Async/await example for Zyan Communication Framework

example.cs

// Compile this code using: csc example.cs /r:Zyan.Communication.dll
// First run — starts server.
// Second run — starts client.
 
using System;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Zyan.Communication;
using Zyan.Communication.Protocols.Tcp;
 
struct Program
{
	const int TcpPortNumber = 8765;
 
	const string ZyanHostName = "SampleService";
 
	static void Main()
	{
		try
		{
			RunServer();
		}
		catch // can't start two servers on the same port
		{
			RunClient().Wait();
		}
	}
 
// ------------------------------- Shared code --------
 
	public interface ISampleService
	{
		string GeneratePassword(int length);
	}
 
// ------------------------------- Client code --------
 
	static async Task RunClient()
	{
		var protocol = new TcpDuplexClientProtocolSetup();
		var url = protocol.FormatUrl("localhost", TcpPortNumber, ZyanHostName);
 
		using (var conn = await Task.Run(() => new ZyanConnection(url, protocol)))
		{
			Console.WriteLine("Connected to server.");
			var proxy = conn.CreateProxy<ISampleService>();
 
			while (true)
			{
				Console.Write("Enter password length (empty line to quit): ");
				var line = Console.ReadLine().Trim(' ', '\r', '\n', '.', '-');
				if (string.IsNullOrEmpty(line) || line.Any(c => !char.IsNumber(c)))
				{
					Console.WriteLine("Bye.");
					break;
				}
 
				var length = Convert.ToInt32(line);
				var password = await Task.Run(() => proxy.GeneratePassword(length));
 
				Console.WriteLine("Server generated password: {0}", password);
			}
		}
	}
 
// ------------------------------- Server code --------
 
	static void RunServer()
	{
		var protocol = new TcpDuplexServerProtocolSetup(TcpPortNumber);
 
		using (var host = new ZyanComponentHost(ZyanHostName, protocol))
		{
			host.RegisterComponent<ISampleService, SampleService>();
			Console.WriteLine("Server started. Press ENTER to quit.");
			Console.ReadLine();
		}
	}
 
	internal class SampleService : ISampleService
	{
		public string GeneratePassword(int length)
		{
			var sb = new StringBuilder();
			var rnd = new Random();
			for (var i = 0; i < length; i++)
			{
				var @char = (char)('a' + rnd.Next('z' - 'a'));
				sb.Append(@char);
			}
 
			Console.WriteLine("Generated password: {0}, length = {1}",
				sb, length);
 
			return sb.ToString();
		}
	}
}