ThinkPHP进程计数类Process用法实例详解

本文实例讲述了thinkphp进程计数类process用法。分享给大家供大家参考。具体如下：

项目中有一个需求：由于某一后台任务比较占带宽，所以要限制进程数。花了点时间，写了类，目前版本功能比较简单。

process.class.php文件如下：

<?php
/**
 * process 
 * 
 * @package 
 * @version $id$
 * @copyright 2005-2011 sucop.com
 * @author dijia huang <[e-mail]> 
 * @license php version 3.0 {@link http://www.php.net/license/3_0.txt}
 */
class process
{
  const process_key = '~process';
  const process_maxnum = 10;
  /**
   * start 
   * 
   * @static
   * @access public
   * @return void
   */
  static public function start(){
    $list = self::__getlist();
    $name = self::__getname();
    if(!isset($list[$name])){
      $list[$name] = array('count'=>1, 'lasttime'=>time());
    }else{
      if((time()-$list[$name]['time']) > 600){
        $list[$name]['count'] = 1;
      }else{
        $list[$name]['count'] += 1;
      }
    }
    self::__setlist($list);
  }
  /**
   * destory 
   * 
   * @static
   * @access public
   * @return void
   */
  static public function destory(){
    $list = self::__getlist();
    $name = self::__getname();
    if(isset($list[$name])){
      if($list[$name]['count'] <= 1){
        unset($list[$name]);
      }else{
        $list[$name]['count'] -= 1;
        $list[$name]['lasttime'] = time();
      }
      self::__setlist($list);
    }
  }
  /**
   * getcount 
   * 
   * @static
   * @access public
   * @return void
   */
  static public function getcount(){
    $list = self::__getlist();
    $name = self::__getname();
    return $list[$name]['count'];
  }
  /**
   * getmaxnum 
   * 
   * @static
   * @access public
   * @return void
   */
  static public function getmaxnum(){
    $name = self::__getname();
    return c($name) ? c($name) : self::process_maxnum;
  }
  /**
   * getname 
   * 
   * @static
   * @access public
   * @return void
   */
  static public function getname(){
    return self::__getname();
  }
  /**
   * isovertop 
   * 
   * @static
   * @access public
   * @return void
   */
  static public function isovertop(){
    return (self::getcount() > self::getmaxnum());
  }
  /**
   * getlasttime 
   * 
   * @static
   * @access public
   * @return void
   */
  static public function getlasttime(){
    $list = self::__getlist();
    $name = self::__getname();
    return $list[$name]['lasttime'];
  }
  /**
   * clear 
   * 
   * @static
   * @access public
   * @return void
   */
  static public function clear(){
    f(self::process_key, null);
  }
  /**
   * __setlist 
   * 
   * @param mixed $list 
   * @static
   * @access private
   * @return void
   */
  static private function __setlist($list=null){
    if(!is_array($list) || empty($list))
      f(self::process_key, null);
    else
      f(self::process_key, $list);
  }
  /**
   * __getlist 
   * 
   * @static
   * @access private
   * @return void
   */
  static private function __getlist(){
    $list = f(self::process_key);
    if(!is_array($list)) return array();
    else return $list;
  }
  /**
   * __getname 
   * 
   * @static
   * @access private
   * @return void
   */
  static private function __getname(){
    return (defined('group_name') ? group_name.'_' : '') . module_name . '_' . action_name;
  }
}
?>

调用方法：

<?php
class indexaction extends action 
{
  // 初始化模块
  public function _initialize(){
    parent::_initialize();
    import('@.util.process');
    process::start();
  }
  function __destruct(){
    process :: destory();
  } 
  public function index(){
    c('index_index', 3); // 动态更改限制数, 默认为10
    if(process::isovertop()) echo "超出限制";
    else "未超出限制";
  }
}
?>

希望本文所述对大家基于thinkphp框架的php程序设计有所帮助。