/// <summary>
/// Gets a message from an SQS queue and if successful, deletes the message from the queue.
/// Safe method for multiple concurrent consumers of a single SQS because the initial message read makes the message unavailable to other callers.
/// </summary>
/// <param name="QueueUrl">The SQS queue URL</param>
/// <param name="bForceNoDelete">Debug option. Skips the message delete when testing reading messages from a live queue</param>
/// <returns>A dequeued SQS message or null if it fails.</returns>
public Message SQSDequeueMessage(string QueueUrl, bool bForceNoDelete)
{
if (!IsSQSValid)
{
return(null);
}
ReceiveMessageRequest ReceiveRequest = new ReceiveMessageRequest
{
QueueUrl = QueueUrl,
MaxNumberOfMessages = 1
};
ReceiveMessageResponse ReceiveResponse = SqsClient.ReceiveMessage(ReceiveRequest);
if (ReceiveResponse.Messages.Count == 1)
{
Message Message = ReceiveResponse.Messages[0];
if (Message != null && (bForceNoDelete || DeleteRecordSQS(QueueUrl, Message)))
{
return(Message);
}
}
return(null);
}
private bool DequeueRecordSQS(out string OutRecordString)
{
OutRecordString = string.Empty;
try
{
var ReceiveRequest = new ReceiveMessageRequest
{
QueueUrl = Config.Default.AWSSQSQueueUrl,
MaxNumberOfMessages = 1
};
var ReceiveResponse = SqsClient.ReceiveMessage(ReceiveRequest);
if (ReceiveResponse.Messages.Count == 1)
{
var Message = ReceiveResponse.Messages[0];
if (Message != null && TryDeleteRecordSQS(Message))
{
OutRecordString = Message.Body;
return(true);
}
}
}
catch (Exception Ex)
{
CrashReporterProcessServicer.WriteException("DequeueRecordSQS: " + Ex.ToString());
}
return(false);
}
public Message Receive(ReceiveMessageRequest request)
{
if (request == null)
{
return(null);
}
request.MaxNumberOfMessages = 1;
var response = SqsClient.ReceiveMessage(request);
return(response?.Messages.SingleOrDefault());
}
public IMessageContext <T> Receive(TimeSpan?timeout = null)
{
var receiveResponse = SqsClient.ReceiveMessage(new ReceiveMessageRequest {
QueueUrl = QueueUrl
});
var message = receiveResponse.Messages.FirstOrDefault();
if (message == null)
{
return(null);
}
return(new AwsSqsMessageContext <T>(this, Serializer.Deserialize(message.Body), message.ReceiptHandle));
}
public Message Receive(ReceiveMessageRequest request)
{
if (request == null)
{
return(null);
}
if (receiveBuffer.Count > 0 && receiveBuffer.TryDequeue(out var toReturn))
{
return(toReturn);
}
request.MaxNumberOfMessages = Math.Min(SqsQueueDefinition.MaxBatchReceiveItems, Math.Max(request.MaxNumberOfMessages, 1));
var response = SqsClient.ReceiveMessage(request);
return(BufferResponse(response));
}