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八..PHP模式设计企业模式(1)

时间:2021-07-01 10:21:17 帮助过:23人阅读

(*暂时未拆分前端控制器和应用控制器,全部集成在Command类实现)

1 注册表模式//注册表模式//注册表模式用于提供一个系统级别对象,在任何地方都方便访问(可以使用单例模式)class Registry{    private static $instance;    private $request;    private function __construct(){}    static function instance(){        if(!isset(self::$instance)){            self::$instance=new self();        }        return self::$instance;    }    function getRequest(){        $this->request;    }    function setRequest(Request $request){        $this->request=$request;    }}class Request{}  2 三种作用域下的注册表namespace woo\controller;class Request{}class Complex{}//创建一个具有作用域的注册表模式//请求级别注册表namespace woo\base;use woo;abstract class Registry{    abstract protected function get($key);    abstract protected function set($key,$val); }class RequestRegistry extends Registry{    private $values=array();    private static $instance;    private function __construct(){}    //返回唯一实例    static function instance(){        if(!isset(self::$instance)){            self::$instance=new self();        }        return self::$instance;    }    protected function get($key){        if(isset($this->values[$key])){            return isset($this->values[$key]);        }        return null;    }    protected function set($key, $val){        $this->values[$key]=$val;    }    static function getRequest(){        return self::instance()->get('request');    }    static function setRequest(woo\controller\Request $request){        return self::instance()->set('request', $request);    }}//会话级别的注册表class SessionRegistry extends Registry{    private static $instance;    private function __construct(){        session_start();    }    //返回唯一实例    static function instance(){        if(!isset(self::$instance)){            self::$instance=new self();        }        return self::$instance;    }    protected function get($key){        if( isset($_SESSION[__CLASS__][$key]) ){            return isset($_SESSION[__CLASS__][$key]);        }        return null;    }    protected function set($key, $val){        $_SESSION[__CLASS__][$key]=$val;    }    static function getComplex(){        return self::instance()->get('complex');    }    static function setRequest(woo\controller\Complex $request){        return self::instance()->set('complex', $request);    }}//应用程序级别的注册表class ApplicationRegistry extends Registry{    private static $instance;    private $freezedir='Data';    private $values=array();    private $mtimes=array();    private function __construct(){        session_start();    }    //返回唯一实例    static function instance(){        if(!isset(self::$instance)){            self::$instance=new self();        }        return self::$instance;    }    //get,set都是单独保存一个$key到文件中    protected function get($key){        $path=$this->freezedir.DIRECTORY_SEPARATOR.$key;        if(file_exists($path)){            clearstatcache();            //获取文件修改时间            $mtime=filemtime($path);            if(!isset($this->mtimes[$key])){                $this->mtimes[$key]=0;            }            //如果文件被修改            if($mtime > $this->mtimes[$key]){                $data=file_get_contents($path);                $this->mtimes[$key]=$mtime;                return ($this->values[$key]=unserialize($data));            }        }        if(isset($this->values[$key])){            return $this->values[$key];        }        return null;    }    protected function set($key, $val){        $this->values[$key]=$val;        $path=$this->freezedir.DIRECTORY_SEPARATOR.$key;        //文件不存在会自动创建        file_put_contents($path, serialize($val));        $this->mtimes[$key]=time();    }    static function getDSN(){        return self::$instance()->get('DSN');    }    static function setDSN($dsn){        return self::$instance()->set('DSN',$dsn);    }}3 前端控制器Controller----结合注册表模式与命令模式打造统一入口框架doExecute($request);    }    function disPlay($request){        //获取cmd,用于决定调取那个页面        $cmd=$request->getProperty('cmd');        //写法不是很好....截取command之前的字符        print $cmd;        $viewUrl="./Woo/View/".substr($cmd,0,strlen($cmd)-(7))."View.html";        include_once($viewUrl);    }    abstract function doExecute(\Woo\Controller\Request $request);} getProperty('cmd');        $sep=DIRECTORY_SEPARATOR;        //找不到指定cmd数据时,返回默认cmd实例        if(!