private async Task Handler()
{
while (this.IsRunning)
{
try
{
using (var socket = new DealerSocket())
using (this.BackendBuffer = new NetMQQueue <TransportMessage>())
using (var poller = new NetMQPoller()
{
socket, this.BackendBuffer
})
using (var monitor = new NetMQ.Monitoring.NetMQMonitor(socket, $"inproc://monitor.forwarderdevice.backend.{Guid.NewGuid().ToString()}", SocketEvents.Connected | SocketEvents.Disconnected))
{
socket.Options.Identity = System.Text.Encoding.ASCII.GetBytes(Guid.NewGuid().ToString().Replace("-", "").ToLowerInvariant());
socket.ReceiveReady += (sender, e) =>
{
try
{
var netmqMessage = new NetMQMessage();
if (e.Socket.TryReceiveMultipartMessage(ref netmqMessage))
{
var message = netmqMessage.ToMessage();
this.ForwarderDevice.OnBackendReceived(message);
this.ForwarderDevice.frontendBuffer.Enqueue(message);
}
}
catch (Exception ex)
{
this.ForwarderDevice.OnDiagnosticMessage(ex.Message + ": " + ex.StackTrace);
}
};
this.BackendBuffer.ReceiveReady += (sender, e) =>
{
try
{
while (this.BackendBuffer.TryDequeue(out TransportMessage message, TimeSpan.Zero))
{
this.ForwarderDevice.OnFrontendForwarded(message);
this.ForwarderDevice.OnDiagnosticMessage("Forwarding message to " + this.Endpoint.ToConnectionString());
if (!socket.TrySendMultipartMessage(TimeSpan.FromSeconds(1), message.ToNetMQMessage()))
{
this.ForwarderDevice.OnDiagnosticMessage("Failed to send message");
}
}
}
catch (Exception ex)
{
this.ForwarderDevice.OnDiagnosticMessage(ex.Message + ": " + ex.StackTrace);
}
};
monitor.Connected += (sender, e) =>
{
this.ForwarderDevice.OnDiagnosticMessage($"Dealer socket conntected to {this.Endpoint.ToConnectionString()}");
this.IsConnected = true;
};
monitor.Disconnected += (sender, e) =>
{
this.ForwarderDevice.OnDiagnosticMessage($"Dealer socket disconntected from {this.Endpoint.ToConnectionString()}");
this.IsConnected = false;
};
this.ForwarderDevice.OnDiagnosticMessage($"Attempting to connect to {this.Endpoint.ToConnectionString()}");
monitor.StartAsync();
monitor.AttachToPoller(poller);
var pollerTask = new Task(poller.Run);
pollerTask.ContinueWith((Task task) =>
{
var ex = task.Exception;
this.ForwarderDevice.OnDiagnosticMessage(ex.Message + ": " + ex.StackTrace);
this.IsConnected = false;
}, TaskContinuationOptions.OnlyOnFaulted);
pollerTask.Start();
socket.Connect(this.Endpoint.ToConnectionString());
var start = DateTime.Now;
while (!this.IsConnected)
{
if ((DateTime.Now - start).TotalMilliseconds > 5000)
{
throw new Exception($"Connection timeout [{this.ServiceName}]");
}
await Task.Delay(1000);
}
while (this.IsConnected && this.IsRunning)
{
await Task.Delay(1000);
}
this.ForwarderDevice.OnDiagnosticMessage("Closing dealer socket...");
poller.StopAsync();
socket.Disconnect(this.Endpoint.ToConnectionString());
monitor.DetachFromPoller();
monitor.Stop();
this.IsConnected = false;
}
if (this.IsRunning)
{
await Task.Delay(1000);
}
}
catch (Exception ex)
{
this.ForwarderDevice.OnDiagnosticMessage(ex.Message + ": " + ex.StackTrace);
}
}
}
