/// <summary>
/// Forwards requests from the frontend socket to the backend socket.
/// </summary>
protected override bool FrontendHandler(ZSocket sock, out ZMessage message, out ZError error)
{
error = default(ZError);
message = null;
// receiving scope
// STREAM: get 2 frames, identity and body
ZMessage incoming = null;
// IPAddress address = null;
string address;
if (!ReceiveMsg(sock, ref incoming, out address, out error))
{
return(false);
}
// sending scope
// DEALER: forward
using (incoming)
{
if (incoming[1].Length == 0)
{
return(true); // Ignore the Empty one
}
// Prepend empty delimiter between Identity frame and Data frame
incoming.Insert(1, new ZFrame());
// Prepend Peer-Address
incoming.Insert(2, new ZFrame(address));
try
{
if (!BackendSocket.Send(incoming, /* ZSocketFlags.DontWait, */ out error))
{
return(false);
}
}
finally {
incoming.Dismiss();
}
}
return(true);
}
protected override void FrontendHandler(object sender, NetMQSocketEventArgs args)
{
bool more;
do
{
var data = args.Socket.Receive(out more);
if (more)
{
BackendSocket.SendMore(data);
}
else
{
BackendSocket.Send(data);
}
} while (more);
}
/// <summary>
/// This override of FrontendHandler receives data from the socket contained within args,
/// and Sends it to BackendSocket.
/// </summary>
/// <param name="sender">unused</param>
/// <param name="args">a NetMQSocketEventArgs that contains a Socket for receiving data from</param>
protected override void FrontendHandler(object sender, NetMQSocketEventArgs args)
{
// TODO reuse a Msg instance here for performance
bool more;
do
{
var data = args.Socket.ReceiveFrameBytes(out more);
if (more)
{
BackendSocket.SendMoreFrame(data);
}
else
{
BackendSocket.SendFrame(data);
}
} while (more);
}
/// <summary>
/// Forwards replies from the backend socket to the frontend socket.
/// </summary>
protected override bool BackendHandler(ZSocket args, out ZMessage message, out ZError error)
{
return(BackendSocket.Forward(FrontendSocket, out message, out error));
}
/// <summary>
/// Forwards replies from the backend socket to the frontend socket.
/// </summary>
/// <param name="args">A <see cref="SocketEventArgs"/> object containing the poll event args.</param>
protected override void BackendHandler(SocketEventArgs args)
{
BackendSocket.Forward(FrontendSocket);
}
