public string AddUser(string UserName, string Balance, string jsonInput)
{
User user = null;
string message = string.Empty;
enumStatus status = enumStatus.Unknown;
double balance = 0.0;
try
{
if (!double.TryParse(Balance, out balance))
{
message = string.Format("Error: Invalid Balance: {0}", Balance);
}
if (!string.IsNullOrEmpty(jsonInput))
{
user = new User(jsonInput);
}
else
{
user = new User(UserName, balance);
}
if (MatchMeDB.Instance.UserTable.ContainsKey(user.UserName) || MatchMeDB.Instance.Users.ContainsKey(user.Id))
{
string existingUser = MatchMeDB.Instance.UserTable[user.UserName].ToString();
message = string.Format("Error: duplicate user. Existing User: {0} New User (rejected): {1}", existingUser, user.ToString());
}
if (string.IsNullOrEmpty(message))
{
status = MatchMeDB.Instance.AddUser(user);
if (status.Equals(enumStatus.UserAdded))
{
message = string.Format("User Added: {0}", user.ToString());
}
}
}
catch (Exception ex)
{
ServerLog.LogException(ex, string.Format("Add User: {0}", user.ToString()));
message = ex.Message;
status = enumStatus.UserAddFailed;
}
var result = new Dictionary <string, string> {
{ "status", status.ToString() },
{ "message", message }
};
return(JsonConvert.SerializeObject(result));
}
public void Start()
{
AppDomain.CurrentDomain.UnhandledException += (o, ea) =>
{
if (ea.ExceptionObject is Exception)
{
ServerLog.LogException(ea.ExceptionObject as Exception, "Unhandled exception handler called");
}
else
{
ServerLog.LogError("Unhandled exception handler called with unrecognized exception objhect");
}
};
ServerLog.LogInfo("Starting MatchMe Host");
listener.Start();
listener.BeginGetContext(OnContext, null);
}
private void ExceptionRespond(HttpListenerContext context, Exception e, int code, DateTime reqStartTime)
{
byte[] message = serverCharSet.GetBytes(
string.Format("An {0} exception was thrown.\n{1}\n{2}", e.GetType(), e.Message, e.StackTrace));
ServerLog.LogException(e, "An exception was thrown rendering URL " + context.Request.Url);
System.Threading.Interlocked.Add(ref totalBytesOut, message.Length);
if (code == 500)
{
System.Threading.Interlocked.Increment(ref total500s);
}
else if (code == 550)
{
System.Threading.Interlocked.Increment(ref total550s);
}
Respond(context, message, code, reqStartTime, "text/plain");
}
private void Respond(HttpListenerContext context, byte[] buffer, int returnCode, DateTime reqStartTime, string contentType = "text/plain")
{
int len = buffer != null ? buffer.Length : 0;
try
{
context.Response.AddHeader("Cache-Control", "no-cache");
context.Response.AddHeader("Content-Type", contentType);
context.Response.AddHeader("Access-Control-Allow-Origin", "*");
context.Response.ContentEncoding = serverCharSet;
context.Response.ContentLength64 = len;
context.Response.StatusCode = returnCode;
context.Response.OutputStream.Write(buffer, 0, len);
context.Response.ContentType = contentType;
ServerLog.LogHttpRequest(context.Request, returnCode, len, string.Empty, (int)((startTime - DateTime.Now).TotalMilliseconds));
System.Threading.Interlocked.Add(ref totalBytesOut, buffer.Length);
System.Threading.Interlocked.Increment(ref total200s);
}
catch (HttpListenerException hle)
{
ServerLog.LogException(hle, "Exception while returning data to http client");
}
}
private void OnContext(IAsyncResult ar)
{
DateTime reqStartTime = DateTime.Now;
HttpListenerContext context;
try
{
context = listener.EndGetContext(ar);
}
catch (HttpListenerException)
{
ServerLog.LogInfo("HttpListener has been shut down");
return;
}
if (!stopping)
{
listener.BeginGetContext(OnContext, null);
}
var processWebRequest = new Task(() =>
{
System.Threading.Interlocked.Increment(ref totalRequests);
byte[] json = null;
int httpStatus = 200;
string redirectUrl = null;
string outContentType = "application/json";
try
{
string processor;
string command;
string jsonInput;
string module;
string contentType;
string source;
string agent;
var args = ParseUrl(context.Request, out processor, out command, out jsonInput, out module, out contentType, out source, out agent);
if (module == "test")
{
if (processor == "util")
{
if (command == "stats")
{
StatRespond(context, reqStartTime);
}
else if (command == "health")
{
HealthRespond(context, reqStartTime);
}
else
{
throw new ApplicationException(string.Format("Unknown util command: {0}", command));
}
return;
}
}
else if (module == "action")
{
string jsonString = actionProcessor.Execute(command, args, jsonInput, contentType, source, agent, out outContentType, out redirectUrl, out httpStatus);
if (jsonString == null)
{
jsonString = "";
}
json = Encoding.UTF8.GetBytes(jsonString);
}
else if (module == "db")
{
string jsonString = dataProcessor.Execute(command, args, jsonInput, contentType, source, agent, out outContentType, out redirectUrl, out httpStatus);
if (jsonString == null)
{
jsonString = "";
}
json = Encoding.UTF8.GetBytes(jsonString);
}
else
{
throw new ApplicationException(string.Format("Unknown module: {0}", module));
}
}
catch (Exception e)
{
ExceptionRespond(context, e, 500, reqStartTime);
return;
}
if (redirectUrl != null)
{
RespondRedirect(context, redirectUrl);
}
else
{
Respond(context, json, httpStatus, reqStartTime, outContentType);
}
});
lock (runningTasks)
{
if (stopping)
{
Respond(context,
serverCharSet.GetBytes("MatchMe is shutting down.")
