Spring boot+redis实现消息发布与订阅
一．创建spring boot项目
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.41</version>
</dependency>二．编辑yml配置文件
server:
port: 7888
# 日志配置
logging:
config: classpath:log/logback.xml
level:
cn.com.dhcc: info
org.springframework: info
org.springframework.web: info
com.alibaba.nacos.client.naming: error
spring:
redis:
host: localhost
port: 6379
password: *********
database: 1
jedis:
pool:
max-idle: 8
max-active: 8
max-wait: -1
min-idle: 0
timeout: 5000三．配置Redis
@Configuration
public class RedisConfiguration {
/**
* 实例化 RedisTemplate 对象
*
* @return
*/
@Bean("RedisTemplateS")
public RedisTemplate<String, Object> functionDomainRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
initDomainRedisTemplate(redisTemplate, redisConnectionFactory);
return redisTemplate;
}
/**
* 设置数据存入 redis 的序列化方式,并开启事务
*
* @param redisTemplate
* @param factory
*/
private void initDomainRedisTemplate(@Qualifier("RedisTemplateS") RedisTemplate<String, Object> redisTemplate, RedisConnectionFactory factory) {
// 如果不配置Serializer，那么存储的时候缺省使用String，如果用User类型存储，那么会提示错误User can't cast to
// String！
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
FastJsonRedisSerializer<Object> fastJsonRedisSerializer = new FastJsonRedisSerializer<Object>(Object.class);
redisTemplate.setHashValueSerializer(fastJsonRedisSerializer);
redisTemplate.setValueSerializer(fastJsonRedisSerializer);
//redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
//redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
// 开启事务
redisTemplate.setEnableTransactionSupport(true);
redisTemplate.setConnectionFactory(factory);
}
/**
* 注入封装RedisTemplate @Title: redisUtil @return RedisUtil @date
*
*/
@Bean(name = "redisUtils")
public RedisUtils redisUtil(@Qualifier("RedisTemplateS") RedisTemplate<String, Object> redisTemplate) {
RedisUtils redisUtil = new RedisUtils();
redisUtil.setRedisTemplate(redisTemplate);
return redisUtil;
}四．编写RedisUtil消息发布方法
public class RedisUtils {
private static final Logger log = LoggerFactory.getLogger(RedisUtils.class);
private RedisTemplate<String, Object> redisTemplate;
public void setRedisTemplate(RedisTemplate<String, Object> redisTemplate) {
this.redisTemplate = redisTemplate;
}
public void publish(String channal ,Object obj) {
redisTemplate.convertAndSend(channal,obj );
}
}五．配置消息监听
@Configuration
public class RedisMessageListener {
/**
* 创建连接工厂
* @param connectionFactory
* @param listenerAdapter
* @return
*/
@Bean
public RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory,
MessageListenerAdapter listenerAdapter,MessageListenerAdapter listenerAdapter2){
RedisMessageListenerContainer container = new RedisMessageListenerContainer();
container.setConnectionFactory(connectionFactory);
//接受消息的key
container.addMessageListener(listenerAdapter,new PatternTopic("phone"));
return container;
}
/**
* 绑定消息监听者和接收监听的方法
* @param receiver
* @return
*/
@Bean
public MessageListenerAdapter listenerAdapter(ReceiverRedisMessage receiver){
return new MessageListenerAdapter(receiver,"receiveMessage");
}
/**
* 注册订阅者
* @param latch
* @return
*/
@Bean
ReceiverRedisMessage receiver(CountDownLatch latch) {
return new ReceiverRedisMessage(latch);
}
/**
* 计数器，用来控制线程
* @return
*/
@Bean
public CountDownLatch latch(){
return new CountDownLatch(1);//指定了计数的次数 1
}
}六．消息订阅方法
public class ReceiverRedisMessage {
private static final Logger log = LoggerFactory.getLogger(ReceiverRedisMessage.class);
private CountDownLatch latch;
@Autowired
public ReceiverRedisMessage(CountDownLatch latch) {
this.latch = latch;
}
/**
* 队列消息接收方法
*
* @param jsonMsg
*/
public void receiveMessage(String jsonMsg) {
log.info("[开始消费REDIS消息队列phone数据...]");
try {
log.info("监听者收到消息：{}", jsonMsg);
JSONObject exJson = JSONObject.parseObject(jsonMsg);
User user = JSON.toJavaObject(exJson, User.class);
System.out.println("转化为对象 ："+user);
log.info("[消费REDIS消息队列phone数据成功.]");
} catch (Exception e) {
log.error("[消费REDIS消息队列phone数据失败，失败信息:{}]", e.getMessage());
}
latch.countDown();
}
}
七．定时消息发布测试
@EnableScheduling
@Component
public class PublisherController {
private static final Logger log = LoggerFactory.getLogger(PublisherController.class);
@Autowired
private RedisUtils redisUtils;
@Scheduled(fixedRate = 5000)
public String pubMsg() {
User user=new User(1, "尚***", 26,"男","陕西省xxxx市xxxxxx县");
redisUtils.publish("phone", user);
log.info("Publisher sendes Topic... ");
return "success";
}
}八．测试结果
九．发布对象User实体
public class User implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private int id;
private String name;
private int age;
private String sex;
private String address;
.....................
}
