作者: 林壽山

最近系統考量可靠性問題，在中間加上一層 Message Queue(MQ)的架構，採用的是目前最多人使用的RabbitMQ當作server服務。順便直接以百萬筆資料為單位塞入MQ來測試一下效能。

Producer程式

System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();//引用stopwatch物件
            sw.Reset();//碼表歸零
            sw.Start();//碼表開始計時
            //
            string queue = "info";
            try
            {
                var factory = new RabbitMQ.Client.ConnectionFactory();
                factory.HostName = "localhost";
                factory.UserName = "guest";
                factory.Password = "guest";

                using (var connection = factory.CreateConnection())
                {
                    using (var channel = connection.CreateModel())
                    {
                        bool durable = true;
                        channel.QueueDeclare(queue, durable, false, false, null);
                        RabbitMQ.Client.IBasicProperties properties = channel.CreateBasicProperties();
                        properties.DeliveryMode = 2;
                        for (int i = 1; i <= 100; i++)
                        {
                            LogInfo info = new LogInfo();
                            info.SYS_ID = "系統";
                            info.COMPANY_ID = "公司";
                            info.STORE_ID = "店別";
                            info.Content = "訊息";
                            string m1 = Newtonsoft.Json.JsonConvert.SerializeObject(info);
                            var body = Encoding.UTF8.GetBytes(m1);
                            channel.BasicPublish("", queue, properties, body);
                        }

                    }
                }
            }
            catch (System.Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            sw.Stop();
            string result1 = sw.Elapsed.TotalMilliseconds.ToString();
            Console.WriteLine("共花費:" + result1 + "毫秒");
            Console.ReadLine();

Consumer端程式

    string queue = "info";
            try
            {
                var factory = new ConnectionFactory();
                factory.HostName = "localhost";
                factory.UserName = "guest";
                factory.Password = "guest";
                var connection = factory.CreateConnection();
                var channel = connection.CreateModel();
                channel.QueueDeclare(queue, true, false, false, null); // 定義處理那一個queue
                channel.BasicQos(0, 1, false);  // 每次處理1則

                var consumer = new RabbitMQ.Client.Events.EventingBasicConsumer(channel); 
                // 定義收到queue的內容處理方式
                consumer.Received += (sender, e) =>
                {
                    byte[] body = e.Body.ToArray();
                    string message1 = Encoding.UTF8.GetString(body); 
                    LogInfo log = JsonConvert.DeserializeObject<LogInfo>(message1);  // 將queue中的json轉回物件
                    // 以下可以更改為自己要處理的事項
                    Console.WriteLine(log.DateTime.ToString("yyyy/MM/dd HH:mm:ss:FFF")+" "+log.Content );  // 先顯示畫面上
                    //
                    channel.BasicAck(e.DeliveryTag, false); // 處理完手動回應    

                };
                channel.BasicConsume(queue, false, consumer);  // 開始處理
                Console.ReadLine();
                connection.Close();
                channel.Close();
            }
            catch (System.Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }