public void Unsubscribe(string categoryName, string counterName)
{
#if DEBUG
Console.WriteLine("Unsubscribe({0}, {1})", categoryName, counterName);
#endif
IPerfmonCallback callback = OperationContext.Current.GetCallbackChannel <IPerfmonCallback>();
RemoveCallback(categoryName, counterName, callback);
}
public void Leave()
{
#if DEBUG
MessageProperties properties = OperationContext.Current.IncomingMessageProperties;
var endpoint = (RemoteEndpointMessageProperty)properties[RemoteEndpointMessageProperty.Name];
Console.WriteLine("{0}:{1} has left", endpoint.Address, endpoint.Port);
#endif
IPerfmonCallback callback = OperationContext.Current.GetCallbackChannel <IPerfmonCallback>();
RemoveCallbacks(callback);
}
public void RemoveCallbacks(IPerfmonCallback callback)
{
foreach (var kvp in subscribers.ToList())
{
Tuple <string, string> tuple = kvp.Key;
List <IPerfmonCallback> list = kvp.Value;
list.Remove(callback);
if (!list.Any())
{
subscribers.Remove(tuple);
}
}
}
public void RemoveCallback(string categoryName, string counterName, IPerfmonCallback callback)
{
Tuple <string, string> tuple = Tuple.Create(categoryName, counterName);
List <IPerfmonCallback> list;
if (subscribers.TryGetValue(tuple, out list))
{
list.Remove(callback);
if (!list.Any())
{
subscribers.Remove(tuple);
}
}
}
public bool Subscribe(string categoryName, string counterName)
{
#if DEBUG
Console.WriteLine("Subscribe({0}, {1})", categoryName, counterName);
#endif
if (!allowedCategories.Contains(categoryName))
{
return(false);
}
try
{
if (!PerformanceCounterCategory.CounterExists(counterName, categoryName))
{
return(false);
}
}
catch (InvalidOperationException)
{
// Category does not exist
return(false);
}
IPerfmonCallback callback = OperationContext.Current.GetCallbackChannel <IPerfmonCallback>();
Tuple <string, string> tuple = Tuple.Create(categoryName, counterName);
List <IPerfmonCallback> list;
if (subscribers.TryGetValue(tuple, out list))
{
if (!list.Contains(callback))
{
list.Add(callback);
}
}
else
{
list = new List <IPerfmonCallback>()
{
callback
};
subscribers.Add(tuple, list);
}
return(true);
}
