protected override int Execute(DateTime when)
{
int result;
PostAssetRequest load = SampleFactory.BuildLoad(when);
PostAssetRequest truckWithAlarm = SampleFactory.BuildTruckWithAlarm(load);
DateTime deadline = DateTime.Now + Timeout;
SessionFacade session1;
SessionFacade session2;
if (Account1FailsLogin(out session1) || Account2FailsLogin(out session2))
{
result = Result.Failure;
}
else
{
session1.DeleteAllAssets();
string alarmUrl = AlarmUrl.AbsoluteUri + "/";
session1.UpdateAlarm(alarmUrl);
session1.Post(truckWithAlarm);
// listener implements IDisposable to allow cleanup of HTTP ports
using (var listener = new Listener(AlarmUrl, deadline))
{
var cancellableWaitForAlarm = new CancellationTokenSource();
// task for getting the listener started
Task startListener = Task.Factory.StartNew(() => listener.Start());
// task for returning an HTTP request, if any
Task <HttpListenerRequest> receiveAlarm = startListener.ContinueWith(p => listener.GetRequest(),
cancellableWaitForAlarm.Token);
// if task completes before timeout, post a search that should trigger the alarm
if (startListener.Wait(Timeout))
{
if (startListener.IsCanceled)
{
Console.WriteLine("Background task canceled before listening began.");
return(Result.Failure);
}
if (startListener.IsFaulted)
{
Console.WriteLine("Background task faulted before listening began.");
return(Result.Failure);
}
if (!startListener.IsCompleted)
{
Console.WriteLine("Unspecified error with starting listener in background task.");
return(Result.Failure);
}
Console.WriteLine("Background task is listening for alarm.");
session2.Post(load);
}
else
{
Console.WriteLine("Background listener was not ready within {0}ms.", Timeout.TotalMilliseconds);
cancellableWaitForAlarm.Cancel();
return(Result.Failure);
}
// if receive an alarm before the timeout, print it to console
if (receiveAlarm.Wait(Timeout))
{
if (receiveAlarm.IsCanceled)
{
Console.WriteLine("Background task canceled before any alarm was received.");
return(Result.Failure);
}
if (receiveAlarm.IsFaulted)
{
Console.WriteLine("Background task faulted before any alarm was received.");
return(Result.Failure);
}
if (!receiveAlarm.IsCompleted)
{
Console.WriteLine("Unspecified error with listener awaiting alarm in background task.");
return(Result.Failure);
}
Console.WriteLine("Background task completed.");
HttpListenerRequest request = receiveAlarm.Result;
Console.WriteLine("HTTP requested host name and port: " + request.UserHostName);
Console.WriteLine("HTTP requested IP address and port: " + request.UserHostAddress);
Console.WriteLine("HTTP raw url: " + request.RawUrl);
Console.WriteLine("HTTP method: " + request.HttpMethod);
Console.WriteLine("HTTP content type: " + request.ContentType);
if (request.HasEntityBody)
{
Console.WriteLine("HTTP body: ");
using (var streamReader = new StreamReader(request.InputStream))
{
Console.WriteLine(streamReader.ReadToEnd());
}
}
Console.WriteLine("IP address and port of requester: " + request.RemoteEndPoint);
}
else
{
Console.WriteLine("Background task timed out after {0}ms.", Timeout.TotalMilliseconds);
return(Result.Failure);
}
}
result = Result.Success;
}
return(result);
}
