RabbitMQ工作模式-工作队列-编程知识

RabbitMQ工作模式-工作队列

官网关于工作模式的解释地址：https://www.rabbitmq.com/getstarted.html

Work Queue（工作队列）

生产者发消息，启动多个消费者来消费消息，每个消费者仅消费部分消息，可达到负载均衡的效果。

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创建生产者

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import java.nio.charset.StandardCharsets;public class Product {public static void main(String[] args) throws Exception {ConnectionFactory factory = new ConnectionFactory();factory.setUri("amqp://root:123456@node1:5672/%2f");//创建连接和队列Connection connection = factory.newConnection();Channel channel = connection.createChannel();//声明队列,持久化，不自动删除channel.queueDeclare("qu.wk", true, false, false, null);//声明交换机,消息持久化，不自动删除channel.exchangeDeclare("ex.wk", BuiltinExchangeType.DIRECT, true, false, null);//队列和交换机绑定channel.queueBind("qu.wk", "ex.wk", "rk.wq");for (int i = 0; i < 20; i++) {//发送消息channel.basicPublish("ex.wk","rk.wq", null, ("data msg " + i).getBytes(StandardCharsets.UTF_8));}channel.close();connection.close();}}

创建消费者

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.CancelCallback;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.DeliverCallback;
import com.rabbitmq.client.Delivery;
import java.io.IOException;
import java.nio.charset.StandardCharsets;public class Consumer {public static void main(String[] args) throws Exception {ConnectionFactory factory = new ConnectionFactory();factory.setUri("amqp://root:123456@node1:5672/%2f");Connection connection = factory.newConnection();Channel channel = connection.createChannel();//声明队列,持久化，不自动删除channel.queueDeclare("qu.wk", true, false, false, null);channel.basicConsume("qu.wk", new DeliverCallback() {@Overridepublic void handle(String consumerTag, Delivery message) throws IOException {System.out.println("收到的消息：" + new String(message.getBody(), StandardCharsets.UTF_8));}}, new CancelCallback() {@Overridepublic void handle(String consumerTag) throws IOException {System.out.println("cancel的消息:" + consumerTag);}});}
}