private void SubscribeMessages(QueueName requestQueueName, ref int processedMessages, CancellationToken token)
{
IQueueingService queueingService = CreateProvider();
processedMessages = 0;
while (true)
{
// process request messages
using (Claim claim = queueingService.ClaimMessage(requestQueueName, null, TimeSpan.FromMinutes(1), TimeSpan.FromMinutes(1)))
{
List <QueuedMessage> messagesToDelete = new List <QueuedMessage>();
foreach (QueuedMessage queuedMessage in claim.Messages)
{
if (token.IsCancellationRequested)
{
return;
}
CalculatorOperation operation = queuedMessage.Body.ToObject <CalculatorOperation>();
CalculatorResult result;
switch (operation._command)
{
case "+":
result = new CalculatorResult(operation, operation._operand1 + operation._operand2);
break;
case "-":
result = new CalculatorResult(operation, operation._operand1 - operation._operand2);
break;
case "*":
result = new CalculatorResult(operation, operation._operand1 * operation._operand2);
break;
case "/":
result = new CalculatorResult(operation, operation._operand1 / operation._operand2);
break;
default:
throw new InvalidOperationException();
}
messagesToDelete.Add(queuedMessage);
queueingService.PostMessages(operation._replyQueueName, new Message <CalculatorResult>(TimeSpan.FromMinutes(5), result));
processedMessages++;
}
if (messagesToDelete.Count > 0)
{
queueingService.DeleteMessages(requestQueueName, messagesToDelete.Select(i => i.Id));
}
}
if (token.IsCancellationRequested)
{
return;
}
}
}
