public void ReceiveReadyDot35Bug()
{
// In .NET 3.5, we saw an issue where ReceiveReady would be raised every second despite nothing being received
using (var server = new RouterSocket())
{
server.BindRandomPort("tcp://127.0.0.1");
server.ReceiveReady += (s, e) => Assert.Fail("Should not receive");
Assert.IsFalse(server.Poll(TimeSpan.FromMilliseconds(1500)));
}
}
static void Main(string[] args)
{
using (var context = NetMQContext.Create())
{
using (frontend = context.CreateRouterSocket())
{
using (backend = context.CreateRouterSocket())
{
// For Clients
Console.WriteLine("Q: Binding frontend {0}", FRONTEND_ENDPOINT);
frontend.Bind(FRONTEND_ENDPOINT);
// For Workers
Console.WriteLine("Q: Binding backend {0}", BACKEND_ENDPOINT);
backend.Bind(BACKEND_ENDPOINT);
// Logic of LRU loop
// - Poll backend always, frontend only if 1+ worker ready
// - If worker replies, queue worker as ready and forward reply
// to client if necessary
// - If client requests, pop next worker and send request to it
// Queue of available workers
workerQueue = new Queue <byte[]>();
// Handle worker activity on backend
backend.ReceiveReady += BackendOnReceiveReady;
frontend.ReceiveReady += FrontendOnReceiveReady;
while (true)
{
backend.Poll(TimeSpan.FromMilliseconds(500));
if (workerQueue.Count > 0)
{
frontend.Poll(TimeSpan.FromMilliseconds(500));
}
}
}
}
}
}
private static void Main()
{
using (var frontend = new RouterSocket())
using (var backend = new RouterSocket())
{
// For Clients
Console.WriteLine("Q: Binding frontend {0}", FrontendEndpoint);
frontend.Bind(FrontendEndpoint);
// For Workers
Console.WriteLine("Q: Binding backend {0}", BackendEndpoint);
backend.Bind(BackendEndpoint);
// Logic of LRU loop
// - Poll backend always, frontend only if 1+ worker ready
// - If worker replies, queue worker as ready and forward reply
// to client if necessary
// - If client requests, pop next worker and send request to it
// Queue of available workers
var workerQueue = new Queue<byte[]>();
// Handle worker activity on backend
backend.ReceiveReady += (s, e) =>
{
// Queue worker address for LRU routing
byte[] workerAddress = e.Socket.ReceiveFrameBytes();
// Use worker address for LRU routing
workerQueue.Enqueue(workerAddress);
// Second frame is empty
e.Socket.SkipFrame();
// Third frame is READY or else a client reply address
byte[] clientAddress = e.Socket.ReceiveFrameBytes();
// If client reply, send rest back to frontend
// Forward message to client if it's not a READY
if (Encoding.Unicode.GetString(clientAddress) != LRUReady)
{
e.Socket.SkipFrame(); // empty
byte[] reply = e.Socket.ReceiveFrameBytes();
frontend.SendMoreFrame(clientAddress);
frontend.SendMoreFrame("");
frontend.SendFrame(reply);
}
};
frontend.ReceiveReady += (s, e) =>
{
// Now get next client request, route to next worker
// Dequeue and drop the next worker address
// Now get next client request, route to LRU worker
// Client request is [address][empty][request]
byte[] clientAddr = e.Socket.ReceiveFrameBytes();
e.Socket.SkipFrame(); // empty
byte[] request = e.Socket.ReceiveFrameBytes();
try
{
byte[] deq = workerQueue.Dequeue();
backend.SendMoreFrame(deq);
backend.SendMoreFrame(Encoding.Unicode.GetBytes(""));
backend.SendMoreFrame(clientAddr);
backend.SendMoreFrame(Encoding.Unicode.GetBytes(""));
backend.SendFrame(request);
}
catch (Exception ex)
{
