版权声明:本文为博主原创文章,欢迎转载,转载请注明作者、原文超链接 ,博主地址:https://blog.csdn.net/mr_chenjie_c。 https://blog.csdn.net/Mr_Chenjie_C/article/details/84939549
目前常用的消息队列大概有三种类型,RabbitMQ等AMQP系列, Kafka, Redis等key-value系列,它们的使用场景分别是:
1.RabbitMQ:相对重量级高并发的情况,比如数据的异步处理,任务的串行执行等.
2.Kafka:基于Pull的模式来处理,具体很高的吞吐量,一般用来进行,日志的存储和收集.
3.Redis:轻量级高并发,实时性要求高的情况,比如缓存,秒杀,及时的数据分析(ELK日志分析框架,使用的就是Redis).
这篇文章主要讲述Spring Boot基于Redis快速实现消息队列。
环境依赖
在pom文件,加入spring-boot-starter-data-redis依赖:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
注册StringRedisTemplate
@Configuration
public class PublisherConfig {
@Bean
public StringRedisTemplate getRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
return new StringRedisTemplate(redisConnectionFactory);
}
}
Service
消息生产者,注入redisTemplate,用convertAndSend发送消息
@Service
public class PublisherService {
@Autowired
private StringRedisTemplate redisTemplate;
public String sendMessage(String name) {
try {
redisTemplate.convertAndSend("TOPIC_USERNAME", name);
return "消息发送成功了";
} catch (Exception e) {
e.printStackTrace();
return "消息发送失败了";
}
}
}
Controller
请求时发送消息
@RestController
@RequestMapping("publisher")
public class PublisherController {
@Autowired
private PublisherService publisherService;
@RequestMapping("{name}")
public String sendMessage(@PathVariable("name") String name) {
return publisherService.sendMessage(name);
}
}
消费者
创建一个接收消息的类,可以继承MessageListener,也可以不继承
@Component
public class Receiver implements MessageListener {
private static Logger logger = LoggerFactory.getLogger(Receiver.class);
@Autowired
private StringRedisTemplate redisTemplate;
@Override
public void onMessage(Message message, byte[] pattern) {
RedisSerializer<String> valueSerializer = redisTemplate.getStringSerializer();
String deserialize = valueSerializer.deserialize(message.getBody());
logger.info("Received <" + message + ">");
}
}
@Component
public class Receiver {
private static final Logger logger = LoggerFactory.getLogger(Receiver.class);
public void receiveMessage(String message) {
logger.info("Received <" + message + ">");
}
}
消息订阅者配置类
@Configuration
@AutoConfigureAfter({Receiver.class})
public class SubscriberConfig {
/**
* 消息监听适配器,注入接受消息方法,输入方法名字 反射方法
*
* @param receiver
* @return
*/
@Bean
public MessageListenerAdapter getMessageListenerAdapter(Receiver receiver) {
return new MessageListenerAdapter(receiver, "receiveMessage"); //当没有继承MessageListener时需要写方法名字
}
/**
* 创建消息监听容器
*
* @param redisConnectionFactory
* @param messageListenerAdapter
* @return
*/
@Bean
public RedisMessageListenerContainer getRedisMessageListenerContainer(RedisConnectionFactory redisConnectionFactory, MessageListenerAdapter messageListenerAdapter) {
RedisMessageListenerContainer redisMessageListenerContainer = new RedisMessageListenerContainer();
redisMessageListenerContainer.setConnectionFactory(redisConnectionFactory);
redisMessageListenerContainer.addMessageListener(messageListenerAdapter, new PatternTopic("TOPIC_USERNAME"));
return redisMessageListenerContainer;
}
}
测试
由logger可以看出,接收者接收到了发送者的消息。