TsgcWSPClient_AMQP1 › Events › OnAMQPMessageSentAck

OnAMQPMessageSentAck Event

Fires when the peer returns the Disposition frame that settles a previously sent message, reporting its terminal delivery state.

Syntax

property OnAMQPMessageSentAck: TsgcAMQP1MessageSentAckEvent;
// TsgcAMQP1MessageSentAckEvent = procedure(Sender: TObject; const aSession: TsgcAMQP1Session; const aLink: TsgcAMQP1SenderLink; const aMessageId: string; const aDeliveryState: TsgcAMQP1FrameDeliveryStates; const aDisposition: TsgcAMQP1FrameDisposition) of object

Default Value

—

Remarks

Raised when a disposition performative arrives from the broker for an earlier Transfer on a sender link. aDeliveryState is the terminal outcome the broker chose — Accepted, Rejected (with an error the application should log), Released or Modified — and aDisposition carries the raw delivery-id range it applies to, the Settled flag and the First / Last ids. For at-least-once reliability the application should treat a send as durable only after receiving this event with Accepted. Correlate via aMessageId with the earlier OnAMQPMessageSent.

Example

procedure TForm1.oAMQP1AMQPMessageSentAck(Sender: TObject;
  const aSession: TsgcAMQP1Session; const aLink: TsgcAMQP1SenderLink;
  const aMessageId: string;
  const aDeliveryState: TsgcAMQP1FrameDeliveryStates;
  const aDisposition: TsgcAMQP1FrameDisposition);
begin
  DoLog(Format('#AMQP1 ack id=%s state=%d',
    [aMessageId, Ord(aDeliveryState)]));
end;

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