private static void StartShellLoop(string shellAddress, string ioPubAddress)
{
ShellRouterSocket.Bind(shellAddress);
Log.Info($"Bound shell server to address {shellAddress}");
ShellPublisherSocket.Bind(ioPubAddress);
Log.Info($"Bound IO pub to address {ioPubAddress}");
while (!StopEvent.Wait(0))
{
var message = GetNextMessage();
Log.Info($"Received message {JsonSerializer.Serialize(message)}");
if (MessageHandlers.TryGetValue(message.Header.MessageType, out IShellMessageHandler handler))
{
Log.Info($"Sending message to {message.Header.MessageType} handler");
handler.HandleMessage(message, ShellRouterSocket, ShellPublisherSocket);
Log.Info("Message handling complete");
}
else
{
Log.Error($"No message handler found for message type {message.Header.MessageType}");
}
}
}
private static Message GetNextMessage()
{
var message = new Message();
// There may be additional ZMQ identities attached; read until the delimiter <IDS|MSG>"
// and store them in message.identifiers
// http://ipython.org/ipython-doc/dev/development/messaging.html#the-wire-protocol
var delimAsBytes = Encoding.ASCII.GetBytes(Constants.Delimiter);
while (true)
{
var delim = ShellRouterSocket.ReceiveFrameBytes();
if (delim.SequenceEqual(delimAsBytes))
{
break;
}
message.Identifiers.Add(delim);
}
// Getting Hmac
message.HMac = ShellRouterSocket.ReceiveFrameString();
Log.Info(message.HMac);
// Getting Header
var header = ShellRouterSocket.ReceiveFrameString();
Log.Info(header);
message.Header = JsonSerializer.Deserialize <Header>(header);
// Getting parent header
var parentHeader = ShellRouterSocket.ReceiveFrameString();
Log.Info(parentHeader);
message.ParentHeader = JsonSerializer.Deserialize <Header>(parentHeader);
// Getting metadata
var metadata = ShellRouterSocket.ReceiveFrameString();
Log.Info(metadata);
message.Metadata = JsonSerializer.Deserialize <Dictionary <string, object> >(metadata);
// Getting content
var content = ShellRouterSocket.ReceiveFrameString();
Log.Info(content);
message.Content = content;
return(message);
}
