【RabbitMQ】05 通配符模式

需要设定交换机模式为通配符模式 Topic

在绑定规则上采用通配描述实现动态绑定

创建通配符模式的生产者

package cn.dzz.topicQueue;

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;

import java.nio.charset.StandardCharsets;

public class TopicInProducer {

    public static void main(String[] args) throws Exception{
        ConnectionFactory connectionFactory = new ConnectionFactory();

        connectionFactory.setHost("192.168.2.121");
        connectionFactory.setPort(ConnectionFactory.DEFAULT_AMQP_PORT); // 5672
        connectionFactory.setVirtualHost("/dzz"); // 虚拟主机？ 默认值 /
        connectionFactory.setUsername("test"); // guest
        connectionFactory.setPassword("123456"); // guest

        Connection connection = connectionFactory.newConnection();
        Channel channel = connection.createChannel();

        /**
         *  多了一个创建交换机的过程
         *  public DeclareOk exchangeDeclare(String exchange, BuiltinExchangeType type, boolean durable, boolean autoDelete, boolean internal, Map<String, Object> arguments) throws IOException {
         *      return this.exchangeDeclare(exchange, type.getType(), durable, autoDelete, internal, arguments);
         *  }
         *  String exchange 交换机名称
         *  String type 交换机类型，这里换成枚举类型，方便查找 com.rabbitmq.client.BuiltinExchangeType
         *      DIRECT("direct"), 定向  简单模式 和 工作模式
         *      FANOUT("fanout"), 扇形  广播（通知给所有和这个交换机绑定的队列）
         *      TOPIC("topic"), 通配符 ？
         *      HEADERS("headers"); 参数匹配， 视频暂不讲解
         *  boolean durable 持久化
         *  boolean autoDelete 自动删除
         *  boolean internal 内部使用 一般false
         *  Map<String, Object> arguments
        */
        String exchangeName = "test_topic";
        channel.exchangeDeclare(
                exchangeName,
                BuiltinExchangeType.TOPIC,
                true,
                false,
                false,
                null
        );

        // 这里队列的声明其实可以按照规则声明， 交换机名称 队列名称 队列序号这样
        String queueName1 = "test_topic - topicQueue - 1";
        String queueName2 = "test_topic - topicQueue - 2";
        channel.queueDeclare(queueName1, true, false, false, null);
        channel.queueDeclare(queueName2, true, false, false, null);

        // Topic的精髓在于指定我们想要的规则
        channel.queueBind(queueName1, exchangeName, "#.error");
        channel.queueBind(queueName1, exchangeName, "order.*");
        channel.queueBind(queueName2, exchangeName, "*.*");

        // 发送消息 这里制定一些不同的消息 以做出区分
        String level = "order.info";
        for (int i = 0; i < 20; i++) {
            if (i == 5) level = "order.warning";
            if (i == 10) level = "goods.warning";
            else if (i == 14) level = "order.error";

            String body = "sending routine msg " + i + level;
            channel.basicPublish(exchangeName, level, null, body.getBytes(StandardCharsets.UTF_8));
        }

        // 释放资源
        channel.close();
        connection.close();
    }
}

讲交换机的时候视频故意不改Topic模式

其实是想介绍这个删除功能，这样就可以删除交换机了

但是Topic队列的消息还保存在里面

找到对应的队列，也可以删除这个的队列的消息

然后创建消费者接收Topic交换机发送的消息：

package cn.dzz.topicQueue;

import com.rabbitmq.client.*;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class TopicQueueInConsumer2 {

    /**
     * 工作队列 消费者
     * @param args
     */
    public static void main(String[] args) throws Exception{
        ConnectionFactory connectionFactory = new ConnectionFactory();

        connectionFactory.setHost("192.168.2.121");
        connectionFactory.setPort(ConnectionFactory.DEFAULT_AMQP_PORT); // 5672
        connectionFactory.setVirtualHost("/dzz"); // 虚拟主机？ 默认值 /
        connectionFactory.setUsername("test"); // guest
        connectionFactory.setPassword("123456"); // guest

        Connection connection = connectionFactory.newConnection();
        Channel channel = connection.createChannel();

        // 声明将不在需要
        // channel.queueDeclare("work_queue", true, false, false, null);

        // 从生产者复制过来需要的队列名称
        String queueName1 = "test_topic - topicQueue - 1";
        String queueName2 = "test_topic - topicQueue - 2";

