StringRedisTemplate 分布式锁

Mark一下 StringRedisTemplate 分布式锁 自用

1private static final String RELEASE_LOCK_SCRIPTS = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";
2
3@Resource(name = "stringRedisTemplate")
4private StringRedisTemplate stringRedisTemplate;
5
6public Boolean tryLock(String key,String requestId,int ttlSeconds){
7    return  stringRedisTemplate.opsForValue().setIfAbsent(key,requestId,(long)ttlSeconds, TimeUnit.SECONDS);
8}
9
10public boolean releaseLock(String key,String requestId){
11
12   // RedisScript<Long> redisScript = new DefaultRedisScript<>(RELEASE_LOCK_SCRIPTS);
13    DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>(RELEASE_LOCK_SCRIPTS,Long.class);
14    Long result = stringRedisTemplate.execute(redisScript, Arrays.asList(key), requestId);
15    if(result != null && result.intValue() == 1){
16        return true;
17    }
18
19    return false;
20}

1DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>(RELEASE_LOCK_SCRIPTS,Long.class);
2

这一句代码构造方法如果不加第二个参数，会报以下错误

1Unknown redis exception; nested exception is java.lang.IllegalStateException: io.lettuce.core.output.ValueOutput does not support set(long)

那么加上就可以了