public void Send_CorrectInputWithLogging_ShouldReturnCorrectReply()
{
const string hostAddress = "tcp://localhost:5555";
var loggingMessages = new List<string>();
// setup the counter socket for communication
using (var context = NetMQContext.Create())
using (var broker = context.CreateRouterSocket())
using (var poller = new Poller())
using (var session = new MDPClient(hostAddress))
{
broker.Bind(hostAddress);
// we need to pick up any message in order to avoid errors
broker.ReceiveReady += (s, e) =>
{
var msg = e.Socket.ReceiveMessage();
// we expect to receive a 4 Frame message
// [client adrR][e][mdp header][service][request]
if (msg.FrameCount != 5)
Assert.Fail("Message with wrong count of frames {0}", msg.FrameCount);
// REQUEST socket will strip the his address + empty frame
// ROUTER has to add the address prelude in order to identify the correct socket(!)
// [client adr][e][mdp header][service][reply]
var request = msg.Last.ConvertToString(); // get the request string
msg.RemoveFrame(msg.Last); // remove the request frame
msg.Append(new NetMQFrame(request + " OK")); // append the reply frame
e.Socket.SendMessage(msg);
};
poller.AddSocket(broker);
Task.Factory.StartNew(poller.PollTillCancelled);
// set the event handler to receive the logging messages
session.LogInfoReady += (s, e) => loggingMessages.Add(e.Info);
// well formed message
var requestMessage = new NetMQMessage(new[] { new NetMQFrame("REQUEST") });
// correct call
var reply = session.Send("echo", requestMessage);
poller.CancelAndJoin();
poller.RemoveSocket(broker);
Assert.That(reply.FrameCount, Is.EqualTo(1));
Assert.That(reply.First.ConvertToString(), Is.EqualTo("REQUEST OK"));
Assert.That(loggingMessages.Count, Is.EqualTo(3));
Assert.That(loggingMessages[0], Is.EqualTo("[CLIENT] connecting to broker at tcp://localhost:5555"));
Assert.That(loggingMessages[1].Contains("[CLIENT INFO] sending"), Is.True);
Assert.That(loggingMessages[2].Contains("[CLIENT INFO] received"), Is.True);
}
}
/// <summary>
/// usage: MDPServiceDiscoveryClientExample [-v]
///
/// implements a MDPClient API usage with Service Discovery
/// </summary>
private static void Main (string[] args)
{
const string service_to_lookup = "echo";
const string service_discovery = "mmi.service";
var verbose = args.Length == 1 && args[0] == "-v";
var id = Encoding.ASCII.GetBytes ("SDC01");
// give WORKER & BROKER time to settle
Thread.Sleep (250);
using (var session = new MDPClient ("tcp://localhost:5555", id))
{
if (verbose)
session.LogInfoReady += (s, e) => Console.WriteLine ("{0}", e.Info);
var request = new NetMQMessage ();
// set the service name
request.Push (service_to_lookup);
// send the request to service discovery
var reply = session.Send (service_discovery, request);
if (reply != null && !reply.IsEmpty)
{
var answer = reply.First.ConvertToString ();
Console.WriteLine ("Lookup {0} service returned: {1}/{2}", service_to_lookup, answer, reply);
}
else
Console.WriteLine ("ERROR: no response from broker, seems like broker is NOT running!");
}
Console.Write ("Exit with any key.");
Console.ReadKey ();
}
/// <summary>
/// usage: MDPClientExample [-v] [-rn] (1 ;lt n ;lt 100000 / Default == 10)
///
/// implements a MDPClient API usage
/// </summary>
private static void Main (string[] args)
{
if (args.Length == 1 || args.Length > 2)
{
if (!(args[0] == "-v" || args[0].Contains ("-r")))
{
Console.WriteLine ("MDPClientExample [-v(erbose) OR -h(elp)]");
Console.WriteLine ("\t-v => verbose");
Console.WriteLine ("\tto stop processing use CTRL+C");
return;
}
}
const string service_name = "echo";
const int max_runs = 100000;
bool verbose = false;
int runs = 10;
if (args.Length >= 1)
{
if (args.Length == 1 && args[0] == "-v")
verbose = true;
else if (args.Length == 2)
verbose = args[0] == "-v" || args[1] == "-v";
if (args[0].Contains ("-r") || args.Length > 1)
{
if (args[0].Contains ("-r"))
runs = GetInt (args[0]);
else if (args[1].Contains ("-r"))
runs = GetInt (args[1]);
}
}
runs = runs == -1 ? 10 : runs > max_runs ? max_runs : runs;
var id = new[] { (byte) 'C', (byte) '1' };
var watch = new Stopwatch ();
Console.WriteLine ("Starting MDPClient and will send {0} requests to service <{1}>.", runs, service_name);