Console.WriteLine("Q: [FrontendOnReceiveReady] Dequeue exception: {0}", ex.ToString());
}
};
while (true)
{
backend.Poll(TimeSpan.FromMilliseconds(500));
if (workerQueue.Count > 0)
frontend.Poll(TimeSpan.FromMilliseconds(500));
}
}
}
static void Main(string[] args)
{
using (var context = NetMQContext.Create())
{
frontend = context.CreateRouterSocket();
backend = context.CreateRouterSocket();
// For Clients
Console.WriteLine("Q: Binding frontend {0}", FRONTEND_ENDPOINT);
frontend.Bind(FRONTEND_ENDPOINT);
// For Workers
Console.WriteLine("Q: Binding backend {0}", BACKEND_ENDPOINT);
backend.Bind(BACKEND_ENDPOINT);
// Logic of LRU loop
// - Poll backend always, frontend only if 1+ worker ready
// - If worker replies, queue worker as ready and forward reply
// to client if necessary
// - If client requests, pop next worker and send request to it
// Queue of available workers
workerQueue = new Queue<byte[]>();
// Handle worker activity on backend
backend.ReceiveReady += BackendOnReceiveReady;
frontend.ReceiveReady += FrontendOnReceiveReady;
while (true)
{
backend.Poll(TimeSpan.FromMilliseconds(500));
if (workerQueue.Count > 0)
frontend.Poll(TimeSpan.FromMilliseconds(500));
}
}
}
private static void Main()
{
using (var frontend = new RouterSocket())
using (var backend = new RouterSocket())
{
// For Clients
Console.WriteLine("Q: Binding frontend {0}", FrontendEndpoint);
frontend.Bind(FrontendEndpoint);
// For Workers
Console.WriteLine("Q: Binding backend {0}", BackendEndpoint);
backend.Bind(BackendEndpoint);
// Logic of LRU loop
// - Poll backend always, frontend only if 1+ worker ready
// - If worker replies, queue worker as ready and forward reply
// to client if necessary
// - If client requests, pop next worker and send request to it
// Queue of available workers
var workerQueue = new Queue <byte[]>();
// Handle worker activity on backend
backend.ReceiveReady += (s, e) =>
{
// Queue worker address for LRU routing
byte[] workerAddress = e.Socket.ReceiveFrameBytes();
// Use worker address for LRU routing
workerQueue.Enqueue(workerAddress);
// Second frame is empty
e.Socket.SkipFrame();
// Third frame is READY or else a client reply address
byte[] clientAddress = e.Socket.ReceiveFrameBytes();
// If client reply, send rest back to frontend
// Forward message to client if it's not a READY
if (Encoding.Unicode.GetString(clientAddress) != LRUReady)
{
e.Socket.SkipFrame(); // empty
byte[] reply = e.Socket.ReceiveFrameBytes();
frontend.SendMoreFrame(clientAddress);
frontend.SendMoreFrame("");
frontend.SendFrame(reply);
}
};
frontend.ReceiveReady += (s, e) =>
{
// Now get next client request, route to next worker
// Dequeue and drop the next worker address
// Now get next client request, route to LRU worker
// Client request is [address][empty][request]
byte[] clientAddr = e.Socket.ReceiveFrameBytes();
e.Socket.SkipFrame(); // empty
byte[] request = e.Socket.ReceiveFrameBytes();
try
{
byte[] deq = workerQueue.Dequeue();
backend.SendMoreFrame(deq);
backend.SendMoreFrame(Encoding.Unicode.GetBytes(""));
backend.SendMoreFrame(clientAddr);
backend.SendMoreFrame(Encoding.Unicode.GetBytes(""));
backend.SendFrame(request);
}
catch (Exception ex)
{
Console.WriteLine("Q: [FrontendOnReceiveReady] Dequeue exception: {0}", ex.ToString());
}
};
while (true)
{
backend.Poll(TimeSpan.FromMilliseconds(500));
if (workerQueue.Count > 0)
{
frontend.Poll(TimeSpan.FromMilliseconds(500));
}
}
}
}
