RabbitMQ帮助类的封装

基本部分

csharp 复制代码

public class RabbitMQInvoker
{

    #region Identy 
    private static IConnection _CurrentConnection = null;
    private readonly string _HostName = null;
    private readonly string _UserName = null;
    private readonly string _Password = null;
    #endregion

    public RabbitMQInvoker(string hostName = "localhost", string userName = "guest", string password = "guest")
    {
        this._HostName = hostName;
        this._UserName = userName;
        this._Password = password;
    }

    ......
}

初始化链接

csharp 复制代码

	#region 初始化链接 
    private static object RabbitMQInvoker_InitLock = new object();
    private void InitConnection()
    {
        if (_CurrentConnection == null || !_CurrentConnection.IsOpen)
        {
            lock (RabbitMQInvoker_InitLock)
            {
                if (_CurrentConnection == null || !_CurrentConnection.IsOpen)
                {
                    var factory = new ConnectionFactory()
                    {
                        HostName = this._HostName,
                        Password = this._Password,
                        UserName = this._UserName
                    };
                    _CurrentConnection = factory.CreateConnection();
                }
            }
        }
    }
    #endregion

初始化交换机

csharp 复制代码

	#region 初始化交换机 
    private static Dictionary<string, bool> RabbitMQInvoker_ExchangeQueue = new Dictionary<string, bool>();
    private static object RabbitMQInvoker_BindQueueLock = new object();
    /// <summary>
    /// 必须先声明exchange--检查+初始化
    /// </summary>
    /// <param name="rabbitMQConsumerModel"></param>
    private void InitExchange(string exchangeName)
    {
        if (!RabbitMQInvoker_ExchangeQueue.ContainsKey($"InitExchange_{exchangeName}"))//没用api确认
        {
            lock (RabbitMQInvoker_BindQueueLock)
            {
                if (!RabbitMQInvoker_ExchangeQueue.ContainsKey($"InitExchange_{exchangeName}"))
                {
                    this.InitConnection();
                    using (IModel channel = _CurrentConnection.CreateModel())
                    {
                        channel.ExchangeDeclare(exchange: exchangeName, type: ExchangeType.Fanout, durable: true, autoDelete: false, arguments: null);
                    }
                    RabbitMQInvoker_ExchangeQueue[$"InitExchange_{exchangeName}"] = true;
                }
            }
        }
    }

    /// <summary>
    /// 初始化绑定关系
    /// </summary>
    /// <param name="rabbitMQConsumerModel"></param>
    private void InitBindQueue(RabbitMQConsumerModel rabbitMQConsumerModel)
    {
        if (!RabbitMQInvoker_ExchangeQueue.ContainsKey($"InitBindQueue_{rabbitMQConsumerModel.ExchangeName}_{rabbitMQConsumerModel.QueueName}"))
        {
            lock (RabbitMQInvoker_BindQueueLock)
            {
                if (!RabbitMQInvoker_ExchangeQueue.ContainsKey($"InitBindQueue_{rabbitMQConsumerModel.ExchangeName}_{rabbitMQConsumerModel.QueueName}"))
                {
                    this.InitConnection();
                    using (IModel channel = _CurrentConnection.CreateModel())
                    {
                        channel.ExchangeDeclare(exchange: rabbitMQConsumerModel.ExchangeName, type: ExchangeType.Fanout, durable: true, autoDelete: false, arguments: null);
                        channel.QueueDeclare(queue: rabbitMQConsumerModel.QueueName, durable: true, exclusive: false, autoDelete: false, arguments: null);
                        channel.QueueBind(queue: rabbitMQConsumerModel.QueueName, exchange: rabbitMQConsumerModel.ExchangeName, routingKey: string.Empty, arguments: null);
                    }
                    RabbitMQInvoker_ExchangeQueue[$"InitBindQueue_{rabbitMQConsumerModel.ExchangeName}_{rabbitMQConsumerModel.QueueName}"] = true;
                }
            }
        }
    }
    #endregion

发送信息

csharp 复制代码

	#region 发送消息
    /// <summary>
    /// 只管exchange---
    /// 4种路由类型？
    /// 
    /// Send前完成交换机初始化
    /// </summary>
    /// <param name="exchangeName"></param>
    /// <param name="message">建议Json格式</param>
    public void Send(string exchangeName, string message)
    {
        this.InitExchange(exchangeName);

        if (_CurrentConnection == null || !_CurrentConnection.IsOpen)
        {
            this.InitConnection();
        }
        using (var channel = _CurrentConnection.CreateModel())//开辟新的信道通信
        {
            try
            {
                channel.TxSelect();//开启Tx事务---RabbitMQ协议级的事务-----强事务

                var body = Encoding.UTF8.GetBytes(message);
                channel.BasicPublish(exchange: exchangeName,
                                     routingKey: string.Empty,
                                     basicProperties: null,
                                     body: body);
                channel.TxCommit();//提交
                Console.WriteLine($" [x] Sent {body.Length}");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                Console.WriteLine($"【{message}】发送到Broker失败！{ex.Message}");
                channel.TxRollback(); //事务回滚--前面的所有操作就全部作废了。。。。
            }
        }
    }
    #endregion

接收信息

csharp 复制代码

	#region Receive
    /// <summary>
    /// 注册处理动作
    /// </summary>
    /// <param name="rabbitMQConsumerMode"></param>
    /// <param name="func"></param>
    public void RegistReciveAction(RabbitMQConsumerModel rabbitMQConsumerMode, Func<string, bool> func)
    {
        this.InitBindQueue(rabbitMQConsumerMode);

        Task.Run(() =>
        {
            using (var channel = _CurrentConnection.CreateModel())
            {
                var consumer = new EventingBasicConsumer(channel);
                channel.BasicQos(0, 0, true);
                consumer.Received += (sender, ea) =>
                {
                    string str = Encoding.UTF8.GetString(ea.Body.ToArray());
                    if (func(str))
                    {
                        channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);//确认已消费
                    }
                    else
                    {
                        channel.BasicReject(deliveryTag: ea.DeliveryTag, requeue: true);//放回队列--重新包装信息，放入其他队列
                    }
                };
                channel.BasicConsume(queue: rabbitMQConsumerMode.QueueName,
                                     autoAck: false,//不ACK
                                     consumer: consumer);
                Console.WriteLine($" Register Consumer To {rabbitMQConsumerMode.ExchangeName}-{rabbitMQConsumerMode.QueueName}");
                Console.ReadLine();
                Console.WriteLine($" After Register Consumer To {rabbitMQConsumerMode.ExchangeName}-{rabbitMQConsumerMode.QueueName}");
            }
        });
    }
    #endregion