学习RabbitMQ(第三章)

mac2022-06-30  90

 

消费者集群分摊消费模式

1.首先启动两个消费者

启动第一个消费者

package com.consumer; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.rabbitmq.client.DefaultConsumer; import com.rabbitmq.client.Envelope; import com.rabbitmq.client.AMQP.BasicProperties; import com.utils.MQConnectionUtils; public class Consumer { //队列名称 private static final String QUEUE_NAME ="zrf_644"; public static void main(String[] args) throws IOException, TimeoutException { System.out.println("消费者01"); //1.创建一个新的连接 Connection connection = MQConnectionUtils.newConnection(); //2.创建通道 Channel channel = connection.createChannel(); //3.创建一个队列 参数1:队列名称 参数2:是否持久化 参数3:是否唯一 参数4:是否自动删除 channel.queueDeclare(QUEUE_NAME, false, false, false, null); DefaultConsumer defaultConsumer = new DefaultConsumer(channel) { //监听获取消息 @Override public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) throws IOException { String msg = new String(body,"UTF-8"); System.out.println("消费者获取生产者消息:"+msg); } }; //设置应该模式 设置为true 表示默认自动应答 channel.basicConsume(QUEUE_NAME, true,defaultConsumer); } }

 

启动第二个消费者

package com.consumer; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.rabbitmq.client.DefaultConsumer; import com.rabbitmq.client.Envelope; import com.rabbitmq.client.AMQP.BasicProperties; import com.utils.MQConnectionUtils; public class Consumer { //队列名称 private static final String QUEUE_NAME ="zrf_644"; public static void main(String[] args) throws IOException, TimeoutException { System.out.println("消费者02"); //1.创建一个新的连接 Connection connection = MQConnectionUtils.newConnection(); //2.创建通道 Channel channel = connection.createChannel(); //3.创建一个队列 参数1:队列名称 参数2:是否持久化 参数3:是否唯一 参数4:是否自动删除 channel.queueDeclare(QUEUE_NAME, false, false, false, null); DefaultConsumer defaultConsumer = new DefaultConsumer(channel) { //监听获取消息 @Override public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body) throws IOException { String msg = new String(body,"UTF-8"); System.out.println("消费者获取生产者消息:"+msg); } }; //设置应该模式 设置为true 表示默认自动应答 channel.basicConsume(QUEUE_NAME, true,defaultConsumer); } }

启动循环生产10个数据

package com.producer; import java.io.IOException; import java.util.concurrent.TimeoutException; import com.rabbitmq.client.Channel; import com.rabbitmq.client.Connection; import com.utils.MQConnectionUtils; //简单队列生产者 public class Producer { //队列名称 private static final String QUEUE_NAME ="zrf_644"; public static void main(String[] args) throws IOException, TimeoutException { //1.创建一个新的连接 Connection connection = MQConnectionUtils.newConnection(); //2.创建通道 Channel channel = connection.createChannel(); //3.创建一个队列 参数1:队列名称 参数2:是否持久化 参数3:是否唯一 参数4:是否自动删除 channel.queueDeclare(QUEUE_NAME, false, false, false, null); for(int i=0;i<10;i++) { //4.创建消息 String msg ="zrf_644444msg:"+i; //5.生产者发送消息 channel.basicPublish("", QUEUE_NAME, null, msg.getBytes()); System.out.println("生产者发送消息成功:"+msg); } //6.关闭通道和连接 channel.close(); connection.close(); } }

消费者01的显示 

消费者01 SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. 消费者获取生产者消息:zrf_644444msg:0 消费者获取生产者消息:zrf_644444msg:2 消费者获取生产者消息:zrf_644444msg:4 消费者获取生产者消息:zrf_644444msg:6 消费者获取生产者消息:zrf_644444msg:8

循环者02的显示

消费者02 SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. 消费者获取生产者消息:zrf_644444msg:1 消费者获取生产者消息:zrf_644444msg:3 消费者获取生产者消息:zrf_644444msg:5 消费者获取生产者消息:zrf_644444msg:7 消费者获取生产者消息:zrf_644444msg:9

可以看到这是根据分摊的方式进行消费的,实际上是根据取模的方式进行分摊消费的!

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