private static final Long SUCCESS = 1L;
/**
* 获取锁
* @param lockKey
* @param value
* @param expireTime：单位-秒
* @return
*/
public static boolean getLock(String lockKey, String value, int expireTime){
boolean ret = false;
try{
String script = "if redis.call('setNx',KEYS[1],ARGV[1])==1 then if redis.call('get',KEYS[1])==ARGV[1] then return redis.call('expire',KEYS[1],ARGV[2]) else return 0 end end";
RedisScript<String> redisScript = new DefaultRedisScript<>(script, String.class);
Object result = redisTemplate.execute(redisScript, Collections.singletonList(lockKey),value,expireTime);
if(SUCCESS.equals(result)){
return true;
}
}catch(Exception e){
}
return ret;
}
/**
* 释放锁
* @param lockKey
* @param value
* @return
*/
public static boolean releaseLock(String lockKey, String value){
String script = "if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end";
RedisScript<String> redisScript = new DefaultRedisScript<>(script, String.class);
Object result = redisTemplate.execute(redisScript, Collections.singletonList(lockKey),value);
if(SUCCESS.equals(result)) {
return true;
}
return false;
}
案例不支持redis cluster模式
