<?php
/**
 * Created by PhpStorm.
 * User: zn
 * Date: 2017/7/20
 * Time: 14:20
 */

namespace common\modules\safe;


use common\services\ResultStatusServices;
use common\services\StatusException;
use RedisLock\RedisLock;
use Yii;
use yii\base\Exception;

/**
 * 安全操作
 * Class SafeUtil
 * @package common\utils
 */
class SafeUtil
{
    /**
     * 数据库事务安全操作
     * @param callable $pFunc 要执行的方法
     * @param array $pParams
     * @return mixed
     * @throws Exception
     */
    public static function dbOperate($pFunc, $pParams)
    {
        //开启事务
        $dbTrans = Yii::$app->db->beginTransaction();

        try {

            $r = call_user_func_array($pFunc, $pParams);
            $success = true;

            return $r;

        } catch (Exception $e) {
            throw  $e;
        } finally {
            if (isset($success))
                $dbTrans->commit();
            else {
                $dbTrans->rollBack();

                //清除脏缓存数据
                Yii::$app->redis->clearDirtyKey();
            }
        }
    }

    /**
     * redis加锁操作
     * @param callable $pFunc
     * @param array $pParams
     * @param string $pLockKey
     * @param int $pWaitTime
     * @return mixed
     * @throws StatusException
     */
    public static function redisLockOperate($pFunc, $pParams, $pLockKey, $pWaitTime = 10)
    {
        if (empty($pLockKey)) throw new StatusException(ResultStatusServices::RS_REDIS_LOCK_KEY_EMPTY);

        //加锁
        $redisLock = new RedisLock(Yii::$app->redis, $pLockKey, RedisLock::FLAG_CATCH_EXCEPTIONS);
        if (!$redisLock->acquire($pWaitTime)) throw new StatusException(ResultStatusServices::RS_SAME_TIME_OPERATION);

        try {
            return call_user_func_array($pFunc, $pParams);
        } finally {
            //解锁
            $redisLock->release();
        }
    }
}