import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.stereotype.Component;
import redis.clients.jedis.Protocol;
import redis.clients.util.SafeEncoder;

import java.io.Serializable;


@Component
public class RedisUtils {

  @Autowired
  private RedisTemplate redisTemplate;

  public RedisTemplate getRedisTemplate() {
    return this.redisTemplate;
  }

  /**
   * 设置redis分布式锁
   * @param key
   * @param value
   * @param expire 锁过期时间
   * @return
   */
  public boolean tryLock(final String key, final Serializable value, final long expire){
    boolean isSuccess = (boolean) redisTemplate.execute((RedisCallback) connection -> {
      RedisSerializer valueSerializer = redisTemplate.getValueSerializer();
      RedisSerializer keySerializer = redisTemplate.getKeySerializer();
      Object object = connection.execute("set",keySerializer.serialize(key),valueSerializer.serialize(value), SafeEncoder.encode("NX"),SafeEncoder.encode("EX"), Protocol.toByteArray(expire));
      return null != object;
    });
    return isSuccess;
  }
　　//释放锁
  public boolean releaseLock(String key){
    return redisTemplate.delete(key);
  }
}