PHP使用Redis队列执行定时任务实例讲解

Redis类：

<?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;

    }


  };

定时任务：

  /**
   * 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));
      }

Redis常用队列方法：

//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);