laravel +redis 乐观锁自定义秒杀

<?php

namespace App\Http\Controllers;

use App\Models\Goods;
use App\Models\MsSkuStore;
use App\Models\Rtc;
use Facade\FlareClient\View;
use Illuminate\Http\Request;
use Illuminate\Http\ResponseTrait;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Redis;
use Volc\Service\Vod\Models\Request\VodGetPlayInfoRequest;
use Volc\Service\Vod\Models\Response\VodGetPlayInfoResponse;
use Volc\Service\Vod\Vod;


class TestController extends Controller
{
    public $user_num = 50;

    public function index(Request $request)
    {
        $uid = mt_rand(1, 9999);
//        $uid = $request->input('uid');
        $goods_id = 1;

        $key = 'sku_num_' . $goods_id;//商品库存key
        $key_user = 'key_user' . $goods_id;
        Redis::watch($key);
        //库存
        $store = Redis::get($key);
//        dd($store);
        //校验一个商品
        $key_user_exits = Redis::sismember($key_user, $uid);
        if ($key_user_exits) {
            return '用户已抢购该商品';
        }
        if ($store) {
            Redis::multi();
            Redis::decr($key);
            Redis::sadd($key_user, $uid);
            $res = Redis::exec();

            if ($res) {
                try {
                    DB::beginTransaction();
                    $sale = Goods::where('id', $goods_id)->value('sale');
                    Goods::where('id', $goods_id)->where('sale',$sale)->decrement('sku',1,['sale'=>DB::raw('sale + 1')]);
                    MsSkuStore::create([
                        'uid' => $uid,
                        'goods_id' => $goods_id
                    ]);
                    DB::commit();
                    return '成功';
                } catch (\Exception $e) {
                    DB::rollBack();
                    Log::info('抢购异常' . $e->getMessage());
                    return '抢购异常，请重试！';
                }

            } else {
                return '抢购失败，请重试！';
            }

        } else {

            return '商品已卖完';
        }

    }

    /**
     * 查看抢到结果
     */
    public function pushMs()
    {
        $uid  =mt_rand(100,9999);
        $goods_id  =1;
        $key = 'push_key_'.$goods_id;
        $key_user = 'key_user';
        $exists = Redis::sismember($key_user,$uid);
        if($exists){
            return '用户已经抢过';
        }
        $pop = Redis::rpop($key);
        if(!$pop){
            return '商品活动已结束';
        }
        Redis::sadd($key_user,$uid);
        $success = 'success_key';
        $content = '用户'.$uid.'成功抢到'.$goods_id.'商品数'.$pop;
        Redis::lpush($success,$content);

        try {
            DB::beginTransaction();
            $sale = Goods::where('id', $goods_id)->value('sale');
            Goods::where('id', $goods_id)->where('sale',$sale)->decrement('sku',1,['sale'=>DB::raw('sale + 1')]);
            MsSkuStore::create([
                'uid' => $uid,
                'goods_id' => $goods_id
            ]);
            DB::commit();
            return '成功';
        } catch (\Exception $e) {
            DB::rollBack();
            Log::info('抢购异常' . $e->getMessage());
            return '抢购异常，请重试！';
        }
    }

public function check()
{
    $uid  =mt_rand(100,9999);
    $goods_id  =1;

    $key = 'sku_'.$goods_id;//库存
    $store = Redis::get($key);
    if(!$store){
        return '活动已结束';
    }
    $key_success = 'success_is';
    $is_nx = Redis::setnx($key_success,1);
    if($is_nx){
        //入库
        Redis::decr($key);
        try{
            DB::beginTransaction();
            Goods::where('id',$goods_id)->decrement('sku',1,['sale'=>DB::raw('sale+1')]);
            MsSkuStore::create([
                'uid'=>$uid,
                'goods_id'=>$goods_id,
            ]);
            Redis::del($key_success);
            DB::commit();
            return '抢购成功';
        }catch (\Exception $e){
            Log::info('入库异常'.$e->getMessage());
            DB::rollBack();
            return '入库异常';
        }
    }else{
        '系统繁忙，请重试';
    }
}

}