///<summary>
///</summary>
///<param name="client"></param>
///<param name="symbol"></param>
///<exception cref="DataFeedException"></exception>
public void UnSubscribe(IDataFeedClient client, string symbol)
{
lock (_rtClients)
{
List <IDataFeedClient> symbolClients;
if (!_rtClients.TryGetValue(symbol, out symbolClients))
{
throw new DataFeedException("Attempt to unsubscribe from non-existent symbol: " + symbol);
}
int clientIndex = symbolClients.FindIndex(feedClient => feedClient.ClientId == client.ClientId);
if (clientIndex == -1)
{
throw new DataFeedException("Attept to unsubscribe non-existent client: " + client.ClientId);
}
symbolClients.RemoveAt(clientIndex);
Debug.Assert(symbolClients.Count(feedClient => feedClient.ClientId == client.ClientId) == 0);
//if symbol has no more clients, remove symbol subscription
if (symbolClients.Count == 0)
{
//make the real un-subscribe at data provider
UnSubscribeFromSymbol(symbol);
//remove from map
_rtClients.Remove(symbol);
}
}
}
///<summary>
///</summary>
///<param name="client"></param>
///<param name="symbol"></param>
public void Subscribe(IDataFeedClient client, string symbol)
{
lock (_rtClients)
{
List <IDataFeedClient> symbolClients;
if (!_rtClients.TryGetValue(symbol, out symbolClients))
{
//symbol wasn't subscribed yet, create an entry
_rtClients.Add(symbol, symbolClients = new List <IDataFeedClient>());
//make the real subscription
SubscribeToSymbol(symbol);
}
//add client to the client list
if (symbolClients.FindIndex(feedClient => feedClient.ClientId == client.ClientId) == -1)
{
symbolClients.Add(client);
}
}
}
