public static void Init()
{
var host = CloudConfigurationManager.GetSetting(Endpoint.AddressStringName);
var auth = CloudConfigurationManager.GetSetting(Endpoint.AuthenticationStringName);
using (var wc = new WebClient())
{
wc.Headers.Add(Endpoint.AuthenticationHeader, auth);
var endpoint = string.Format("http://{0}/api/node", host);
var data = wc.DownloadString(endpoint);
var destinations = JsonConvert.DeserializeObject <IEnumerable <DestinationsUpdate> >(data).ToArray();
if (!destinations.Any())
{
throw new NotImplementedException("No destinations received from worker");
}
foreach (var dest in destinations)
{
DestinationsCache.Set(dest.Flight, dest);
}
}
}
public static void Init(HttpContext httpContext)
{
//throw new NotImplementedException();
Trace.TraceInformation("-----------> REMOVE THIS !!!! DEBUG ONLY");
//var data = File.ReadAllText(httpContext.Server.MapPath("~/App_Data/DestinationsData.json"));
var data = "[{\"Flight\": \"1\",\"Destination\": \"1\",\"Url\": \"http://blazedsp.com\"},{\"Flight\": \"1\",\"Destination\": \"3\",\"Url\": \"http://bing.com\"},{\"Flight\": \"2\",\"Destination\": \"1\",\"Url\": \"http://blazedsp.com\"}]";
var destinations = JsonConvert.DeserializeObject <IEnumerable <DestinationsUpdate> >(data).ToArray();
foreach (var dest in destinations)
{
DestinationsCache.Set(dest.Flight, dest);
}
}
//private static readonly string FilePath = string.Format("{0}{1}", RoleEnvironment.GetLocalResource(LocalStorage.StorageName).RootPath, LocalStorage.LockName);
//private readonly CloudBlockBlob _blockBlob;
//public MvcApplication()
//{
// var storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("Node.Storage.ConnectionString"));
// var blobClient = storageAccount.CreateCloudBlobClient();
// var container = blobClient.GetContainerReference("node");
// container.CreateIfNotExists();
// _blockBlob = container.GetBlockBlobReference(string.Format("offline.{0}.lock", RoleEnvironment.CurrentRoleInstance.Id.GetHash()));
//}
protected void Application_Start()
{
Trace.TraceInformation("Application_Start");
// TODO: [Optimization]
ServicePointManager.DefaultConnectionLimit = 12;
// Initalize ProtoBuf
ProtoBufConfig.Init();
// Register Filters
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
// Register Routes
RouteConfig.RegisterRoutes(RouteTable.Routes);
// Get Destination Data & Populate Cache
try
{
#if DEBUG
SetupConfig.Init(HttpContext.Current);
#else
SetupConfig.Init();
#endif
}
catch (Exception ex)
{
Trace.TraceError("SetupConfig Exception");
// This will catch a misconfigured Worker Endpoint and inform of Faulted
ServiceBusSingleton.Instance.SendCommandAsync(new Command {
Type = Commands.Faulted
}).Wait();
return;
}
#region ServiceBusSingleton
// Init Updates callback
ServiceBusSingleton.Instance.OnUpdateMessage(message =>
{
try
{
// Process message from subscription
var update = message.GetBody <Update>(_xpsUpdate);
if (update.Destination != null)
{
// TODO: Clean this
foreach (var flight in MemoryCache.Default)
{
var item = flight.Value as WeightedSelector <DestinationsUpdate>;
if (item == null)
{
continue;
}
foreach (var dest in item.ListByWeightAscending().Where(a => a.Value.Destination == update.Destination.ToString()))
{
item.Remove(dest);
item.Add(new DestinationsUpdate
{
Flight = update.Flight != null ? update.Flight.ToString() : dest.Value.Flight,
Destination = update.Destination.ToString(),
Url = update.Url
}, 1);
}
}
}
else if (update.Flight != null)
{
var flights = DestinationsCache.Get(update.Flight);
// TODO: There currently is no way to select and update a single entry in WeightedSelector
foreach (var flight in flights.ListByWeightAscending().Where(flight => flight.Value.Destination == update.Destination.ToString()))
{
flights.Remove(flight);
flights.Add(new DestinationsUpdate
{
Flight = update.Flight.ToString(),
Destination = update.Destination != null ? update.Destination.ToString() : flight.Value.Destination,
Url = update.Url
}, 1);
}
}
// ReSharper disable RedundantIfElseBlock
else
{
// TODO: If the entry isn't in the cache then what? Request fresh data from Worker?
}
// ReSharper restore RedundantIfElseBlock
// Remove message from subscription
message.Complete();
}
catch (Exception)
{
// TODO: Log error & dead letter message
// Indicates a problem, unlock message in subscription
message.Abandon();
}
});
// Inform Worker its online (used later for monitoring Nodes)
// TODO: Add Instance ID
ServiceBusSingleton.Instance.SendCommandAsync(new Command {
Type = Commands.Online
}).Wait();
#endregion
// Set Node online
//if (!_blockBlob.DeleteIfExists())
//{
// throw new NotImplementedException();
//}
//File.Delete(FilePath);
}
public async Task <ActionResult> Index()
{
// Flight
var flight = Request.QueryString.Get(QueryStrings.FlightId);
if (string.IsNullOrWhiteSpace(flight))
{
// TODO: Log the error and redirect to a default catch all address (value should be setup in Frontend config)
throw new NotImplementedException("'flight' is NULL");
}
// User ID
var userId = Request.Cookies.Get(Cookies.UserId);
var uid = userId != null ? userId.Value : Guid.NewGuid().ToString();
// Destination List
var destinations = DestinationsCache.Get(flight);
if (destinations == null)
{
// TODO: Log the error and request update for Flight ID
throw new NotImplementedException("'destinations' is NULL");
}
// Select Destination (Weighted)
var destination = destinations.Select();
// NOTE: .NET v4.5.2 (currently not supported on Azure)
// TODO: There needs to be a fallback if the node can't connect to the Service Bus (eg. MSMQ)
//HostingEnvironment.QueueBackgroundWorkItem(ct => ServiceBusSingleton.Instance.SendEventAsync(new Event
//{
// Time = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
// UserId = uid,
// UserAgent = Request.UserAgent,
// UserHostAddress = Request.UserHostAddress,
// UserProxyAddress = Request.Headers.Get("X-FORWARDED-FOR"),
// Flight = flight,
// Destination = destination.Destination
//}));
// TODO: There needs to be a fallback if the node can't connect to the Service Bus (eg. MSMQ)
await ServiceBusSingleton.Instance.SendEventAsync(new Event
{
Type = EventType.AdvertClick,
Time = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
UserId = uid,
UserAgent = Request.UserAgent,
UserLanguage = Request.Headers.Get("Accept-Language"),
UserHostAddress = Request.UserHostAddress,
UserProxyAddress = Request.Headers.Get("X-FORWARDED-FOR"),
Referer = Request.UrlReferrer == null ? null : Request.UrlReferrer.AbsoluteUri,
Flight = flight,
Destination = destination.Destination
}).ConfigureAwait(true);
// TODO: Fix this for cross domain issues
Response.AppendCookie(new HttpCookie(Cookies.UserId, uid)
{
//Domain = "",
Expires = DateTime.UtcNow.AddYears(2)
});
#if DEBUG || RELEASE_DEMO
var debugMode = Request.QueryString.Get(QueryStrings.DebugMode);
if (!string.IsNullOrWhiteSpace(debugMode))
{
return(View(destination));
}
#endif
// Redirect to URL
return(Redirect(destination.Url));
}
