(*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(); 
