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ZeroMQ C# library

clrzmq4 is a .NET wrapper around the native ZeroMQ/libzmq library, and provides the ZeroMQ namespace.

It is written in C# 5.0, and can be opened and built using Visual Studio 2012+ and MonoDevelop 5+.

It is built as AnyCPU to run on .NET Framework 4.0+ and mono 5+, and can currently load native shared libraries for i386 and amd64 on Windows, GNU/Linux and Mac OS X.

The pre-built nuget.org/packages/ZeroMQ/ includes native shared libraries for Windows (libzmq 4.1.n) and GNU/Linux (libzmq 4.1.n), for Windows i386 and linux/MacOSX x86_64 architectures.

You can place any native shared library or dynamic link libraries into a folder ~/Downloads/clrzmq4/amd64 or ~/Downloads/clrzmq4/i386, any libzmq.dll/.so/.dylib 3.x 4.x will work, important is just that the file name is libzmq.dll.

    sudo apt-get install libzmq3-dev

Get it

Open it

  • using MonoDevelop or Visual Studio
  • using Texteditor gedit or GNU emacs

Run it

  • You can't run ZeroMQ/clrzmq4 directly, because this is a library.
  • using mono framework:
msbuild clrzmq4.mono.sln /p:Configuration=Release
mono bin/Release/ZGuideExamples.exe Espresso
  • using dotnet framwork
nuget restore clrzmq4.netcore.sln
dotnet msbuild clrzmq4.netcore.sln
dotnet run --project ZGuideExamples/ZGuideExamples.netcore.csproj Espresso

Read ZeroMQ - The Guide

Ask questions on stackoverflow using tags C# ZeroMQ !

HWClient Example

public static void HWClient(string[] args)
{
	//
	// Hello World client
	//
	// Author: metadings
	//

	// Create
	// using (var context = new ZContext())
	using (var requester = new ZSocket(ZSocketType.REQ))
	{
		// Connect
		requester.Connect("tcp://127.0.0.1:5555");

		for (int n = 0; n < 10; ++n)
		{
			string requestText = "Hello";
			Console.Write("Sending {0}...", requestText);

			// Send
			requester.Send(new ZFrame(requestText));

			// Receive
			using (ZFrame reply = requester.ReceiveFrame())
			{
				Console.WriteLine(" Received: {0} {1}!", requestText, reply.ReadString());
			}
		}
	}
}

HWServer Example

public static void HWServer(string[] args)
{
	//
	// Hello World server
	//
	// Author: metadings
	//

	if (args == null || args.Length < 1)
	{
		Console.WriteLine();
		Console.WriteLine("Usage: ./{0} HWServer [Name]", AppDomain.CurrentDomain.FriendlyName);
		Console.WriteLine();
		Console.WriteLine("    Name   Your name. Default: World");
		Console.WriteLine();
		args = new string[] { "World" };
	}

	string name = args[0];

	// Create
	// using (var context = new ZContext())
	using (var responder = new ZSocket(ZSocketType.REP))
	{
		// Bind
		responder.Bind("tcp://*:5555");

		while (true)
		{
			// Receive
			using (ZFrame request = responder.ReceiveFrame())
			{
				Console.WriteLine("Received {0}", request.ReadString());

				// Do some work
				Thread.Sleep(1);

				// Send
				responder.Send(new ZFrame(name));
			}
		}
	}
}

WUClient Example

public static void WUClient(string[] args)
{
	//
	// Weather update client
	// Connects SUB socket to tcp://localhost:5556
	// Collects weather updates and finds avg temp in zipcode
	//
	// Author: metadings
	//

	if (args == null || args.Length < 2)
	{
		Console.WriteLine();
		Console.WriteLine("Usage: ./{0} WUClient [ZipCode] [Endpoint]", AppDomain.CurrentDomain.FriendlyName);
		Console.WriteLine();
		Console.WriteLine("    ZipCode   The zip code to subscribe. Default is 72622 Nürtingen");
		Console.WriteLine("    Endpoint  Where WUClient should connect to.");
		Console.WriteLine("              Default is tcp://127.0.0.1:5556");
		Console.WriteLine();
		if (args.Length < 1)
			args = new string[] { "72622", "tcp://127.0.0.1:5556" };
		else
			args = new string[] { args[0], "tcp://127.0.0.1:5556" };
	}

	// Socket to talk to server
	// using (var context = new ZContext())
	using (var subscriber = new ZSocket(ZSocketType.SUB))
	{
		string connect_to = args[1];
		Console.WriteLine("I: Connecting to {0}...", connect_to);
		subscriber.Connect(connect_to);

		// Subscribe to zipcode
		string zipCode = args[0];
		Console.WriteLine("I: Subscribing to zip code {0}...", zipCode);
		subscriber.Subscribe(zipCode);

		// Process 10 updates
		int i = 0;
		long total_temperature = 0;
		for (; i < 20; ++i)
		{
			using (var replyFrame = subscriber.ReceiveFrame())
			{
				string reply = replyFrame.ReadString();

				Console.WriteLine(reply);
				total_temperature += Convert.ToInt64(reply.Split(' ')[1]);
			}
		}
		Console.WriteLine("Average temperature for zipcode '{0}' was {1}°", zipCode, (total_temperature / i));
	}
}

WUServer Example

public static void WUServer(string[] args)
{
	//
	// Weather update server
	// Binds PUB socket to tcp://*:5556
	// Publishes random weather updates
	//
	// Author: metadings
	//

	// Prepare our (context and) publisher
	// using (var context = new ZContext())
	using (var publisher = new ZSocket(ZSocketType.PUB))
	{
		string address = "tcp://*:5556";
		Console.WriteLine("I: Publisher.Bind'ing on {0}", address);
		publisher.Bind(address);

		// Initialize random number generator
		var rnd = new Random();

		while (true)
		{
			// Get values that will fool the boss
			int zipcode = rnd.Next(99999);
			int temperature = rnd.Next(-55, +45);

			// Send message to all subscribers
			var update = string.Format("{0:D5} {1}", zipcode, temperature);
			using (var updateFrame = new ZFrame(update))
			{
				publisher.Send(updateFrame);
			}
		}
	}
}

Also look into the WUProxy Example.

Learn more: ZeroMQ - The Guide and the Examples in C#

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ZeroMQ C# namespace (.NET and mono, Windows, Linux and MacOSX, x86 and amd64)

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