Console.WriteLine("(writes '.' for every 100 and '|' for every 1000 requests)\n");
try
{
// create MDP client and set verboseness && use automatic disposal
using (var session = new MDPClient ("tcp://localhost:5555", id))
{
if (verbose)
session.LogInfoReady += (s, e) => Console.WriteLine ("{0}", e.Info);
// just give everything time to settle in
Thread.Sleep (500);
watch.Start ();
for (int count = 0; count < runs; count++)
{
var request = new NetMQMessage ();
// set the request data
request.Push ("Helo World!");
// send the request to the service
var reply = session.Send (service_name, request);
if (ReferenceEquals (reply, null))
break;
if (count % 1000 == 0)
Console.Write ("|");
else
if (count % 100 == 0)
Console.Write (".");
}
watch.Stop ();
}
}
catch (Exception ex)
{
Console.WriteLine ("ERROR:");
Console.WriteLine (ex.Message);
Console.WriteLine (ex.StackTrace);
return;
}
var time = watch.Elapsed;
Console.WriteLine ("{0} request/replies in {1} ms processed! Took {2:N3} ms per REQ/REP",
runs,
time.TotalMilliseconds,
time.TotalMilliseconds / runs);
Console.Write ("\nExit with any key!");
Console.ReadKey ();
}
public void Send_NoServiceNameWithLogging_ShouldThrowApplicationException()
{
const string hostAddress = "tcp://localhost:5555";
var loggingMessages = new List<string>();
// setup the counter socket for communication
using (var session = new MDPClient(hostAddress))
{
// set the event handler to receive the logging messages
session.LogInfoReady += (s, e) => loggingMessages.Add(e.Info);
// well formed message
var requestMessage = new NetMQMessage(new[] { new NetMQFrame("REQUEST") });
// correct call
try
{
session.Send(string.Empty, requestMessage);
}
catch (ApplicationException ex)
{
Assert.That(ex.Message, Is.EqualTo("serviceName must not be empty or null."));
}
Assert.That(loggingMessages.Count, Is.EqualTo(0));
}
}
public void Send_WrongHeaderFromBrokerNoLogging_ShouldThrowApplicationException()
{
const string hostAddress = "tcp://localhost:5555";
// setup the counter socket for communication
using (var broker = new RouterSocket())
using (var poller = new NetMQPoller())
using (var session = new MDPClient(hostAddress))
{
broker.Bind(hostAddress);
// we need to pick up any message in order to avoid errors
broker.ReceiveReady += (s, e) =>
{
// return empty reply
var msg = e.Socket.ReceiveMultipartMessage();
// we expect to receive a 4 Frame message
// [REQ ADR][EMPTY]["MDPC01"]["echo"]["REQUEST"]
if (msg.FrameCount != 5)
Assert.Fail("Message with wrong count of frames {0}", msg.FrameCount);
// REQUEST socket will strip the his address + empty frame
// ROUTER has to add the address prelude in order to identify the correct socket(!)
// [REQ ADR][EMPTY]["MDPC00"]["echo"]["REQUEST"]
var clientAddress = msg.Pop();
msg.Pop(); // forget empty frame
var mdpVersion = msg.Pop();
msg.Pop(); // drop service name version
msg.Push("NoService");
msg.Push(mdpVersion);
msg.Push(NetMQFrame.Empty);
msg.Push(clientAddress); // reinsert the client's address
e.Socket.SendMultipartMessage(msg);
};
poller.Add(broker);
poller.RunAsync();
// well formed message
var requestMessage = new NetMQMessage(new[] { new NetMQFrame("REQUEST") });
try
{
session.Send("echo", requestMessage);
}
catch (ApplicationException ex)
{
Assert.That(ex.Message, Is.EqualTo("[CLIENT INFO] answered by wrong service: NoService"));
}
}
}
public void Send_EmptyReplyFromBrokerWithLogging_ShouldThrowApplicationException()
{
const string hostAddress = "tcp://localhost:5555";
var loggingMessages = new List<string>();
// setup the counter socket for communication
using (var broker = new RouterSocket())
using (var poller = new NetMQPoller())
using (var session = new MDPClient(hostAddress))
{
broker.Bind(hostAddress);
// we need to pick up any message in order to avoid errors
broker.ReceiveReady += (s, e) =>
{
// return empty reply
var msg = e.Socket.ReceiveMultipartMessage();
// we expect to receive a 4 Frame message
// [REQ ADR][EMPTY]["MDPC01"]["echo"]["REQUEST"]
if (msg.FrameCount != 5)
Assert.Fail("Message with wrong count of frames {0}", msg.FrameCount);
// REQUEST socket will strip the his address + empty frame
// ROUTER has to add the address prelude in order to identify the correct socket(!)
