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);