/// <summary>
/// this is the callback from the queue
/// </summary>
/// <param name="queueData">the data item returned from the queue</param>
/// <param name="recieptHandle">the receipt handle of the data item</param>
/// <param name="sqsQueue">the queue that captured this message</param>
/// <returns>true to indicate we processed it, false to indicate it should remain in the queue</returns>
private bool QueueCallBack(SQSDemoQueueData queueData, string recieptHandle, SqsQueueDispatcher <SQSDemoQueueData> sqsQueue)
{
bool returnValue = false;
try
{
//to keep this real, we will randomize the delay periods, the effect is visible
//when MaxConcurrency is more than 1
int delayMod = _RandomDelay.Next(_QueueDelayInSeconds, _QueueDelayInSeconds * 5);
_SysLogger.LogInformation($"Working on message for {delayMod} seconds data: {queueData.RandomData}:{queueData.MoreRandomData}\r\n{recieptHandle}");
//Normally you would do work here, for our demo we just sleep a bit
Task waitForIt = Task.Delay(TimeSpan.FromSeconds(delayMod), _CancellationTokenSource.Token);
waitForIt.Wait();
if (!_CancellationTokenSource.IsCancellationRequested)
{
returnValue = true;
}
}
catch (OperationCanceledException)
{
_SysLogger.LogInformation($"Was cancelled for message {recieptHandle}");
returnValue = false;
}
catch (Exception badThing)
{
_SysLogger.LogError(badThing, $"A critical error occurred during the queue callback for message {recieptHandle}");
//the SqsQueueDispatcher handles this so throw it again
throw;
}
return(returnValue);
}
/// <summary>
/// simple method to enqueue items to the demo queue
/// </summary>
/// <param name="numItems"></param>
static void EnqueueMessages(int numItems)
{
var config = GetConfiguration();
string queueName = config.GetValue <string>("appSettings:QueueName");
Console.WriteLine($"Queueing {numItems} messages to {queueName}");
SqsQueueDispatcher <SQSDemoQueueData> sqsQueue = new SqsQueueDispatcher <SQSDemoQueueData>(queueName);
for (int count = 0; count < numItems; count++)
{
SQSDemoQueueData queueData = SQSDemoQueueData.RandomQueueData();
sqsQueue.EnqueueMessage(queueData);
}
Console.WriteLine($"Completed queueing {numItems} messages to {queueName}");
}
