5.rabbitmq--通配符模式Topics

rabbitmq--通配符模式Topics

topic模式也称为主题模式，其实他相对于routing模式最大的好处就是他多了一种匹配模式的路由，怎么理解匹配呢，其实就相当于我们之前正则的.*这种，不过他的匹配机制可能不是这种（其实除了匹配规则外，他的作用就和routing模式一样 ），而他的工作流程图如下：

OK！ 先说一下他的匹配规则：

绑定键binding key也必须是这种形式。以特定路由键发送的消息将会发送到所有绑定键与之匹配的队列中。但绑定键有两种特殊的情况： 
①*（星号）仅代表一个单词 
②#（井号）代表任意个单词

示例：

以上图为例：

*.orange.* :  匹配以 任意一个单词字符开头中间包含 .orange. 以任意一个单词字符结尾 的字符串。比如 a.orange.b, sdfsd.orange.fdsfsdf 等（注意是一个单词）。

lay.# ：只要一lay.开头的都匹配，他可以匹配lay.a, lay.a.b, lay.b.c等。

这样是不是很方便，比如我们想将log的发给q1队列，其他的发给q2，那么我们只需要定义log.#、或者log.*,那么你发送给q1队列的数据就是log日志的消息。 

package com.maozw.mq.topic;

import com.maozw.mq.config.RabbitConfig;
import com.rabbitmq.client.Channel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.connection.Connection;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import static org.apache.log4j.varia.ExternallyRolledFileAppender.OK;

/**
 * work 模式
 * 两种分发： 轮询分发 + 公平分发
 * 轮询分发：消费端：自动确认消息；boolean autoAck = true;
 * 公平分发: 消费端：手动确认消息 boolean autoAck = false; channel.basicAck(envelope.getDeliveryTag(),false);
 *
 * @author MAOZW
 * @Description: 商品
 * @date 2018/11/26 15:06
 */
@RestController
@RequestMapping("/topic")
public class TopicProducer {
    private static final Logger LOGGER = LoggerFactory.getLogger(TopicProducer.class);
    @Autowired
    RabbitConfig rabbitConfig;

    public static final String EXCHANGE_TOPIC = "EXCHANGE_TOPIC";
    private static final String[] routingKeys = {"commodity.add", "commodity.update", "commodity.select", "commodity.delete"};

    @RequestMapping("/send")
    public String send() throws IOException, TimeoutException {
        Connection connection = null;
        Channel channel = null;
        try {
            ConnectionFactory connectionFactory = rabbitConfig.connectionFactory();
            connection = connectionFactory.createConnection();
            channel = connection.createChannel(false);

            /**
             * 申明交换机 以及type
             */
            channel.exchangeDeclare(EXCHANGE_TOPIC, "topic");
            /**
             * 发送消息
             * 每个消费者 发送确认消息之前，消息队列不会发送下一个消息给消费者，一次只处理一个消息
             * 自动模式无需设置下面设置
             */
            int prefetchCount = 1;
            channel.basicQos(prefetchCount);

            String Hello = ">>>> Hello EXCHANGE_TOPIC <<<<";
            String message = Hello;
            for (String routingKey : routingKeys) {
                channel.basicPublish(EXCHANGE_TOPIC, routingKey, null, message.getBytes());
            }
            LOGGER.info("生产消息： " + message);
            return "OK";
        } catch (Exception e) {

        } finally {
            connection.close();
            channel.close();
            return OK;
        }
    }
}

package com.maozw.mq.topic;

import com.maozw.mq.config.RabbitConfig;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.connection.Connection;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;

import java.io.IOException;

/**
 * @author MAOZW
 * @Description: ${todo}
 * @date 2018/11/26 15:06
 */

public class TopicConsumer {
    private static final Logger LOGGER = LoggerFactory.getLogger(TopicConsumer.class);
    public static final String EXCHANGE_TOPIC = "EXCHANGE_TOPIC";
    private static final String[] routingKeys = {"commodity.add", "commodity.update", "commodity.delete"};

    public static void main(String[] args) throws IOException {
        ConnectionFactory connectionFactory = RabbitConfig.getConnectionFactory();
        Connection connection = connectionFactory.createConnection();
        Channel channel = connection.createChannel(false);
        /**
         * 创建队列申明
         */
        boolean durable = true;
        channel.queueDeclare(RabbitConfig.QUEUE_TOPIC, durable, false, false, null);
        /**
         * 绑定队列到交换机
         */
        channel.queueBind(RabbitConfig.QUEUE_TOPIC, EXCHANGE_TOPIC, "commodity.add");


        /**
         * 改变分发规则
         */
        channel.basicQos(1);
        DefaultConsumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                super.handleDelivery(consumerTag, envelope, properties, body);
                System.out.println("[1] 接口数据 ： " + new String(body, "utf-8"));
                try {
                    Thread.sleep(300);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } finally {
                    System.out.println("[1] done!");
                    //消息应答：手动回执，手动确认消息
                    channel.basicAck(envelope.getDeliveryTag(), false);
                }
            }
        };
        //监听队列
        /**
         * autoAck 消息应答
         *  默认轮询分发打开：true ：这种模式一旦rabbitmq将消息发送给消费者，就会从内存中删除该消息，不关心客户端是否消费正常。
         *  使用公平分发需要关闭autoAck:false  需要手动发送回执
         */
        boolean autoAck = false;
        channel.basicConsume(RabbitConfig.QUEUE_TOPIC, autoAck, consumer);
    }

}

package com.maozw.mq.topic;

import com.maozw.mq.config.RabbitConfig;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.connection.Connection;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;

import java.io.IOException;

/**
 * @author MAOZW
 * @Description: ${todo}
 * @date 2018/11/26 15:06
 */

public class TopicConsumer2 {
    private static final Logger LOGGER = LoggerFactory.getLogger(TopicConsumer2.class);
    public static final String EXCHANGE_TOPIC = "EXCHANGE_TOPIC";
    private static final String[] routingKeys = {"commodity.add", "commodity.update", "commodity.delete", "commodity.select"};

    public static void main(String[] args) throws IOException {
        ConnectionFactory connectionFactory = RabbitConfig.getConnectionFactory();
        Connection connection = connectionFactory.createConnection();
        Channel channel = connection.createChannel(false);
        /**
         * 创建队列申明
         */
        boolean durable = true;
        channel.queueDeclare(RabbitConfig.QUEUE_TOPIC2, durable, false, false, null);

        /**
         * 绑定队列到交换机
         */
        channel.queueBind(RabbitConfig.QUEUE_TOPIC2, EXCHANGE_TOPIC, "commodity.*");


        /**
         * 改变分发规则
         */
        channel.basicQos(1);
        DefaultConsumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                super.handleDelivery(consumerTag, envelope, properties, body);
                System.out.println("[2] 接口数据 ： " + new String(body, "utf-8"));
                try {
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } finally {
                    System.out.println("[2] done! ");
                    //消息应答：手动回执，手动确认消息
                    channel.basicAck(envelope.getDeliveryTag(), false);
                }
            }
        };
        //监听队列
        /**
         * autoAck 消息应答
         *  默认轮询分发打开：true ：这种模式一旦rabbitmq将消息发送给消费者，就会从内存中删除该消息，不关心客户端是否消费正常。
         *  使用公平分发需要关闭autoAck:false  需要手动发送回执
         */
        boolean autoAck = false;
        channel.basicConsume(RabbitConfig.QUEUE_TOPIC2, autoAck, consumer);
    }
}