【RabbitMQ.Clinet笔记】Demo

Header交换机案例

        private void btnHeadersPublish_Click(object sender, EventArgs e)
        {
            using (var channel = connection.CreateModel())
            {
                channel.ExchangeDeclare("myHeadersExchange1", ExchangeType.Headers, true, false, null);
                channel.QueueDeclare("headers_queue1", true, false, false, null);
                channel.QueueBind("headers_queue1", "myHeadersExchange1", string.Empty, new Dictionary<string, object>() {
                        {"x-match","all" },//any
                        { "username","fan"},
                        { "password","123456"}
                    });
                //properties
                var properties = channel.CreateBasicProperties();
                properties.Headers = new Dictionary<string, object>();
                properties.Headers.Add("username", "fan");
                properties.Headers.Add("password", "123456");
                properties.Persistent = true;//消息持久化
                //发布info消息
                for (int i = 0; i < 100; i++)
                {
                    var msg = Encoding.UTF8.GetBytes($"{i}:haha");
                    channel.BasicPublish("myHeadersExchange1", string.Empty, properties, msg);
                }
            }
        }

Demo2.消费消息两种方式

        /// <summary>
        /// 手动拉消息
        /// </summary>
        /// <param name="queueName"></param>
        private void ConsumePullQueue(string queueName)
        {
            var channel = connection.CreateModel();
            var result = channel.BasicGet(queueName, false);//autoACK:false 开启手动确认
            try
            {
                //处理消息
                MessageBox.Show(Encoding.UTF8.GetString(result.Body));
                //手动确认
                channel.BasicAck(result.DeliveryTag, false);
            }
            catch
            {
                //退回
                channel.BasicRecover(true);
            }
            //直接扔了
            //channel.BasicReject(result.DeliveryTag, true);
            //否认确认
            //channel.BasicNack()
        }
        /// <summary>
        /// 自动推消息
        /// 如果多个消费者订阅一个队列，将轮询获取消息
        /// </summary>
        /// <param name="queueNames"></param>
        private void ConsumeEventQueue(string queueName)
        {
            var channel = connection.CreateModel();
            //开启QOS并行限制,每次发送一条，ack后再发送一条
            channel.BasicQos(0, 1, false);
            //通过事件订阅方式消费队列
            EventingBasicConsumer consumer1 = new EventingBasicConsumer(channel);
            consumer1.Received += (sender1, e1) =>
            {
                MessageBox.Show(Encoding.UTF8.GetString(e1.Body));
                channel.BasicAck(e1.DeliveryTag, false);//手动确认
            };
            channel.BasicConsume(queueName, false, consumer1);//开始消费.（autoACK:false 手动确认）
        }

Demo3.生产端消息确认、事务执行

//confirm确认(推荐)
            using (var channel = connection.CreateModel())
            {
                var properties = channel.CreateBasicProperties();
                properties.Persistent = true;//消息持久化
                channel.ConfirmSelect();//将信道设置成confirm模式
                                        //5：发布消息
                for (int i = 0; i < 100; i++)
                {
                    var msg = Encoding.UTF8.GetBytes($"{i}:haha");
                    channel.BasicPublish(exchangeName, routingKey, properties, msg);
                }
                bool isSuccess = channel.WaitForConfirms();//是否发布成功
            }

//事务执行（低效，不推荐）
            using (var channel = connection.CreateModel())
            {
                var properties = channel.CreateBasicProperties();
                properties.Persistent = true;//消息持久化
                channel.TxSelect();//将信道设置成事务模式
                try
                {
                    for (int i = 0; i < 100; i++)
                    {
                        var msg = Encoding.UTF8.GetBytes($"{i}:haha");
                        channel.BasicPublish(exchangeName, routingKey, properties, msg);
                    }
                    channel.TxCommit();
                }
                catch
                {
                    channel.TxRollback();
                }
            }

参考：
https://www.rabbitmq.com/getstarted.html