PHP使用Redis队列执行定时任务实例讲解

?php
  namespace Utils;

  use Phalcon\Config\Adapter\Ini as ConfigIni;

  class Redis{
    private static $redis1;
    private static $session;

    /**
     * 获取一个单例的redis对象
     * @param string $name
     * @return \Redis
     */
    public static function getObj($name='redis1')
    {
      try{
        if(!empty(self::$$name)){
          return self::$$name;
        }
        $config = new ConfigIni(APP_PATH."/config".ENV."/redis.ini");
        self::$$name = new \Redis();
        self::$$name->connect($config[$name]['host'], $config[$name]['port'],2);
        if(isset($config[$name]['password'])  !empty($config[$name]['password'])){
          self::$$name->auth($config[$name]['password']);
        
        }
        self::$$name->select($config[$name]['database']);
      }catch (\Exception $exception){
        self::$$name = false;
      }
      return self::$$name;

    }


  };

  /**
   * 订单任务
   */
  public function orderAction()
  {
    error_reporting(E_ALL  ~E_NOTICE);
    $redis = Redis::getObj();
    //获取数据库连接实例
    $db = $this->getDI()->getShared('db');
    while (true) {
      print_r(' -start- ');
      $order_status = 1;
      file_put_contents(APP_PATH . "/../domain_order.log", time());
      try {
      	//防止长时间无任务导致MySQL超时
        $db->query("select 1");
        //出列
        $order_info = $redis->lPop('order');
        if (!$order_info) {//队列为空时暂停
          echo ' -empty- ';
          sleep(1);
          continue;
        }
        $order_info = json_decode($order_info, true);
        $model_order_info = NetUserOrder::findFirst(['order_sn = :order_sn:','bind'=>['order_sn'=>$order_domain_info_save->order_sn]]);
        //未支付
        if($model_order_info->pay_status != 200){
          echo 'no pay';
          continue;
        }
        //已操作
        if ($order_domain_info_save->order_status == 3) {
          echo ' -Operated- ';
          continue;
        }
        //事务开始
        $db->begin();
        ##
        这里执行订单流程操作
        ##

        $order_status = 3;//操作成功

        //修改订单状态
        $order_domain_info_save->order_status = $order_status;
        $order_domain_info_save->operation_time = time();
        $order_domain_info_save->update();
        }

        //提交事务
        $db->commit();
        printf('### succ order_id' . $order_info['id'] . ' ###');
      } catch (\Exception $e) {
        //回滚事务
        $db->rollback();
        $order_status = 2;//操作失败

        $order_domain_info_save->order_status = $order_status;
        $order_domain_info_save->operation_time = time();
        $order_domain_info_save->update();

        printf(' error ' . $e->getMessage() . ' ');
        //异常,发送通知
        Log::error($e->getMessage());
          $redis->hSet('order_domain_retry', 'domain_retry_' . $order_info['id'], json_encode($order_info));
      }

//队列第一个 =>出列
$Redis->lPop($key);
//入到 =>队列最后
$Redis->rPush($key);


//队列最后一个 =>出列
$Redis->rPop($key);
//入到 =>队列第一个
$Redis->rPop($key);

//返回整个列表的值，不出列
$redis->lRange($key,0,-1);