deliveryAttempt property
The approximate number of times that Pub/Sub has attempted to deliver the associated message to a subscriber.
More precisely, this is 1 + (number of NACKs) + (number of ack_deadline
exceeds) for this message. A NACK is any call to ModifyAckDeadline with a
0 deadline. An ack_deadline exceeds event is whenever a message is not
acknowledged within ack_deadline. Note that ack_deadline is initially
Subscription.ackDeadlineSeconds, but may get extended automatically by the
client library. Upon the first delivery of a given message,
delivery_attempt will have a value of 1. The value is calculated at best
effort and is approximate. If a DeadLetterPolicy is not set on the
subscription, this will be 0.
Optional.
Implementation
core.int? deliveryAttempt;