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這篇文章主要介紹如何實(shí)現(xiàn)thinkphp+redis+隊(duì)列示例,文中介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們一定要看完!
1,安裝Redis,根據(jù)自己的PHP版本安裝對應(yīng)的redis擴(kuò)展(此步驟簡單的描述一下)
1.1,安裝 php_igbinary.dll,php_redis.dll擴(kuò)展此處需要注意你的php版本如圖:
1.2,php.ini文件新增 extension=php_igbinary.dll;extension=php_redis.dll兩處擴(kuò)展
ok此處已經(jīng)完成第一步redis環(huán)境搭建完成看看phpinfo
項(xiàng)目中實(shí)際使用redis
2.1,第一步配置redis參數(shù)如下,redis安裝的默認(rèn)端口為6379:
<?php /* 數(shù)據(jù)庫配置 */ return array( 'DATA_CACHE_PREFIX' => 'Redis_',//緩存前綴 'DATA_CACHE_TYPE'=>'Redis',//默認(rèn)動(dòng)態(tài)緩存為Redis 'DATA_CACHE_TIMEOUT' => false, 'REDIS_RW_SEPARATE' => true, //Redis讀寫分離 true 開啟 'REDIS_HOST'=>'127.0.0.1', //redis服務(wù)器ip,多臺(tái)用逗號(hào)隔開;讀寫分離開啟時(shí),第一臺(tái)負(fù)責(zé)寫,其它[隨機(jī)]負(fù)責(zé)讀; 'REDIS_PORT'=>'6379',//端口號(hào) 'REDIS_TIMEOUT'=>'300',//超時(shí)時(shí)間 'REDIS_PERSISTENT'=>false,//是否長連接 false=短連接 'REDIS_AUTH'=>'',//AUTH認(rèn)證密碼 ); ?>
2.2,實(shí)際函數(shù)中使用redis:
/** * redis連接 * @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并發(fā)的情況下不會(huì)超出庫存的購買,這個(gè)就是處理的關(guān)鍵所以思路是第一步在秒殺類的先做一些基礎(chǔ)的數(shù)據(jù)生成:
//現(xiàn)在初始化里面定義后邊要使用的redis參數(shù) 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";//當(dāng)前商品隊(duì)列的用戶情況 $this->goods_number_key = "goods".$goods_id;//當(dāng)前商品的庫存隊(duì)列 } $this->user_id = $this->user_id ? $this->user_id : $_SESSION['uid']; }
2.4,第二步就是關(guān)鍵所在,用戶在進(jìn)入商品詳情頁前先將當(dāng)前商品的庫存進(jìn)行隊(duì)列存入redis如下:
/** * 訪問產(chǎn)品前先將當(dāng)前產(chǎn)品庫存隊(duì)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 && $this->error("當(dāng)前秒殺已結(jié)束!"); if($goods['goods_num'] > $goods['order_num']){ $redis = $this->connectRedis(); $getUserRedis = $redis->hGetAll("{$this->user_queue_key}"); $gnRedis = $redis->llen("{$this->goods_number_key}"); /* 如果沒有會(huì)員進(jìn)來隊(duì)列庫存 */ 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("系統(tǒng)繁忙,請稍后搶購!"); } }else{ $this->error("當(dāng)前產(chǎn)品已經(jīng)秒殺完!"); } }
接下來要做的就是用ajax來異步的處理用戶點(diǎn)擊購買按鈕進(jìn)行符合條件的數(shù)據(jù)進(jìn)入購買的排隊(duì)隊(duì)列(如果當(dāng)前用戶沒在當(dāng)前產(chǎn)品用戶的隊(duì)列就進(jìn)入排隊(duì)并且pop一個(gè)庫存隊(duì)列,如果在就拋出,):
/** * 搶購商品前處理當(dāng)前會(huì)員是否進(jìn)入隊(duì)列 * @access public * @author bieanju */ public function goods_number_queue(){ !$this->user_id && $this->ajaxReturn(array("status" => "-1","msg" => "請先登錄")); $model = M("flash_sale"); $where['goods_id'] = $this->goods_id; $goods_info = $model->where($where)->find(); !$goods_info && $this->error("對不起當(dāng)前商品不存在或已下架!"); /* redis 隊(duì)列 */ $redis = $this->connectRedis(); /* 進(jìn)入隊(duì)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($goods_number_key){ // 判斷用戶是否已在隊(duì)列 if (!$redis->hGet("{$this->user_queue_key}", $this->user_id)) { // 插入搶購用戶信息 $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" => "系統(tǒng)繁忙,請重試!")); } }
附加一個(gè)調(diào)試的函數(shù),刪除指定隊(duì)列值:
public function clearRedis(){ set_time_limit(0); $redis = $this->connectRedis(); //$Rd = $redis->del("{$this->user_queue_key}"); $Rd = $redis->hDel("goods49",'用戶id''); $a = $redis->hGet("goods_49_user", '用戶id'); if(!$a){ dump($a); } if($Rd == 0){ exit("Redis隊(duì)列已釋放!"); } }
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