RabbitMQ模式の直连模式

目录

• 1、说明
• 2、模型图
• 3、代码示例
  • 3.1、生产者
  • 3.2、消费者

1、说明

一个生产者P发送消息到队列Q,一个消费者C接收

2、模型图

3、代码示例

3.1、生产者

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

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

import static java.nio.charset.StandardCharsets.UTF_8;
import static org.apache.commons.lang3.StringUtils.EMPTY;

public class Publisher {

    private static final String MQ_VIRTUAL_HOST     = "VHOST::TUTORIAL";
    private static final String MQ_QUEUE_NAME       = "QUEUE::TUTORIAL";

    public static void main(String[] args) {
        Connection connection = null;
        Channel channel = null;
        try {
            final ConnectionFactory factory = new ConnectionFactory();
            factory.setHost("127.0.0.1");
            factory.setPort(5672);
            factory.setUsername("admin");
            factory.setPassword("romens");
            factory.setVirtualHost(MQ_VIRTUAL_HOST);

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

            /*
             * 如果RabbitMQ服务器已经建好了队列，可以不用再声明创建队列（若队列已存在，则不再新建）
             * 参数说明：
             *  queue      – 队列名称
             *  durable    – 该队列是否持久化
             *  exclusive  – 该队列是否独占
             *  autoDelete – 长时间未使用服务器是否自动删除
             *  arguments  – 附加参数
             */
            // channel.queueDeclare("QUEUE::CHAPTER01", false, false, false, null);

            channel.basicPublish(EMPTY, MQ_QUEUE_NAME, null, "Hello Kitty".getBytes(UTF_8));
        } catch (IOException | TimeoutException e) {
            e.printStackTrace();
        } finally {
            if (Objects.nonNull(channel)) {
                try {
                    channel.close();
                } catch (IOException | TimeoutException e) {
                    e.printStackTrace();
                }
            }
            if (Objects.nonNull(connection)) {
                try {
                    connection.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

}

3.2、消费者

import com.rabbitmq.client.*;

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

import static java.nio.charset.StandardCharsets.UTF_8;

public class Consumer {

    private static final String MQ_VIRTUAL_HOST     = "VHOST::TUTORIAL";
    private static final String MQ_QUEUE_NAME       = "QUEUE::TUTORIAL";

    public static void main(String[] args) {
        Connection connection = null;
        Channel channel = null;
        try {
            final ConnectionFactory factory = new ConnectionFactory();
            factory.setHost("127.0.0.1");
            factory.setPort(5672);
            factory.setUsername("admin");
            factory.setPassword("romens");
            factory.setVirtualHost(MQ_VIRTUAL_HOST);

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

            System.out.println("[*] Waiting for messages. To exits press CTRL+C");

            final DefaultConsumer consumer = new DefaultConsumer(channel) {

                @Override
                public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) {
                    System.out.println(" [X] Received '" + new String(body, UTF_8) + "'");
                }

            };

            channel.basicConsume(MQ_QUEUE_NAME, false, consumer);
            while (true) {
                synchronized (consumer) {
                    try {
                        consumer.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        } catch (IOException | TimeoutException e) {
            e.printStackTrace();
        } finally {
            if (Objects.nonNull(channel)) {
                try {
                    channel.close();
                } catch (IOException | TimeoutException e) {
                    e.printStackTrace();
                }
            }
            if (Objects.nonNull(connection)) {
                try {
                    connection.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

}