public async Task PullMessagesWithFlowControlAsync()
{
string topicId = $"testTopicForMessageWithFlowControlAck{_pubsubFixture.RandomName()}";
_pubsubFixture.CreateTopic(topicId);
// For this sample in particular, we need to retry the sbscription creation, the message publishing etc.
// That's because this sample is configuring the ack deadline of the subscriber, which will be extended
// automatically. While Pub/Sub has sent a message to a subscriber it will avoid sending it to another subscriber
// of the same subscription until the ack deadline has expired. Since we are renewing the ack deadline, it won't
// expire (soon) and if the message is sent but not acked, then Pub/Sub won't attempt to send the message
// to a different susbcriber even if we keep retrying, as it is waiting for the ack deadline to expire, which we
// keep extending.
await _pubsubFixture.Pull.Eventually(async() =>
{
string subscriptionId = $"testSubscriptionForMessageWithFlowControlAck{_pubsubFixture.RandomName()}";
_pubsubFixture.CreateSubscription(topicId, subscriptionId);
var message = _pubsubFixture.RandomName();
await _publishMessagesAsyncSample.PublishMessagesAsync(_pubsubFixture.ProjectId, topicId, new string[] { message });
// Pull and acknowledge the messages
var result = await _pullMessagesCustomAsyncSample.PullMessagesWithFlowControlAsync(_pubsubFixture.ProjectId, subscriptionId, true);
Assert.Equal(1, result);
//Pull the Message to confirm it's gone after it's acknowledged
result = await _pullMessagesCustomAsyncSample.PullMessagesWithFlowControlAsync(_pubsubFixture.ProjectId, subscriptionId, true);
Assert.Equal(0, result);
});
}
public async void AcknowledgeMessageWithFlowControl()
{
string topicId = "testTopicForMessageWithFlowControlAck" + _pubsubFixture.RandomName();
string subscriptionId = "testSubscriptionForMessageWithFlowControlAck" + _pubsubFixture.RandomName();
var message = _pubsubFixture.RandomName();
_pubsubFixture.CreateTopic(topicId);
_pubsubFixture.CreateSubscription(topicId, subscriptionId);
await _publishMessagesAsyncSample.PublishMessagesAsync(_pubsubFixture.ProjectId, topicId, new string[] { message });
// Pull and acknowledge the messages
var result = await _pullMessagesCustomAsyncSample.PullMessagesWithFlowControlAsync(_pubsubFixture.ProjectId, subscriptionId, true);
Assert.Equal(1, result);
//Pull the Message to confirm it's gone after it's acknowledged
result = await _pullMessagesCustomAsyncSample.PullMessagesWithFlowControlAsync(_pubsubFixture.ProjectId, subscriptionId, true);
Assert.True(result == 0);
}