关于基于redis实现分布式锁之lua脚本优化所出现的bug

io.lettuce.core.RedisCommandExecutionException: ERR Error compiling script (new function): user_script:1: 'end' expected near 'elsereturn' 
 

 //释放锁
            String script = "if redis.call('get',KEYS[1]) == ARGV[1] " +
                    "then " +
                    "return redis.call('del',KEYS[1]) " +
                    "else" +
                    "return 0 " +
                    "end";
            this.redisTemplate.execute(new DefaultRedisscript<>(script), Arrays.asList("lock"), uuid);

在这里需要加入返回结果集类型,虽然不需要但是必须指定.否则会报错

this.redisTemplate.execute(new DefaultRedisscript<>(script,Boolean.class), Arrays.asList("lock"), uuid);

加入lua脚本后可以保证原子性和防误删