        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("body(message) " + new String(body, StandardCharsets.UTF_8));
                System.out.println("- - - - - over - - - - -");
            }
        };

        channel.basicConsume(queueName2, true, consumer);
    }
}

执行完生产者之后，然后再执行消费者1 和2

"C:\Program Files (x86)\Java\jdk1.8.0_291\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2021.2.1\lib\idea_rt.jar=49785:C:\Program Files\JetBrains\IntelliJ IDEA 2021.2.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\charsets.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\deploy.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\access-bridge-32.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\cldrdata.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\dnsns.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\jaccess.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\jfxrt.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\localedata.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\nashorn.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\sunec.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\sunjce_provider.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\sunmscapi.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\sunpkcs11.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\zipfs.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\javaws.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\jce.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\jfr.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\jfxswt.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\jsse.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\management-agent.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\plugin.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\resources.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\rt.jar;C:\Users\Administrator\IdeaProjects\RabbitMQ\ConsumerService\target\classes;C:\Users\Administrator\.m2\repository\com\rabbitmq\amqp-client\5.6.0\amqp-client-5.6.0.jar;C:\Users\Administrator\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar" cn.dzz.topicQueue.TopicQueueInConsumer1
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
body(message) sending routine msg 0order.info
- - - - - over - - - - -
body(message) sending routine msg 1order.info
- - - - - over - - - - -
body(message) sending routine msg 2order.info
- - - - - over - - - - -
body(message) sending routine msg 3order.info
- - - - - over - - - - -
body(message) sending routine msg 4order.info
- - - - - over - - - - -
body(message) sending routine msg 5order.warning
- - - - - over - - - - -
body(message) sending routine msg 6order.warning
- - - - - over - - - - -
body(message) sending routine msg 7order.warning
- - - - - over - - - - -
body(message) sending routine msg 8order.warning
- - - - - over - - - - -
body(message) sending routine msg 9order.warning
- - - - - over - - - - -
body(message) sending routine msg 14order.error
- - - - - over - - - - -
body(message) sending routine msg 15order.error
- - - - - over - - - - -
body(message) sending routine msg 16order.error
- - - - - over - - - - -
body(message) sending routine msg 17order.error
- - - - - over - - - - -
body(message) sending routine msg 18order.error
- - - - - over - - - - -
body(message) sending routine msg 19order.error
- - - - - over - - - - -

可以看出消费者1是接收不到goods的消息的：

"C:\Program Files (x86)\Java\jdk1.8.0_291\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2021.2.1\lib\idea_rt.jar=49765:C:\Program Files\JetBrains\IntelliJ IDEA 2021.2.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\charsets.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\deploy.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\access-bridge-32.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\cldrdata.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\dnsns.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\jaccess.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\jfxrt.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\localedata.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\nashorn.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\sunec.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\sunjce_provider.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\sunmscapi.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\sunpkcs11.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\ext\zipfs.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\javaws.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\jce.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\jfr.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\jfxswt.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\jsse.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\management-agent.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\plugin.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\resources.jar;C:\Program Files (x86)\Java\jdk1.8.0_291\jre\lib\rt.jar;C:\Users\Administrator\IdeaProjects\RabbitMQ\ConsumerService\target\classes;C:\Users\Administrator\.m2\repository\com\rabbitmq\amqp-client\5.6.0\amqp-client-5.6.0.jar;C:\Users\Administrator\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar" cn.dzz.topicQueue.TopicQueueInConsumer2
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
body(message) sending routine msg 0order.info
- - - - - over - - - - -
body(message) sending routine msg 1order.info
- - - - - over - - - - -
body(message) sending routine msg 2order.info
- - - - - over - - - - -
body(message) sending routine msg 3order.info
- - - - - over - - - - -
body(message) sending routine msg 4order.info
- - - - - over - - - - -
body(message) sending routine msg 5order.warning
- - - - - over - - - - -
body(message) sending routine msg 6order.warning
- - - - - over - - - - -
body(message) sending routine msg 7order.warning
- - - - - over - - - - -
body(message) sending routine msg 8order.warning
- - - - - over - - - - -
body(message) sending routine msg 9order.warning
- - - - - over - - - - -
body(message) sending routine msg 10goods.warning
- - - - - over - - - - -
body(message) sending routine msg 11goods.warning
- - - - - over - - - - -
body(message) sending routine msg 12goods.warning
- - - - - over - - - - -
body(message) sending routine msg 13goods.warning
- - - - - over - - - - -
body(message) sending routine msg 14order.error
- - - - - over - - - - -
body(message) sending routine msg 15order.error
- - - - - over - - - - -
body(message) sending routine msg 16order.error
- - - - - over - - - - -
body(message) sending routine msg 17order.error
- - - - - over - - - - -
body(message) sending routine msg 18order.error
- - - - - over - - - - -
body(message) sending routine msg 19order.error
- - - - - over - - - - -

Topic模式就是基于路由规则规划队列消息处理

相比前面的Routine模式要显得更灵活一些