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Spring boot+redis实现消息发布与订阅的代码

2020年06月23日  | 萬仟网IT编程  | 我要评论

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;
  .....................
}

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