RabbitMQ 模拟实现【六】：程序模拟实现

模拟实现

模拟消费者

package com.example.demo.demo;

import com.example.demo.common.Consumer;
import com.example.demo.common.MqException;
import com.example.demo.mqclient.Channel;
import com.example.demo.mqclient.Connection;
import com.example.demo.mqclient.ConnectionFactory;
import com.example.demo.mqsever.core.BasicProperties;
import com.example.demo.mqsever.core.ExchangeType;

import java.io.IOException;

/*
 * 这个类表示一个消费者.
 * 通常这个类也应该是在一个独立的服务器中被执行
 */
public class DemoConsumer {
    public static void main(String[] args) throws IOException, MqException, InterruptedException {
        System.out.println("启动消费者!");
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        factory.setPort(9090);

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

        channel.exchangeDeclare("testExchange", ExchangeType.DIRECT, true, false, null);
        channel.queueDeclare("testQueue", true, false, false, null);

        channel.basicConsume("testQueue", true, new Consumer() {
            @Override
            public void handleDelivery(String consumerTag, BasicProperties basicProperties, byte[] body) throws MqException, IOException {
                System.out.println("[消费数据] 开始!");
                System.out.println("consumerTag=" + consumerTag);
                System.out.println("basicProperties=" + basicProperties);
                String bodyString = new String(body, 0, body.length);
                System.out.println("body=" + bodyString);
                System.out.println("[消费数据] 结束!");
            }
        });

        // 由于消费者也不知道生产者要生产多少, 就在这里通过这个循环模拟一直等待消费.
        while (true) {
            Thread.sleep(500);
        }
    }
}

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模拟生产者

package com.example.demo.demo;

import com.example.demo.mqclient.Channel;
import com.example.demo.mqclient.Connection;
import com.example.demo.mqclient.ConnectionFactory;
import com.example.demo.mqsever.core.ExchangeType;

import java.io.IOException;

/*
 * 这个类用来表示一个生产者.
 * 通常这是一个单独的服务器程序.
 */
public class DemoProducer {
    public static void main(String[] args) throws IOException, InterruptedException {
        System.out.println("启动生产者");
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("127.0.0.1");
        factory.setPort(9090);

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

        // 创建交换机和队列
        channel.exchangeDeclare("testExchange", ExchangeType.DIRECT, true, false, null);
        channel.queueDeclare("testQueue", true, false, false, null);

        // 创建一个消息并发送
        byte[] body = "hello".getBytes();
        boolean ok = channel.basicPublish("testExchange", "testQueue", null, body);
        System.out.println("消息投递完成! ok=" + ok);

        Thread.sleep(500);
        channel.close();
        connection.close();
    }
}

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效果展示

启动结果如下：