private async Task SendMessages()

in src/AWS.Logger.Core/Core/AWSLoggerCore.cs [407:445]
33 lines of code
5 McCabe index (conditional complexity)

        private async Task SendMessages(CancellationToken token)
        {
            try
            {
                //Make sure the log events are in the right order.
                _repo._request.LogEvents.Sort((ev1, ev2) => ev1.Timestamp.CompareTo(ev2.Timestamp));
                var response = await _client.PutLogEventsAsync(_repo._request, token).ConfigureAwait(false);
                _repo.Reset(response.NextSequenceToken);
                _requestCount = 5;
            }
            catch (InvalidSequenceTokenException ex)
            {
                //In case the NextSequenceToken is invalid for the last sent message, a new stream would be 
                //created for the said application.
                LogLibraryServiceError(ex);

                if (_requestCount > 0)
                {
                    _requestCount--;
                    var regexResult = invalid_sequence_token_regex.Match(ex.Message);
                    if (regexResult.Success)
                    {
                        _repo._request.SequenceToken = regexResult.Groups[1].Value;
                        await SendMessages(token).ConfigureAwait(false);
                    }
                }
                else
                {
                    _currentStreamName = await LogEventTransmissionSetup(token).ConfigureAwait(false);
                }
            }
            catch (ResourceNotFoundException ex)
            {
                // The specified log stream does not exist. Refresh or create new stream.
                LogLibraryServiceError(ex);

                _currentStreamName = await LogEventTransmissionSetup(token).ConfigureAwait(false);
            }
        }