$cmd){            return clone self::$default_cmd;        }        $cmd=str_replace(array('.',$sep), "", $cmd);        $filePath=".\Woo{$sep}Command{$sep}{$cmd}.php";        $className="\Woo\\Command\\{$cmd}";        if(file_exists($filePath)){            require_once("$filePath");            //判断传入的类是否存在,是否是base_cmd的子类            if(class_exists($className)){                $cmd_class=new \ReflectionClass($className);                if($cmd_class->isSubclassOf(self::$base_cmd)){                    return $cmd_class->newInstance();                }else{                    //解析失败,跳转到默认页面                    $request->addFeedback("command '$cmd' is not a command");                    return clone self::$default_cmd;                }            }        }else{            $request->addFeedback("command '$cmd' is not found");            return clone self::$default_cmd;        }    }}addFeedback("Welcome to WOO!");        $feedbacks=$request->getFeedback();        foreach ($feedbacks as $key=>$val){            print $val;            print "
"; } include_once("Woo/View/main.html"); }}addFeedback("Welcome to WOO!"); $feedbacks=$request->getFeedback(); foreach ($feedbacks as $key=>$val){ print $val; print "
"; } $this->disPlay($request); }}freezedir.DIRECTORY_SEPARATOR.$key; if(file_exists($path)){ clearstatcache(); //获取文件修改时间 $mtime=filemtime($path); if(!isset($this->mtimes[$key])){ $this->mtimes[$key]=0; } //如果文件被修改 if($mtime > $this->mtimes[$key]){ $data=file_get_contents($path); $this->mtimes[$key]=$mtime; return ($this->values[$key]=unserialize($data)); } } if(isset($this->values[$key])){ return $this->values[$key]; } return null; } protected function set($key, $val){ $this->values[$key]=$val; $path=$this->freezedir.DIRECTORY_SEPARATOR.$key; if(!is_dir($this->freezedir)){ mkdir($this->freezedir); } //文件不存在会自动创建 file_put_contents($path, serialize($val)); $this->mtimes[$key]=time(); } static function getDSN(){ return self::instance()->get('DSN'); } static function setDSN($dsn){ return self::instance()->set('DSN',$dsn); }}values[$key])){ return isset($this->values[$key]); } return null; } protected function set($key, $val){ $this->values[$key]=$val; } static function getRequest(){ return self::instance()->get('request'); } static function setRequest(\Woo\Controller\Request $request){ return self::instance()->set('request', $request); }}get('complex'); } static function setRequest(Woo\Controller\Complex $request){ return self::instance()->set('complex', $request); }}getOptions(); } //只有缓存数据不存在时才会调用该方法 private function getOptions(){ $this->ensure(file_exists($this->config), "Could not find options file!"); $options=simplexml_load_file($this->config); print get_class($options); $dsn=$options->dsn; $this->ensure($dsn, "No DSN found!"); //获取值之后,将其存放进应用程序级别注册表中,方便缓存使用 //先转化成数组,方便序列化 \Woo\Base\ApplicationRegistry::setDSN(array($dsn->__toString())); //设置其他值 //... } private function ensure($expr,$message){ if(!$expr){ throw new \Exception($message); } }}init(); //理论上讲handleRequest需要在每次请求到来时运行 $instance->handleRequest(); } function init(){ //获取一个单例,用于做全局配置 $applicationHelper=ApplicationHelper::instance(); $applicationHelper->init(); } //每次请求都需要调用一次 function handleRequest(){ $request=new Request(); $cmd_r=new \Woo\Command\CommandResolver(); //根据request生成对应command抽象类(接口)的子类实例 //之后要利用command执行相关动作 $cmd=$cmd_r->getCommand($request); $cmd->execute($request); }}init(); \Woo\Base\RequestRegistry::setRequest($this); } //同时支持HTTP请求和命令行参数(可用于调试程序使用) //*用于将参数填充进properties属性里 function init(){ //表单提交方式 if(isset($_SERVER['REQUEST_METHOD'])){ //用于收集表单提交的数据 $this->properties=$_REQUEST; return; } //$_SERVER['argv'] 传递给该脚本的参数 foreach ($_SERVER['argv'] as $arg){ //搜索字符串第一次出现的位置 if(strpos($arg, '=')){ list($key,$val)=explode("=", $arg); $this->setProperty($key,$val); } } } function getProperty($key){ if(isset($this->properties[$key])){ return $this->properties[$key]; } return null; } function setProperty($key,$val){ $this->properties[$key]=$val; } function addFeedback($msg){ array_push($this->feedback, $msg); } function getFeedback(){ return $this->feedback; } function getFeedbackString($separator="\n"){ return implode($separator,$this->feedback); }}//woo_options.xmldsnDSN //框架入口index.php

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