example: Receiving messages
9.4. Acknowledging received messages Copier lienLien copié sur presse-papiers!
To explicitly accept or reject a delivery, use the delivery::accept() or delivery::reject() methods in the on_message event handler.
Example: Acknowledging received messages
By default, if you do not explicity acknowledge a delivery, then the library accepts it after on_message returns. To disable this behavior, set the auto_accept receiver option to false.