rabbitmq(2)简单队列

rabbitmq

1、模型

一个生产者对应一个消费者：

这里写图片描述

2、代码

2.1、生产者

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
private final static String QUEUE_NAME = "hello";

public static void main(String[] args) throws Exception {

	ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("192.168.1.7");
    factory.setUsername("root");
    factory.setPassword("123456");
    
	Connection connection = factory.newConnection();
	Channel channel = connection.createChannel();
	
	/*
	 * rabbitmq是否将该队列中的消息进行持久化,保证rabbitmq中的消息不会应为rabbitmq重启而丢失
	 * 已经存在的队列不可以修改该参数,除非进rabbitmq删除该队列,否则会抛出异常
	 * Caused by: com.rabbitmq.client.ShutdownSignalException: 
	 * 		channel error; protocol method: #method<channel.close>(reply-code=406, reply-text=PRECONDITION_FAILED
	 *  	- inequivalent arg 'durable' for queue 'hello' in vhost '/': received 'true' but current is 'false', class-id=50, method-id=10)
	 */
	boolean durable = true;
	channel.queueDeclare(QUEUE_NAME, durable, false, false, null);
	String message = "Hello World!";
	channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
	System.out.println(" [1] Sent '" + message + "'");
	
	channel.close();
	connection.close();
}

2.2、消费者

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
private final static String QUEUE_NAME = "hello";

public static void main(String[] args) throws Exception {
	ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("192.168.1.7");
    factory.setUsername("root");
    factory.setPassword("123456");
    
	Connection connection = factory.newConnection();
	Channel channel = connection.createChannel();

	boolean durable = true;
	channel.queueDeclare(QUEUE_NAME, durable, false, false, null);
	System.out.println(" [*] Waiting for messages.");
	Consumer consumer = new DefaultConsumer(channel) {
		@Override
		public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
				byte[] body) throws IOException {
			String message = new String(body, "UTF-8");
			System.out.println(" [1] Received '" + message + "'");
		}
	};
	channel.basicConsume(QUEUE_NAME, true, consumer);
}
>