使用Redisson实现分布式锁最佳实践

废话不多说，直接上代码，企业级拿来即用。
分布式锁组件共5个类，代码结构：

说明：

1. RedissonConnector： 分布式锁客户端配置类。
2. RedissonLocker： 分布式锁的工作类。
3. RedissonLockWorker： 获取锁后的处理类。
4. RedissonLockService： 分布式锁的接口类。
5. RedissonLockException： 分布式锁异常类。

各个类详细内容：

1. package com.**.lock;
   
   import org.redisson.Redisson;
   import org.redisson.api.RedissonClient;
   import org.redisson.config.Config;
   import org.springframework.beans.factory.annotation.Value;
   import org.springframework.stereotype.Component;
   
   import javax.annotation.PostConstruct;
   
   /**
    * @author yuan
    * redisson client连接类
    */
   @Component
   public class RedissonConnector {
   
       @Value("${redis.host}")
       private String host;
       @Value("${redis.port}")
       private String port;
       @Value("${redis.password}")
       private String password;
   
       private RedissonClient redissonClient;
   
       @PostConstruct
       public void init() {
           Config config = new Config();
           config.useSingleServer().setAddress(host + ":" + port).setPassword(password);
           redissonClient = Redisson.create(config);
       }
   
       RedissonClient getRedissonClient() {
           return redissonClient;
       }
   
   }
   

    

2. package com.**.lock;
   
   import com.msunsoft.utils.RedistUtil;
   import org.redisson.api.RLock;
   import org.redisson.api.RedissonClient;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.stereotype.Component;
   
   import java.util.concurrent.TimeUnit;
   
   /**
    * @author yuan
    * redisson锁工作类
    */
   @Component
   public class RedissonLocker implements RedissonLockService {
   
       private final RedissonConnector connector;
   
       @Autowired
       public RedissonLocker(RedissonConnector connector) {
           this.connector = connector;
       }
   
       @Override
       public boolean lock(String sourceName) throws Exception {
           RLock rLock = this.getLock(RedistUtil.lock_prefix + sourceName);
           //尝试加锁，最多等待60秒，加锁lockTime以后自动解锁
           return rLock.tryLock(60, RedistUtil.lock_expire, TimeUnit.SECONDS);
       }
   
       @Override
       public  T lock(String sourceName, RedissonLockWorker worker) throws Exception {
           return lock(sourceName, worker, RedistUtil.lock_expire);
       }
   
       @Override
       public  T lock(String sourceName, RedissonLockWorker worker, int lockTime) throws Exception {
           RLock rLock = this.getLock(RedistUtil.lock_prefix + sourceName);
           //尝试加锁，最多等待60秒，加锁lockTime以后自动解锁
           boolean success = rLock.tryLock(60, lockTime, TimeUnit.SECONDS);
           if (success) {
               try {
                   return worker.afterLockSuccess();
               } finally {
                   rLock.unlock();
               }
           }
           throw new RedissonLockException();
       }
   
       @Override
       public void unLock(String sourceName) {
           RLock rLock = this.getLock(RedistUtil.lock_prefix + sourceName);
           rLock.unlock();
       }
   
       /**
        * 获取锁
        */
       private RLock getLock(String name) {
           RedissonClient client = connector.getRedissonClient();
           return client.getLock(name);
       }
   }
   

    

3. package com.**.lock;
   
   /**
    * @author yuan
    * 获取锁后处理类
    */
   public interface RedissonLockWorker {
   
       /**
        * 获取锁成功后执行业务逻辑
        * @return 业务逻辑对象
        * @throws Exception 异常信息
        */
       T afterLockSuccess() throws Exception;
   
   
   }
   

    

4. package com.**.lock;
   
   /**
    * @author yuan
    * 锁管理类
    */
   public interface RedissonLockService {
   
       /**
        * 加锁
        * @param sourceName 资源名称
        * @return 处理完业务逻辑后返回的数据
        * @throws Exception 异常
        */
       boolean lock(String sourceName) throws Exception;
   
       /**
        * 加锁
        * @param sourceName 资源名称
        * @param worker 获取锁后工作类
        * @return 处理完业务逻辑后返回的数据
        * @throws Exception 异常
        */
        T lock(String sourceName, RedissonLockWorker worker) throws Exception;
   
       /**
        * 加锁
        * @param sourceName 资源名称
        * @param worker 获取锁后工作类
        * @param lockTime 锁超时时间
        * @return 处理完业务逻辑后返回的数据
        * @throws Exception 异常
        */
        T lock(String sourceName, RedissonLockWorker worker, int lockTime) throws Throwable;
   
       /**
        * 锁释放
        * @param sourceName 资源名称
        */
       void unLock(String sourceName);
   }
   

    

5. package com.**.lock;
   
   /**
    * @author yuan
    * 锁异常类
    */
   public class RedissonLockException extends RuntimeException {
       public RedissonLockException() {
       }
   
       public RedissonLockException(String message) {
           super(message);
       }
   }
   

    

6. @Autowired
   private RedissonLockService redissonLockService;
   
   @RequestMapping("/wechat/submitEvalInfo")
   public Result submitEvalInfo(@RequestBody List evalList) throws Exception {
           TokenUser user = ThreadContext.get();
           try {
               //sourceName随意，只要保证一定时间内唯一就行
               return redissonLockService.lock(user.getLoginName() + "submitEvalInfo",
                       () -> questionnaireService.submitEvalInfo(evalList, user));
           } catch (UnsupportedEncodingException e) {
               return Result.fail("数据解码失败，请联系运营平台开发人员解决");
           }
       }