标签:factory struct stat tin 观察者模式 div his config 代理
$config = new \IMooc\Config(__DIR__.‘/configs‘);
var_dump($config[‘controller‘]);
<?php
namespace IMooc;
class Config implements \ArrayAccess
{
protected $path;
protected $configs = array();
function __construct($path)
{
$this->path = $path;
}
public function offsetExists($key)
{
return isset($this->configs[$key]);
}
public function offsetGet($key)
{
if (empty($this->configs[$key]))
{
$file_path = $this->path.‘/‘.$key.‘.php‘;
$config = require $file_path;
$this->configs[$key] = $config;
return $this->configs[$key];
}
}
public function offsetSet($Key, $value)
{
throw new \Exception("cannot write config file.");
}
public function offsetUnset($key)
{
unset($this->configs[$key]);
}
}<?php
namespace Configs;
$config = array(
‘home‘ => array(
‘decorator‘ => array(
‘IMooc\Decorator\Template‘,
),
),
‘default‘ => ‘hello world‘,
);
return $config;
2.在工厂方法中读取配置,生成可配置化的对象$db = \IMooc\Factory::getDatabase();
<?php
namespace IMooc;
class Factory
{
static function getDatabase($id = ‘master‘)
{
$key = ‘database_‘.$id;
if ($id == ‘slave‘)
{
$slaves = Application::getInstance()->config[‘database‘][‘slave‘];
$db_conf = $slaves[array_rand($slaves)];
}
else
{
$db_conf = Application::getInstance()->config[‘database‘][$id];
}
$db = Register::get($key);
if (!$db)
{
$db = new Database\MySQLi();
$db->connect($db_conf[‘host‘], $db_conf[‘user‘], $db_conf[‘password‘], $db_conf[‘dbname‘]);
Register::set($key, $db);
}
return $db;
}
}3.使用装饰器模式实现权限验证,模板渲染,JSON串化4.使用观察者模式实现数据更新事件的一系列更新操作5.使用代理模式实现数据的主从自动切换
标签:factory struct stat tin 观察者模式 div his config 代理
原文地址:http://www.cnblogs.com/phonecom/p/95374b19272382d44abf22d5c0c2fb45.html