/// <summary>
     /// fanout类型交换机，发送消息
     /// </summary>
     public class RabbitMqFanoutSendHelper : RabbitMqHelper {
         /// <summary>
         /// 发送消息
         /// </summary>
         /// <param name="msg"></param>
         /// <returns></returns>
         public bool SendMsg(string msg)
         {
             try
             {
                 using (var conn = GetConnection("/Alan.hsiang"))
                 {
                     using (var channel = conn.CreateModel())
                     {
                         channel.ExchangeDeclare(exchange: "amq.fanout", type: ExchangeType.Fanout,durable:true);
                         
                         var body = Encoding.UTF8.GetBytes(msg);
 
                         channel.BasicPublish(exchange: "amq.fanout",
                                              routingKey: "",
                                              basicProperties: null,
                                              body: body);
 
                         //Console.WriteLine(" [x] Sent {0}", message);
                     };
                 };
                 return true;
             }
             catch (Exception ex)
             {
                 throw ex;
             }
         }
     }

    /// <summary>
     /// 扇形交换机接收消息
     /// </summary>
     public class RabbitMqFanoutReceiveHelper : RabbitMqHelper
     {
         public RabbitMqReceiveEventHandler OnReceiveEvent;
 
         private IConnection conn;
 
         private IModel channel;
 
         private EventingBasicConsumer consumer;
 
         public bool StartReceiveMsg(string queueName)
         {
             try
             {
                 conn = GetConnection("/Alan.hsiang");
 
                 channel = conn.CreateModel();
                 channel.ExchangeDeclare(exchange: "amq.fanout", type: ExchangeType.Fanout,durable:true);
                 //此处随机取出交换机下的队列
                 //var queueName = channel.QueueDeclare().QueueName;
                 channel.QueueBind(queue: queueName, exchange: "amq.fanout", routingKey: "");
                 consumer = new EventingBasicConsumer(channel);
                 consumer.Received += (model, ea) =>
                 {
                     var body = ea.Body.ToArray();
                     var message = Encoding.UTF8.GetString(body);
                     //Console.WriteLine(" [x] Received {0}", message);
                     if (OnReceiveEvent != null)
                     {
                         OnReceiveEvent(queueName+"::"+message);
                     }
                 };
                 channel.BasicConsume(queue: queueName,
                                         autoAck: true,
                                         consumer: consumer);
                 return true;
             }
             catch (Exception ex)
             {
                 throw ex;
             }
         }
     }