, 500, reqStartTime);
return;
}
runningTasks.Add(processWebRequest);
}
processWebRequest.ContinueWith(t =>
{
lock (runningTasks)
{
runningTasks.Remove(t);
}
if (t.IsFaulted)
{
ServerLog.LogException(t.Exception.InnerException, "Exception was unhandled in task");
}
});
processWebRequest.Start();
}
public string PlaceAnOrder(string UserName, string UserId, string Symbol, string Volume, string Price, string OrderType, string OrderSide)
{
User user = null;
string message = string.Empty;
string userId = MatchMeDB.Instance.UserTable[Config.AdminUser].Id;
enumStatus status = enumStatus.Unknown;
enumSide orderside = enumSide.Invalid;
enumOrderType ordertype = enumOrderType.Invalid;
double price = 0.0;
int volume = 0;
bool exist = false;
double requiredbalance = 0.0;
double remainbalance = 0.0;
string symbol = Symbol.ToUpper();
try
{
Symbol = Symbol.ToUpper();
if (!int.TryParse(Volume, out volume))
{
message = string.Format("Error: Invalid Volume: {0}", volume);
status = enumStatus.OrderPlaceError;
}
if (!status.Equals(enumStatus.OrderPlaceError) && !string.IsNullOrEmpty(symbol))
{
List <Order> companies = MatchMeDB.Instance.OrderTable.ContainsKey(userId) ? MatchMeDB.Instance.OrderTable[userId] : new List <Order>();
exist = companies.Where(a => a.Symbol.Equals(symbol)).Count() > 0;
if (!exist)
{
message = string.Format("Error: The Company does not exist {0}", symbol);
status = enumStatus.OrderPlaceError;
}
}
else
{
message = string.Format("Error: The Company does not exist {0}", symbol);
status = enumStatus.OrderPlaceError;
}
if (!status.Equals(enumStatus.OrderPlaceError) && !Enum.TryParse(OrderSide, true, out orderside))
{
message = string.Format("Error: Invalid Order Side: {0}", OrderSide);
status = enumStatus.OrderPlaceError;
}
if (!status.Equals(enumStatus.OrderPlaceError) && !Enum.TryParse(OrderType, true, out ordertype))
{
message = string.Format("Error: Invalid Order Type: {0}", OrderType);
status = enumStatus.OrderPlaceError;
}
if (!status.Equals(enumStatus.OrderPlaceError) && ordertype.Equals(enumOrderType.Market))
{
price = Exchange.Instance.GetMarketPrice(orderside, symbol, volume);
}
if (!status.Equals(enumStatus.OrderPlaceError) && ordertype.Equals(enumOrderType.Limit))
{
if (!double.TryParse(Price, out price))
{
message = string.Format("Error: Invalid Price: {0}", Price);
status = enumStatus.OrderPlaceError;
}
if (!status.Equals(enumStatus.OrderPlaceError) && orderside.Equals(enumSide.Sell))
{
price = (-1) * Math.Abs(price);
}
}
if (!status.Equals(enumStatus.OrderPlaceError) && !string.IsNullOrEmpty(UserName))
{
MatchMeDB.Instance.UserTable.TryGetValue(UserName, out user);
if (user == null)
{
message = string.Format("Error: Can't retrieve the User from the db via the keys. UserName{0}, UserId{1}", UserName, UserId);
status = enumStatus.OrderPlaceError;
}
}
if (!status.Equals(enumStatus.OrderPlaceError) && string.IsNullOrEmpty(message) && exist)
{
if (price > 0)
{
//price larger than zero means that it's a buy limit order or an order with valid market price
requiredbalance = price * volume + Config.Commission;
}
if (requiredbalance > user.Balance)
{
//check if balance is enough
remainbalance = requiredbalance - user.Balance;
message = string.Format("Error: No Enough Balance: Remain balance {0}, Requires {1} to place the order", user.Balance, remainbalance);
status = enumStatus.Rejected;
}
else
{
Order newOrder = new Order(symbol, volume, price, user.Id, ordertype, orderside);
if (orderside.Equals(enumSide.Sell))
{
status = Exchange.Instance.PlaceSell(newOrder);
if (status.Equals(enumStatus.Rejected))
{
message = string.Format("Error: Short Sell is not allowed. {0}", newOrder);
}
}
else if (orderside.Equals(enumSide.Buy))
{
status = Exchange.Instance.PlaceBuy(newOrder);
}
if (!status.Equals(enumStatus.OrderPlaceError) && string.IsNullOrEmpty(message))
{
message = "New Order Placed:" + MatchMeDB.Instance.Orders[newOrder.Id];
status = enumStatus.OrderPlaced;
}
}
}
}
catch (Exception ex)
{
ServerLog.LogException(ex, string.Format("Place Order Failed, User {0}, Symbol {1}", user.ToString(), Symbol));
message = ex.Message;
status = enumStatus.OrderPlaceError;
}
var result = new Dictionary <string, string> {
{ "status", status.ToString() }, { "message", message }
};
return(JsonConvert.SerializeObject(result));
}
public string AddCompany(string Symbol, string Volume, string Price)
{
if (!MatchMeDB.Instance.UserTable.ContainsKey(Config.AdminUser))
{
User user = new User(Config.AdminUser, 0.0);
MatchMeDB.Instance.AddUser(user);
}
string message = string.Empty;
double price = Config.DefaultPrice;
int volume = Config.DefaultVolume;
string userId = MatchMeDB.Instance.GetUserId(Config.AdminUser);
var status = enumStatus.Unknown;
enumOrderType ordertype;
enumSide orderside;
try
{
Symbol = Symbol.ToUpper();
if (string.IsNullOrEmpty(Price) || !double.TryParse(Price, out price))
{
ServerLog.LogInfo(message);
}
if (string.IsNullOrEmpty(message) && (string.IsNullOrEmpty(Volume) || !int.TryParse(Volume, out volume)))
{
ServerLog.LogInfo(message);
}
List <Order> companies = MatchMeDB.Instance.OrderTable.ContainsKey(userId) ? MatchMeDB.Instance.OrderTable[userId] : new List <Order>();
foreach (Order company in companies)
{
if (company.Symbol.Equals(Symbol))
{
message = string.Format("Error: duplicate company. Existing User: {0} New Company Symbol (rejected): {1}", company, Symbol);
status = enumStatus.CompanyAddFailed;
}
}
ordertype = enumOrderType.Market;
orderside = enumSide.Sell;
price = -Math.Abs(price);
Order newOrder = new Order(Symbol, volume, price, userId, ordertype, orderside);
if (string.IsNullOrEmpty(message) &&
Exchange.Instance.PlaceSell(newOrder, true).Equals(enumStatus.OrderPlaced))
{
Position position = MatchMeDB.Instance.GetPosition(userId, Symbol);
position.Quantity = volume;
MatchMeDB.Instance.UpdatePosition(position);
message = string.Format("Company Created: {0}, Volume: {1}, Price: {2}", newOrder.Symbol, newOrder.Volume, newOrder.Price);
status = enumStatus.CompanyAdded;
}
}
catch (Exception ex)
{
ServerLog.LogException(ex, string.Format("Add Company, Symbol {0}, Volume {1}, Price", Symbol, Volume, price.ToString()));
message = ex.Message;
status = enumStatus.CompanyAddFailed;
}
var result = new Dictionary <string, string> {
{ "status", status.ToString() },
{ "message", message }
};
return(JsonConvert.SerializeObject(result));
}
public string AdjustBalance(string UserName, string UserId, string AdjustAmount)
{
User user = null;
string message = string.Empty;
enumStatus status = enumStatus.Unknown;
double adjustAmount;
try
{
if (!double.TryParse(AdjustAmount, out adjustAmount))
{
message = string.Format("Error: Invalid adjustment: {0}", adjustAmount);
status = enumStatus.BalanceAdjustFailed;
}
if (!string.IsNullOrEmpty(UserName))
{
MatchMeDB.Instance.UserTable.TryGetValue(UserName, out user);
}
if (user == null && !string.IsNullOrEmpty(UserId))
{
string userDoc = string.Empty;
MatchMeDB.Instance.Users.TryGetValue(UserId, out userDoc);
if (userDoc != null)
{
user = new User(userDoc);
}
}
if (user == null)
{
message = string.Format("Error: Can't retrieve the User from the db via the keys. UserName{0}, UserId{1}", UserName, UserId);
status = enumStatus.BalanceAdjustFailed;
}
else
{
//We found the User in DB, so we update it!
user.Balance += adjustAmount;
if (user.Balance < 0)
{
message = string.Format("Error: Balance less than 0. UserName{0}, UserId{1}", UserName, user.Balance);
status = enumStatus.BalanceAdjustFailed;
}
status = MatchMeDB.Instance.UpdateUser(user);
if (status.Equals(enumStatus.BalanceAdjusted))
{
message = string.Format("Balance Adjusted. {0}", user.ToString());
}
}
}
catch (Exception ex)
{
ServerLog.LogException(ex, string.Format("Add User: {0}", user.ToString()));
message = ex.Message;
status = enumStatus.BalanceAdjustFailed;
}
var result = new Dictionary <string, string> {
{ "status", status.ToString() },
{ "message", message }
};
return(JsonConvert.SerializeObject(result));
}
