public async Task PollAsync(CancellationToken cancellationToken)
{
var receiveMessageRequest = new ReceiveMessageRequest
{
MaxNumberOfMessages = 1,
MessageAttributeNames = { "All" },
QueueUrl = queuePollingOptions.QueueIdentifier,
VisibilityTimeout = queuePollingOptions.MessageVisibilityTimeoutInSeconds == 0
? 43200
: queuePollingOptions.MessageVisibilityTimeoutInSeconds,
WaitTimeSeconds = queuePollingOptions.PollingWaitTimeInSeconds
};
while (!cancellationToken.IsCancellationRequested)
{
try
{
logger.LogDebug($"Polling queue: {queuePollingOptions.QueueIdentifier}");
var receiveMessageResponse = await amazonSqs.ReceiveMessageAsync(receiveMessageRequest, cancellationToken);
foreach (var message in receiveMessageResponse.Messages)
{
var correlationId = GetCorrelationId(message);
using (logger.BeginScope(new Dictionary <string, object> {
[MessageAttributes.CorrelationId] = correlationId
}))
{
try
{
logger.LogDebug($"Despatching message: {message.MessageId}");
await messageDespatcher.DespatchAsync(correlationId, message);
logger.LogDebug($"Deleting message: {message.MessageId}");
await amazonSqs.DeleteMessageAsync(queuePollingOptions.QueueIdentifier, message.ReceiptHandle, cancellationToken);
}
catch (Exception exception)
{
await UnlockMessageAsync(message, cancellationToken);
logger.LogError(exception, $"Error while handling message: {message.MessageId}");
}
}
}
}
catch (Exception exception)
{
logger.LogError(exception, $"Error while polling queue: {queuePollingOptions.QueueIdentifier}");
}
}
}
protected override void Write(LogEventInfo logEvent)
{
if (_messageDespatcher == null)
{
throw new ArgumentNullException(nameof(_messageDespatcher));
}
if (logEvent?.LoggerName?.Equals("Amazon", StringComparison.InvariantCultureIgnoreCase) ?? false) //prevent an infinite loop
{
return;
}
var message = Layout.Render(logEvent);
_messageDespatcher.DespatchAsync(GetTopicArn(), message).ConfigureAwait(false).GetAwaiter().GetResult();
}