private void EventLoop(NetMQSocket socket)
{
this.logger.LogDebug("Starting shell server event loop at {Address}.", socket);
while (alive)
{
try
{
// Start by pulling off the next <action>_request message
// from the client.
var nextMessage = socket.ReceiveMessage(context);
logger.LogDebug(
$"Received new message:\n" +
$"\t{JsonConvert.SerializeObject(nextMessage.Header)}\n" +
$"\t{JsonConvert.SerializeObject(nextMessage.ParentHeader)}\n" +
$"\t{JsonConvert.SerializeObject(nextMessage.Metadata)}\n" +
$"\t{JsonConvert.SerializeObject(nextMessage.Content)}"
);
// If this is our first message, we need to set the session
// id.
if (session == null)
{
session = nextMessage.Header.Session;
}
// Get a service that can handle the message type and
// dispatch.
switch (nextMessage.Header.MessageType)
{
case "kernel_info_request":
KernelInfoRequest?.Invoke(nextMessage);
break;
case "execute_request":
ExecuteRequest?.Invoke(nextMessage);
break;
case "shutdown_request":
ShutdownRequest?.Invoke(nextMessage);
break;
}
}
catch (ProtocolViolationException ex)
{
logger.LogCritical(ex, $"Protocol violation when trying to receive next ZeroMQ message.");
}
catch (ThreadInterruptedException)
{
if (alive)
{
continue;
}
else
{
return;
}
}
}
}
public ShellServer(
ILogger <ShellServer> logger,
IOptions <KernelContext> context,
IServiceProvider provider,
IShellRouter router
)
{
this.logger = logger;
this.context = context.Value;
this.provider = provider;
this.router = router;
router.RegisterHandler("kernel_info_request", message => KernelInfoRequest?.Invoke(message));
router.RegisterHandler("execute_request", message => ExecuteRequest?.Invoke(message));
router.RegisterHandler("shutdown_request", message => ShutdownRequest?.Invoke(message));
}
protected ActionResult ExecuteRequestAndHandle(ExecuteRequest executeRequest, int responseCode)
{
try
{
return(RestErrorHandler.Handle(() =>
{
Log.Info(string.Format("Entering {0} method", executeRequest.Method));
executeRequest.Invoke();
var response = this.StatusCode(responseCode);
Log.Info(string.Format("Leaving {0} method", executeRequest.Method));
return response;
}));
}
catch (Exception ex)
{
return(this.ProcessException(ex));
}
}