C#阿里雲視頻轉碼之消息接受

我們把視頻傳到阿里雲去轉碼，轉碼是否成功怎麼判斷呢，這裏就要用到阿里雲的消息服務了。

我的做法是新建一個服務程序，然後安裝到服務器上，這樣就能開機自啓，隨時隨地的接受消息， 另外我還給這個服務開啓一個wcf通信接口，這樣調一下這個，就能知道這個服務是否掛掉了。

首先還是要引用阿里雲的Aliyun.MNS.dll，引用好了開整。

using Aliyun.MNS;
using Aliyun.MNS.Model;
using Aliyun.MNS.Sample.Model;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Linq;
using System.ServiceModel;
using System.ServiceProcess;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace NiuRenVodMessage
{
    public partial class Service1 : ServiceBase
    {

        #region Private Properties
        private static string NiuRen = System.Configuration.ConfigurationManager.AppSettings["niuren"];   //數據庫連接字符串
        private static string _accessKeyId = System.Configuration.ConfigurationManager.AppSettings["accessKeyId"]; //阿里雲的accessKeyId
        private static string _secretAccessKey = System.Configuration.ConfigurationManager.AppSettings["secretAccessKey"]; //阿里雲的secretAccessKey
        private static string _endpoint = System.Configuration.ConfigurationManager.AppSettings["endpoint"]; //阿里雲消息服務的公網Endpoint
        private static string _folder = System.Configuration.ConfigurationManager.AppSettings["folder"]; //阿里雲存放的路徑
        private static string _queueName = System.Configuration.ConfigurationManager.AppSettings["queueName"]; //消息隊列的名稱

        private static HashSet<string> _secretHashSet = new HashSet<string>();
        public  static Thread myThread = new Thread(ReceiveMessage); //新開一個線程

        private static bool isExit = false;
        //private const string _queueNamePrefix = "my";
        private const int _receiveTimes = 1; //一條記錄
        // private const int _receiveInterval = 2;
        // private const int batchSize = 6;
        private static string _receiptHandle;

      static   ServiceHost serviceHost = new ServiceHost(typeof(Service2));

        #endregion

        public Service1()
        {
            InitializeComponent();
        }

        protected override void OnStart(string[] args)
        {
            Log4Net.Write("windows服務開始啓動");
            isExit = true;
            
            serviceHost.Open();
            IMNS client = new Aliyun.MNS.MNSClient(_accessKeyId, _secretAccessKey, _endpoint);
            
            myThread.Start(client);
        }

        protected override void OnStop()
        {
            Log4Net.Write("windows服務退出");
            isExit = false;
            serviceHost.Close();
            
        }

        public static void ReceiveMessage(object obj)
        {
            IMNS client = obj as IMNS;
            while (isExit)
            {


                try
                {
                    var nativeQueue = client.GetNativeQueue(_queueName);
                    for (int i = 0; i < _receiveTimes; i++)
                    {
                        var receiveMessageResponse = nativeQueue.ReceiveMessage();
                        Message message = receiveMessageResponse.Message;

                        byte[] bpath = Convert.FromBase64String(message.Body);
                        string str = Encoding.UTF8.GetString(bpath);
                        Result result = Newtonsoft.Json.JsonConvert.DeserializeObject<Result>(str);
                        string pahtstr = "\"Object\": \"" + _folder + "/";
                        if (result.MediaWorkflowExecution.Input.ToString().IndexOf(pahtstr) != -1)
                        {
                            int starSize = result.MediaWorkflowExecution.Input.ToString().IndexOf(pahtstr) + pahtstr.Length;
                            int endSize = result.MediaWorkflowExecution.Input.ToString().IndexOf(".");
                            result.MediaWorkflowExecution.InputFile = result.MediaWorkflowExecution.Input.ToString().Substring(starSize, endSize - starSize);
                        }
                        result.MediaWorkflowExecution.EndTime = message.EnqueueTime;
                        if (!_secretHashSet.Contains(result.MediaWorkflowExecution.InputFile))
                        {
                            string sql = string.Format("update  [Vod] set  [RunId]='{0}', EndTime = '{1}' where InputFileName = '{2}'", result.MediaWorkflowExecution.RunId, result.MediaWorkflowExecution.EndTime, result.MediaWorkflowExecution.InputFile);
                            SqlConnection connection = new SqlConnection(NiuRen);
                            SqlCommand command = new SqlCommand(sql, connection);
                            connection.Open();
                            int res = command.ExecuteNonQuery();
                            if (res > 0)
                            {
                                _secretHashSet.Add(result.MediaWorkflowExecution.InputFile);
                            }
                            connection.Close();
                            Log4Net.Write(string.Format("成功轉碼{0}條數據,文件名：{1}", res,result.MediaWorkflowExecution.InputFile));
                        }
                        _receiptHandle = message.ReceiptHandle;
                        //刪除消息
                        var deleteMessageResponse = nativeQueue.DeleteMessage(_receiptHandle);

                        Thread.Sleep(1000);
                    }
                }
                catch (Exception ex)
                {
                    Log4Net.Write("Receive message failed, exception info: " + ex.Message + ex.GetType().Name);
                    Thread.Sleep(60000);
                }
            }
        }
    }
}

Log4Net.Write這個是我自己寫的一個記錄文字輸出到txt的函數，這就不貼了，另外新開一個wcf通信接口隨時來觀察此服務是否掛掉的相關代碼也不貼了，就幾行代碼。
代碼寫的不好，獻醜了。