消费端限流

• Producer

public class Producer {

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

        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.6.99");
        factory.setPort(5672);
        factory.setVirtualHost("/");

        Connection connection = factory.newConnection();

        Channel channel = connection.createChannel();

        for(int i = 0;i<10;i++){
            channel.basicPublish("exchange","return.key",false,null,("hello world"+i).getBytes());
        }
    }
}

• Consumer

public class Consumer1 {

    public static void main(String[] args) throws IOException, TimeoutException, InterruptedException {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("192.168.6.99");
        factory.setPort(5672);
        factory.setVirtualHost("/");

        Connection connection = factory.newConnection();

        Channel channel = connection.createChannel();

        channel.exchangeDeclare("exchange","topic",true);
        channel.queueDeclare("queueName", true, false, false, null);

        channel.queueBind("queueName","exchange","return.key");

        /**
         * 增加限流
         */
        channel.basicQos(0,2,false);
        /**
         * 关闭自动确认消息
         */
        channel.basicConsume("queueName",false,new MyConsumer(channel));


    }
}

• 自定消息接收

public class MyConsumer extends DefaultConsumer {

    private Channel channel;
    /**
     * Constructs a new instance and records its association to the passed-in channel.
     *
     * @param channel the channel to which this consumer is attached
     */
    public MyConsumer(Channel channel) {
        super(channel);
        this.channel = channel;
    }


    @Override
    public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
        System.out.println("consumerTag "+consumerTag);
        System.out.println("envelope "+envelope);
        System.out.println("body "+new String(body));
        /**
         * 应答接收到的消息
         */
        channel.basicAck(envelope.getDeliveryTag(),false);

    }
}