這篇文章主要介紹了thinkphp redis 佇列的實作程式碼,小編覺得蠻不錯的,現在分享給大家,也給大家做個參考。一起跟著小編過來看看吧
1,安裝Redis,依照自己的PHP版本安裝對應的redis擴充功能(此步驟簡單的描述一下)
1.1,安裝php_igbinary.dll, php_redis.dll擴充這裡需要注意你的php版本如圖:
1.2,php.ini檔案新增extension=php_igbinary.dll;extension=php_redis.dll兩處擴充
ok此處已經完成第一步redis環境建置完成看看phpinfo
專案中實際使用redis
#2.1,第一步設定redis參數如下,redis安裝的預設連接埠為6379:
<?php /* 数据库配置 */ return array( 'DATA_CACHE_PREFIX' => 'Redis_',//缓存前缀 'DATA_CACHE_TYPE'=>'Redis',//默认动态缓存为Redis 'DATA_CACHE_TIMEOUT' => false, 'REDIS_RW_SEPARATE' => true, //Redis读写分离 true 开启 'REDIS_HOST'=>'127.0.0.1', //redis服务器ip,多台用逗号隔开;读写分离开启时,第一台负责写,其它[随机]负责读; 'REDIS_PORT'=>'6379',//端口号 'REDIS_TIMEOUT'=>'300',//超时时间 'REDIS_PERSISTENT'=>false,//是否长连接 false=短连接 'REDIS_AUTH'=>'',//AUTH认证密码 ); ?>
2.2,實際函數中使用redis:
/** * redis连接 * @access private * @return resource * @author bieanju */ private function connectRedis(){ $redis=new \Redis(); $redis->connect(C("REDIS_HOST"),C("REDIS_PORT")); return $redis; }
2.3,秒殺的核心問題是在大並發的情況下不會超出庫存的購買,這個就是處理的關鍵所以思路是第一步在秒殺類的先做一些基礎的數據生成:
//现在初始化里面定义后边要使用的redis参数 public function _initialize(){ parent::_initialize(); $goods_id = I("goods_id",'0','intval'); if($goods_id){ $this->goods_id = $goods_id; $this->user_queue_key = "goods_".$goods_id."_user";//当前商品队列的用户情况 $this->goods_number_key = "goods".$goods_id;//当前商品的库存队列 } $this->user_id = $this->user_id ? $this->user_id : $_SESSION['uid']; }
2.4,第二步就是關鍵所在,用戶在進入商品詳情頁前先將當前商品的庫存進行隊列存入redis如下:
/** * 访问产品前先将当前产品库存队列 * @access public * @author bieanju */ public function _before_detail(){ $where['goods_id'] = $this->goods_id; $where['start_time'] = array("lt",time()); $where['end_time'] = array("gt",time()); $goods = M("goods")->where($where)->field('goods_num,start_time,end_time')->find(); !$goods && $this->error("当前秒杀已结束!"); if($goods['goods_num'] > $goods['order_num']){ $redis = $this->connectRedis(); $getUserRedis = $redis->hGetAll("{$this->user_queue_key}"); $gnRedis = $redis->llen("{$this->goods_number_key}"); /* 如果没有会员进来队列库存 */ if(!count($getUserRedis) && !$gnRedis){ for ($i = 0; $i < $goods['goods_num']; $i ++) { $redis->lpush("{$this->goods_number_key}", 1); } } $resetRedis = $redis->llen("{$this->goods_number_key}"); if(!$resetRedis){ $this->error("系统繁忙,请稍后抢购!"); } }else{ $this->error("当前产品已经秒杀完!"); } }
接下來要做的就是用ajax來異步的處理用戶點擊購買按鈕進行符合條件的資料進入購買的排隊佇列(如果目前使用者沒在目前產品使用者的佇列就進入排隊並且pop一個庫存佇列,如果在就拋出,):
/** * 抢购商品前处理当前会员是否进入队列 * @access public * @author bieanju */ public function goods_number_queue(){ !$this->user_id && $this->ajaxReturn(array("status" => "-1","msg" => "请先登录")); $model = M("flash_sale"); $where['goods_id'] = $this->goods_id; $goods_info = $model->where($where)->find(); !$goods_info && $this->error("对不起当前商品不存在或已下架!"); /* redis 队列 */ $redis = $this->connectRedis(); /* 进入队列 */ $goods_number_key = $redis->llen("{$this->goods_number_key}"); if (!$redis->hGet("{$this->user_queue_key}", $this->user_id)) { $goods_number_key = $redis->lpop("{$this->goods_number_key}"); } if($goods_number_key){ // 判断用户是否已在队列 if (!$redis->hGet("{$this->user_queue_key}", $this->user_id)) { // 插入抢购用户信息 $userinfo = array( "user_id" => $this->user_id, "create_time" => time() ); $redis->hSet("{$this->user_queue_key}", $this->user_id, serialize($userinfo)); $this->ajaxReturn(array("status" => "1")); }else{ $modelCart = M("cart"); $condition['user_id'] = $this->user_id; $condition['goods_id'] = $this->goods_id; $condition['prom_type'] = 1; $cartlist = $modelCart->where($condition)->count(); if($cartlist > 0){ $this->ajaxReturn(array("status" => "2")); }else{ $this->ajaxReturn(array("status" => "1")); } } }else{ $this->ajaxReturn(array("status" => "-1","msg" => "系统繁忙,请重试!")); } }
附加一個偵錯的函數,刪除指定佇列值:
public function clearRedis(){ set_time_limit(0); $redis = $this->connectRedis(); //$Rd = $redis->del("{$this->user_queue_key}"); $Rd = $redis->hDel("goods49",'用户id''); $a = $redis->hGet("goods_49_user", '用户id'); if(!$a){ dump($a); } if($Rd == 0){ exit("Redis队列已释放!"); } }
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