// [REQ ADR][EMPTY]["MDPC01"]["echo"]["REQUEST"]
e.Socket.SendMultipartMessage(msg);
};
poller.Add(broker);
poller.RunAsync();
// set the event handler to receive the logging messages
session.LogInfoReady += (s, e) => loggingMessages.Add(e.Info);
// well formed message
var requestMessage = new NetMQMessage(new[] { new NetMQFrame("REQUEST") });
// correct call
session.Send("echo", requestMessage);
poller.Stop();
Assert.That(loggingMessages.Count, Is.EqualTo(3));
Assert.That(loggingMessages[0], Is.EqualTo("[CLIENT] connecting to broker at tcp://localhost:5555"));
Assert.That(loggingMessages[1].Contains("[CLIENT INFO] sending"), Is.True);
Assert.That(loggingMessages[2].Contains("[CLIENT INFO] received"), Is.True);
}
}
public void Send_WrongServiceNameWithLogging_ShouldLogPermanentError()
{
const string hostAddress = "tcp://localhost:5555";
var loggingMessages = new List<string>();
// setup the counter socket for communication
using (var broker = new RouterSocket())
using (var poller = new NetMQPoller())
using (var session = new MDPClient(hostAddress))
{
broker.Bind(hostAddress);
// we need to pick up any message in order to avoid errors
broker.ReceiveReady += (s, e) =>
{
// just swallow message -> wrong service name
e.Socket.ReceiveMultipartMessage();
};
poller.Add(broker);
poller.RunAsync();
// set the event handler to receive the logging messages
session.LogInfoReady += (s, e) => loggingMessages.Add(e.Info);
// well formed message
var requestMessage = new NetMQMessage(new[] { new NetMQFrame("REQUEST") });
// wrong service name
session.Send("xyz", requestMessage);
poller.Stop();
Assert.That(loggingMessages.Count, Is.EqualTo(7));
Assert.That(loggingMessages[6], Is.EqualTo("[CLIENT ERROR] permanent error, abandoning!"));
}
}
public void Send_WrongMDPVersionFromBrokerNoLogging_ShouldThrowApplicationException()
{
const string hostAddress = "tcp://localhost:5555";
// setup the counter socket for communication
using (var context = NetMQContext.Create())
using (var broker = context.CreateRouterSocket())
using (var poller = new Poller())
using (var session = new MDPClient(hostAddress))
{
broker.Bind(hostAddress);
// we need to pick up any message in order to avoid errors
broker.ReceiveReady += (s, e) =>
{
// return empty reply
var msg = e.Socket.ReceiveMessage();
// we expect to receive a 4 Frame message
// [REQ ADR][EMPTY]["MDPC01"]["echo"]["REQUEST"]
if (msg.FrameCount != 5)
Assert.Fail("Message with wrong count of frames {0}", msg.FrameCount);
// REQUEST socket will strip the his address + empty frame
// ROUTER has to add the address prelude in order to identify the correct socket(!)
// [REQ ADR][EMPTY]["MDPC00"]["echo"]["REQUEST"]
var clientAddress = msg.Pop();
msg.Pop(); // forget empty frame
msg.Pop(); // drop the MDP Version Frame
msg.Push("MDPC00"); // insert wrong MDP version
msg.Push(NetMQFrame.Empty);
msg.Push(clientAddress); // reinsert the client's address
e.Socket.SendMessage(msg);
};
poller.AddSocket(broker);
Task.Factory.StartNew(poller.PollTillCancelled);
// well formed message
var requestMessage = new NetMQMessage(new[] { new NetMQFrame("REQUEST") });
try
{
session.Send("echo", requestMessage);
}
catch (ApplicationException ex)
{
Assert.That(ex.Message, Is.StringContaining("MDP Version mismatch"));
}
poller.CancelAndJoin();
poller.RemoveSocket(broker);
}
}