为什么80%的码农都做不了架构师？>>> 
上一节的一个工程中两个类，一个负责发送，一个负责接收，也就是一一对于的关系。
只要消息发出了，接收者就处理；当接收效率较低时，就会出现接收者处理不过来，我们就可能会处理不过来，于是我们就可能多配置接受者。这个模式就是"Work queues",它的结构如下
多个接收者，它们会出现什么情况呢？是否像大锅饭，有的人撑死，有的人饿死。这个通过例子验证。
一、编写代码
1、编写常量类RabbitWorkQueuesConstant
package com.lvgang.springbootrabbitmq.workqueues;
/**
* @author lvgang
*/
public class RabbitWorkQueuesConstant {
public static final String QUEUQ = "Queue_WorkQueues";
}
2、编写配置类RabbitWorkQueuesConfig
package com.lvgang.springbootrabbitmq.workqueues;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* @author lvgang
*/
@Configuration
public class RabbitWorkQueuesConfig {
/**
* Queue 可以有4个参数
* 1.队列名
* 2.durable 持久化消息队列 ,rabbitmq重启的时候不需要创建新的队列 默认true
* 3.auto-delete 表示消息队列没有在使用时将被自动删除 默认是false
* 4.exclusive 表示该消息队列是否只在当前connection生效,默认是false
*/
@Bean
public Queue createWorkQueuesQueue() {
return new Queue(RabbitWorkQueuesConstant.QUEUQ,true);
}
}3、编写消息生产者WorkQueuesSender
package com.lvgang.springbootrabbitmq.workqueues;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.Date;
import java.util.UUID;
/**
* @author lvgang
*/
@Component
public class WorkQueuesSender {
private static Logger logger = LoggerFactory.getLogger(WorkQueuesSender.class);
@Autowired
private RabbitTemplate rabbitTemplate;
public void send(int i) {
CorrelationData correlationData = new CorrelationData(UUID.randomUUID().toString());
String message = "WorkQueues="+ i+"," + new Date() + ", content= " + UUID.randomUUID().toString();
rabbitTemplate.convertAndSend(RabbitWorkQueuesConstant.QUEUQ,(Object) message,correlationData);
logger.info("send ok,"+new Date()+","+message);
}
}
4、编写消息接收者1WorkQueuesReceiver1
package com.lvgang.springbootrabbitmq.workqueues;
import com.lvgang.springbootrabbitmq.helloworld.HelloWorldSender;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
import java.util.Date;
/**
* @author lvgang
*/
@Component
@RabbitListener(queues = RabbitWorkQueuesConstant.QUEUQ)
public class WorkQueuesReceiver1 {
private static Logger logger = LoggerFactory.getLogger(HelloWorldSender.class);
@RabbitHandler
public void process(String message) {
logger.info("Receiver1 : " + message +","+ new Date());
}
}5、编写消息接收者2WorkQueuesReceiver2
package com.lvgang.springbootrabbitmq.workqueues;
import com.lvgang.springbootrabbitmq.helloworld.HelloWorldSender;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
import java.util.Date;
/**
* @author lvgang
*/
@Component
@RabbitListener(queues = RabbitWorkQueuesConstant.QUEUQ)
public class WorkQueuesReceiver2 {
private static Logger logger = LoggerFactory.getLogger(HelloWorldSender.class);
@RabbitHandler
public void process(String message) {
logger.info("Receiver2 : " + message +","+ new Date());
}
}
二、测试结果
1、编写测试类WorkQueuesTests
package com.lvgang.springbootrabbitmq.workqueues;
import com.lvgang.springbootrabbitmq.helloworld.HelloWorldSender;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest
public class WorkQueuesTests {
private static Logger logger = LoggerFactory.getLogger(HelloWorldSender.class);
@Autowired
private WorkQueuesSender workQueuesSender;
@Test
public void hello() throws Exception {
int i=1;
while (true) {
try {
if(i<=10) {
workQueuesSender.send(i);
}
i++;
Thread.sleep(1000);
} catch (Exception e) {
logger.error(e.getMessage(),e);
}
}
}
}
2、执行测试类，并查看结果
通过执行测类，查看到了消息消费的情况，生产者共计生产了10个消息，这10个消息分别被消费者1，消费者2，分别消费了5条。