读书笔记-rabbitmq实战指南

生产者

public class RabbitProducer {
    private static final String EXCHANGE_NAME = "exchange_demo";
    private static final String ROUTING_KEY = "routingkey_demo";
    private static final String QUEUE_NAME = "queue_demo";
    private static final String IP_ADDRESS = "192.168.20.4";
    private static final int PORT = 5672;//RabbitMQ（AMQP） 服务端默认端口号为 5672

    public static void main(String[] args) throws IOException,
            TimeoutException, InterruptedException {

        Connection connection = ConnectionUtils.getConnection(IP_ADDRESS, PORT, "my_vhost",
                "admin", "admin");
        Channel channel = connection.createChannel();
        // 创建一个 type="direct" 、持久化的、非自动删除的交换器
        channel.exchangeDeclare(EXCHANGE_NAME, "direct", true, false, null);
        // 创建一个持久化、非排他的、非自动删除的队列
        channel.queueDeclare(QUEUE_NAME, true, false, false, null);
        // 将交换器与队列通过路由键绑定
        channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, ROUTING_KEY);
        // 发送一条持久化的消息: hello world !
        String message = "Hello World !";
        // 消息发布
        channel.basicPublish(EXCHANGE_NAME, ROUTING_KEY,
                MessageProperties.PERSISTENT_TEXT_PLAIN,
                message.getBytes());
        //关闭资源
        ConnectionUtils.close(channel, connection);
    }
}

消费者

public class RabbitConsumer {
    private static final String QUEUE_NAME = "queue_demo";
    private static final String IP_ADDRESS = "192.168.20.4";
    private static final int PORT = 5672;

    public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
        Address[] addresses = new Address[]{
                new Address(IP_ADDRESS, PORT)
        };

        ConnectionFactory factory = new ConnectionFactory();
        factory.setVirtualHost("my_vhost");
        factory.setUsername("admin");
        factory.setPassword("admin");
        Connection connection = factory.newConnection(addresses);
        final Channel channel = connection.createChannel();
        // 设置客户端最多未被ack的个数
        channel.basicQos(64);
        Consumer consumer = new DefaultConsumer(channel) {
            @Override
            public void handleDelivery(String consumerTag,
                                       Envelope envelope,
                                       AMQP.BasicProperties properties,
                                       byte[] body)
                    throws IOException {
                System.out.println(" recv message: " + new String(body));
                try {
                    TimeUnit.SECONDS.sleep(1);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                channel.basicAck(envelope.getDeliveryTag(), false);
            }
        };
        channel.basicConsume(QUEUE_NAME, consumer);
        // 等待回调函数执行完毕之后 关闭资源
        TimeUnit.SECONDS.sleep(5);
        ConnectionUtils.close(channel, connection);
    }
}

消息包括两个部分

消息体(payload)和标签体,消息体一般是一个json格式的数据,标签体包含一个交换器名称和路由键

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交换器

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AMQP协议

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