消息队列NetMQ使用介绍

1.前言

今天使用了下.NET平台的消息队列NetMQ,在这里记录下.博客园张善友也有较好的例子,只不过我这个例子在张兄的基础上稍微扩展了下.张兄的NetMQ介绍文章只是从客户端向服务端发送字符串，服务端收到后返回一个消息,我这里设想发送委托及参数到服务端执行，服务端返回执行状态.

2.下载NetMQ

Install-Package NetMQ

3.Demo

1）客户端

using NetMQ;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Runtime.Serialization;using System.Runtime.Serialization.Formatters.Binary;using System.Text;using System.Threading.Tasks;using NetMQ.Common;namespace NetMQClient{    class Program    {        static void Main(string[] args)        {            using (NetMQContext context = NetMQContext.Create())            {                Client(context);            }            Console.ReadKey();        }        static void Client(NetMQContext context)        {            using (NetMQSocket clientSocket = context.CreateRequestSocket())            {                clientSocket.Connect("tcp://127.0.0.1:5555");                Dictionary<string,object> dic = new Dictionary<string,object>();                dic.Add("a",1);                dic.Add("b",2);                Message msg = new Message()                {                    Id = 0,                    FunName = "Calc",                    Params = dic,                    Result = ""                };                byte[] buffer = ByteConvertHelper.Object2Bytes(msg);                clientSocket.SendFrame(buffer);                string answer = clientSocket.ReceiveFrameString();                Console.WriteLine("Answer from server: {0}", answer);            }        }    }}

2）服务端

using NetMQ;using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Runtime.Serialization;using System.Runtime.Serialization.Formatters.Binary;using System.Text;using System.Threading.Tasks;using NetMQ.Common;namespace NetMQDemo{    class Program    {        static void Main(string[] args)        {            using (NetMQContext context = NetMQContext.Create())            {                Server(context);            }            Console.ReadKey();        }        static int Calc(int a, int b)         {            return a + b;        }        static void Server(NetMQContext context)        {            using (NetMQSocket serverSocket = context.CreateResponseSocket())            {                serverSocket.Bind("tcp://127.0.0.1:5555");                byte[] buffer = serverSocket.ReceiveFrameBytes();                Message msg = (Message)ByteConvertHelper.Bytes2Object(buffer);                msg.Result = (Calc((int)msg.Params["a"],(int)msg.Params["b"]).ToString());                Console.WriteLine("Result:" + msg.Result);                serverSocket.SendFrame("Result:" + msg.Result);            }        }    }}

3）.Common

3.1）对象和字节数组互相转化的Helper

using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Runtime.Serialization;using System.Runtime.Serialization.Formatters.Binary;using System.Text;using System.Threading.Tasks;namespace NetMQ.Common{    public class ByteConvertHelper    {        /// <summary>        /// 将对象转换为byte数组        /// </summary>        /// <param name="obj">被转换对象</param>        /// <returns>转换后byte数组</returns>        public static byte[] Object2Bytes(object obj)        {            byte[] buff;            using (MemoryStream ms = new MemoryStream())            {                IFormatter iFormatter = new BinaryFormatter();                iFormatter.Serialize(ms, obj);                buff = ms.GetBuffer();            }            return buff;        }        /// <summary>        /// 将byte数组转换成对象        /// </summary>        /// <param name="buff">被转换byte数组</param>        /// <returns>转换完成后的对象</returns>        public static object Bytes2Object(byte[] buff)        {            object obj;            using (MemoryStream ms = new MemoryStream(buff))            {                IFormatter iFormatter = new BinaryFormatter();                obj = iFormatter.Deserialize(ms);            }            return obj;        }    }}

3.2）消息实体

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace NetMQ.Common{    [Serializable]    public class Message    {        public int Id { set; get; }        public string FunName { set; get; }        public Dictionary<string, object> Params { set; get; }        public string Result { set; get; }    }}

注意：必须加Serializable属性

4.结果

5.总结

NetMQ目前还不支持持久化消息，所以，可靠性不是特别高.消息队列基本的特性都满足，效率也很高.