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祈雨的笔记

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rabbitmq(6)路由模式
祈雨的笔记 · 2018-03-25 · via 祈雨的笔记

1、模型

路由模式为升级版的订阅模式,增加了消费者选择性接收消息的功能。
每个消费者可以绑定多个routingKey,生产者在发送消息时指定routingKey致使只有绑定了该routingKey的消费者才能接收到此消息

这里写图片描述

2.代码

2.1、生产者

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private final static String EXCHANGE_NAME = "test_direct_exchange";

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();




channel.exchangeDeclare(EXCHANGE_NAME, "direct");

String message = "Hello world";


String routingKey = "key2";
channel.basicPublish(EXCHANGE_NAME, routingKey, null, message.getBytes());
System.out.println(" [x] Sent '" + message + "'");

channel.close();
connection.close();
}

2.2、消费者1

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private final static String EXCHANGE_NAME = "test_direct_exchange";

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();
final Channel channel = connection.createChannel();

channel.exchangeDeclare(EXCHANGE_NAME, "direct");
String queueName = channel.queueDeclare().getQueue();

channel.queueBind(queueName, EXCHANGE_NAME, "key1");

System.out.println(" [1] 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.basicAck(envelope.getDeliveryTag(), false);
}
};
boolean autoAck = false;
channel.basicConsume(queueName, autoAck, consumer);
}

2.2、消费者2

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private final static String EXCHANGE_NAME = "test_direct_exchange";

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();
final Channel channel = connection.createChannel();

channel.exchangeDeclare(EXCHANGE_NAME, "direct");
String queueName = channel.queueDeclare().getQueue();


channel.queueBind(queueName, EXCHANGE_NAME, "key1");
channel.queueBind(queueName, EXCHANGE_NAME, "key2");
channel.queueBind(queueName, EXCHANGE_NAME, "key3");

System.out.println(" [2] 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(" [2] Received '" + message + "'");

channel.basicAck(envelope.getDeliveryTag(), false);
}
};
boolean autoAck = false;
channel.basicConsume(queueName, autoAck, consumer);
}