RabbitMQ （四） 路由选择 (Routing)

package com.zhy.rabbit._04_binding_key;

import java.util.Random;
import java.util.UUID;

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

public class EmitLogDirect
{

	private static final String EXCHANGE_NAME = "ex_logs_direct";
	private static final String[] SEVERITIES = { "info", "warning", "error" };

	public static void main(String[] argv) throws java.io.IOException
	{
		// 创建连接和频道
		ConnectionFactory factory = new ConnectionFactory();
		factory.setHost("localhost");
		Connection connection = factory.newConnection();
		Channel channel = connection.createChannel();
		// 声明转发器的类型
		channel.exchangeDeclare(EXCHANGE_NAME, "direct");

		//发送6条消息
		for (int i = 0; i < 6; i++)
		{
			String severity = getSeverity();
			String message = severity + "_log :" + UUID.randomUUID().toString();
			// 发布消息至转发器，指定routingkey
			channel.basicPublish(EXCHANGE_NAME, severity, null, message
					.getBytes());
			System.out.println(" [x] Sent '" + message + "'");
		}

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

	/**
	 * 随机产生一种日志类型
	 * 
	 * @return
	 */
	private static String getSeverity()
	{
		Random random = new Random();
		int ranVal = random.nextInt(3);
		return SEVERITIES[ranVal];
	}
}

package com.zhy.rabbit._04_binding_key;

import java.util.Random;

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

public class ReceiveLogsDirect
{

	private static final String EXCHANGE_NAME = "ex_logs_direct";
	private static final String[] SEVERITIES = { "info", "warning", "error" };

	public static void main(String[] argv) throws java.io.IOException,
			java.lang.InterruptedException
	{
		// 创建连接和频道
		ConnectionFactory factory = new ConnectionFactory();
		factory.setHost("localhost");
		Connection connection = factory.newConnection();
		Channel channel = connection.createChannel();
		// 声明direct类型转发器
		channel.exchangeDeclare(EXCHANGE_NAME, "direct");

		String queueName = channel.queueDeclare().getQueue();
		String severity = getSeverity();
		// 指定binding_key
		channel.queueBind(queueName, EXCHANGE_NAME, severity);
		System.out.println(" [*] Waiting for "+severity+" logs. To exit press CTRL+C");

		QueueingConsumer consumer = new QueueingConsumer(channel);
		channel.basicConsume(queueName, true, consumer);

		while (true)
		{
			QueueingConsumer.Delivery delivery = consumer.nextDelivery();
			String message = new String(delivery.getBody());

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

	/**
	 * 随机产生一种日志类型
	 * 
	 * @return
	 */
	private static String getSeverity()
	{
		Random random = new Random();
		int ranVal = random.nextInt(3);
		return SEVERITIES[ranVal];
	}
}