八. .PHP模式设计企业模式(1)

(*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<?phpnamespace Woo\Command;include_once("./Woo/Controller/Request.php");//Command类  //* 命令对象拥有独立处理视图的功能abstract class Command{    //任何子类都无法覆盖该方法(永远无参数)    final function __construct(){}    //该方法传入一个Request对象,所以拥有访问请求数据的能力    function execute(\Woo\Controller\Request $request){        //可以做其他事情        //...        //再调用doExecute方法        $this->doExecute($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);} <?phpnamespace Woo\Command;include_once("./Woo/Controller/Request.php");include_once("./Woo/Command/DefaultCommand.php");//CommandResolver 命令解析器class CommandResolver{    private static $base_cmd;    private static $default_cmd;    function __construct(){        if(!self::$base_cmd){            self::$base_cmd=new \ReflectionClass("\Woo\Command\Command");            self::$default_cmd=new DefaultCommand();        }    }    function getCommand(\Woo\Controller\Request $request){        //指定需要调用的Command的key为cmd        $cmd=$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;        }    }}<?phpnamespace Woo\Command;include_once("./Woo/Controller/Request.php");include_once("./Woo/Command/Command.php");class DefaultCommand extends Command{    function doExecute(\Woo\Controller\Request $request){        $request->addFeedback("Welcome to WOO!");        $feedbacks=$request->getFeedback();        foreach ($feedbacks as $key=>$val){            print $val;            print "<br>";        }        include_once("Woo/View/main.html");    }}<?phpnamespace Woo\Command;include_once("./Woo/Controller/Request.php");include_once("./Woo/Command/Command.php");class MyCommand extends Command{    function doExecute(\Woo\Controller\Request $request){        $request->addFeedback("Welcome to WOO!");        $feedbacks=$request->getFeedback();        foreach ($feedbacks as $key=>$val){            print $val;            print "<br>";        }        $this->disPlay($request);    }}<?phpnamespace Woo\Base;include_once("./Woo/Base/Registry.php");//应用程序级别的注册表//*DNS Data Source Nameclass ApplicationRegistry extends Registry{    private static $instance;    private $freezedir='./Woo/Cache';    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.$key;        if(!is_dir($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);    }}<?phpnamespace Woo\Base;//创建一个具有作用域的注册表模式//请求级别注册表abstract class Registry{    abstract protected function get($key);    abstract protected function set($key,$val);}<?phpnamespace Woo\Base;include_once("./Woo/Base/Registry.php");include_once("./Woo/Controller/Request.php");//请求级别注册表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);    }}<?phpnamespace Woo\Base;include_once("./Woo/Base/Registry.php");//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);    }}<?phpnamespace Woo\Controller;include_once("./Woo/Base/ApplicationRegistry.php");//ApplicationHelper 应用助手类--负责读取配置文件数据,提供给客户端代码//*本类利用缓存机制,提高性能class ApplicationHelper{    private static $instance;    private $config="./Woo/Config/woo_options.xml";    //使用单例模式,用于获取配置    private function __construct(){}    static function instance(){        if(!self::$instance){            self::$instance=new self();        }        return self::$instance;    }    function init(){        //查看缓存数据是否存在        $dsn=\Woo\Base\ApplicationRegistry::getDSN();        if(!is_null($dsn)){            //$dsn不为空时直接返回            return;        }        $this->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);        }    }}<?phpnamespace Woo\Controller;class Complex{    }<?phpnamespace Woo\Controller;//引入所有需要的文件include_once("./Woo/Controller/ApplicationHelper.php");include_once("./Woo/Command/CommandResolver.php");include_once("./Woo/Command/Command.php");//Controller类class Controller{    private $applicationHelper;    private function __construct(){}    //该类只能通过run方法获得实例    static function run(){        $instance=new Controller();        //理论上讲init只需在应用程序第一次启动时调用        //(但是PHP属于解释型语言,所以每次都必须调用)        $instance->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);    }}<?phpnamespace Woo\Controller;include_once("./Woo/Base/RequestRegistry.php");//用于存储需要和视图层交换的数据class Request{    private $properties;    private $feedback=array();    function __construct(){        $this->init();        \Woo\Base\RequestRegistry::setRequest($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.xml<?xml version="1.0" encoding="UTF-8"?><data><dsn>dsn</dsn><dsn2>DSN</dsn2></data> //框架入口index.php<?phpuse Woo\Controller\Controller;include_once("./Woo/Controller/Controller.php");//print_r($_GET);//框架入口Controller::run();