/// <summary>
/// UnSubscribe message from the client.
/// </summary>
/// <param name="request">Object representing the requested information</param>
public virtual void UnSubscribe(RequestMessage request)
{
request.Header.MessageType = (int)MessageType.UNSUBSCRIBE;
IIPCDuplexCallback notUsed = null;
if (_subscriptions.ContainsKey(request.Header.ProcessID.ToString()))
{
_subscriptions.TryRemove(request.Header.ProcessID.ToString(), out notUsed);
}
}
/// <summary>
/// Subscribe message from the client.
/// </summary>
/// <param name="request">Object representing the requested information</param>
/// <remarks>
/// The client subscribes to the events from the server.
/// This may include client specific events or general broadcasts.
/// </remarks>
public virtual void Subscribe(RequestMessage request)
{
IIPCDuplexCallback callback = OperationContext.Current.GetCallbackChannel <IIPCDuplexCallback>();
request.Header.MessageType = (int)MessageType.SUBSCRIBE;
if (!_subscriptions.ContainsKey(request.Header.ProcessID.ToString()))
{
_subscriptions.TryAdd(request.Header.ProcessID.ToString(), callback);
}
}
/// <summary>
/// Send message from the client.
/// </summary>
/// <param name="request">Object representing the requested information</param>
/// <remarks>
/// This should be used either when you need a one way notification or an out of band reply.
/// </remarks>
public void Send(RequestMessage request)
{
IIPCDuplexCallback callback = OperationContext.Current.GetCallbackChannel <IIPCDuplexCallback>();
var response = Call(request);
if (callback != null)
{
callback.Reply(response);
}
}
/// <summary>
/// Broadcast a message to all clients.
/// </summary>
/// <param name="response">Response message</param>
/// <remarks>Only works with duplex clients</remarks>
public void Broadcast(ResponseMessage response)
{
IIPCDuplexCallback notUsed = null;
foreach (var replyChannel in _subscriptions)
{
try
{
replyChannel.Value.Reply(response);
}
catch (Exception ex)
{
Trace.WriteLine($"Reply to {response.Header.RequestHeader.ProcessID} failed with error: {ex.Message}");
_subscriptions.TryRemove(replyChannel.Key, out notUsed);
}
}
}
/// <summary>
/// Reply from the server to the client.
/// </summary>
/// <param name="clientID">Unique ID for the clients response channel.</param>
/// <param name="response">Response</param>
public void SendReply(string clientID, ResponseMessage response)
{
if (_subscriptions.ContainsKey(clientID))
{
var replyChannel = _subscriptions[clientID];
try
{
replyChannel.Reply(response);
}
catch (Exception ex)
{
Trace.WriteLine($"Reply to {response.Header.RequestHeader.ProcessID} failed with error: {ex.Message}");
IIPCDuplexCallback notUsed = null;
_subscriptions.TryRemove(clientID, out notUsed);
}
}
}
