diff --git a/framework/base/Application.php b/framework/base/Application.php
new file mode 100644
index 0000000..ccc283c
--- /dev/null
+++ b/framework/base/Application.php
@@ -0,0 +1,965 @@
+<?php
+/**
+ * Application class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2012 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+/**
+ * Application is the base class for all application classes.
+ *
+ * An application serves as the global context that the user request
+ * is being processed. It manages a set of application components that
+ * provide specific functionalities to the whole application.
+ *
+ * The core application components provided by Application are the following:
+ * <ul>
+ * <li>{@link getErrorHandler errorHandler}: handles PHP errors and
+ *   uncaught exceptions. This application component is dynamically loaded when needed.</li>
+ * <li>{@link getSecurityManager securityManager}: provides security-related
+ *   services, such as hashing, encryption. This application component is dynamically
+ *   loaded when needed.</li>
+ * <li>{@link getStatePersister statePersister}: provides global state
+ *   persistence method. This application component is dynamically loaded when needed.</li>
+ * <li>{@link getCache cache}: provides caching feature. This application component is
+ *   disabled by default.</li>
+ * <li>{@link getMessages messages}: provides the message source for translating
+ *   application messages. This application component is dynamically loaded when needed.</li>
+ * <li>{@link getCoreMessages coreMessages}: provides the message source for translating
+ *   Yii framework messages. This application component is dynamically loaded when needed.</li>
+ * </ul>
+ *
+ * Application will undergo the following lifecycles when processing a user request:
+ * <ol>
+ * <li>load application configuration;</li>
+ * <li>set up class autoloader and error handling;</li>
+ * <li>load static application components;</li>
+ * <li>{@link onBeginRequest}: preprocess the user request;</li>
+ * <li>{@link processRequest}: process the user request;</li>
+ * <li>{@link onEndRequest}: postprocess the user request;</li>
+ * </ol>
+ *
+ * Starting from lifecycle 3, if a PHP error or an uncaught exception occurs,
+ * the application will switch to its error handling logic and jump to step 6 afterwards.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ *
+ * @property string $basePath Returns the root path of the application.
+ * @property CCache $cache Returns the cache component.
+ * @property CPhpMessageSource $coreMessages Returns the core message translations.
+ * @property CDateFormatter $dateFormatter Returns the locale-dependent date formatter.
+ * @property CDbConnection $db Returns the database connection component.
+ * @property CErrorHandler $errorHandler Returns the error handler component.
+ * @property string $extensionPath Returns the root directory that holds all third-party extensions.
+ * @property string $id Returns the unique identifier for the application.
+ * @property string $language Returns the language that the user is using and the application should be targeted to.
+ * @property CLocale $locale Returns the locale instance.
+ * @property string $localeDataPath Returns the directory that contains the locale data.
+ * @property CMessageSource $messages Returns the application message translations component.
+ * @property CNumberFormatter $numberFormatter The locale-dependent number formatter.
+ * @property CHttpRequest $request Returns the request component.
+ * @property string $runtimePath Returns the directory that stores runtime files.
+ * @property CSecurityManager $securityManager Returns the security manager component.
+ * @property CStatePersister $statePersister Returns the state persister component.
+ * @property string $timeZone Returns the time zone used by this application.
+ * @property CUrlManager $urlManager Returns the URL manager component.
+ * @property string $baseUrl Returns the relative URL for the application
+ * @property string $homeUrl the homepage URL
+ */
+abstract class Application extends Module
+{
+	/**
+	 * @var string the application name. Defaults to 'My Application'.
+	 */
+	public $name = 'My Application';
+	/**
+	 * @var string the charset currently used for the application. Defaults to 'UTF-8'.
+	 */
+	public $charset = 'UTF-8';
+	/**
+	 * @var string the language that the application is written in. This mainly refers to
+	 * the language that the messages and view files are in. Defaults to 'en_us' (US English).
+	 */
+	public $sourceLanguage = 'en_us';
+
+	private $_id;
+	private $_basePath;
+	private $_runtimePath;
+	private $_extensionPath;
+	private $_globalState;
+	private $_stateChanged;
+	private $_ended = false;
+	private $_language;
+	private $_homeUrl;
+
+	/**
+	 * Processes the request.
+	 * This is the place where the actual request processing work is done.
+	 * Derived classes should override this method.
+	 */
+	abstract public function processRequest();
+
+	/**
+	 * Constructor.
+	 * @param mixed $config application configuration.
+	 * If a string, it is treated as the path of the file that contains the configuration;
+	 * If an array, it is the actual configuration information.
+	 * Please make sure you specify the {@link getBasePath basePath} property in the configuration,
+	 * which should point to the directory containing all application logic, template and data.
+	 * If not, the directory will be defaulted to 'protected'.
+	 */
+	public function __construct($config = null)
+	{
+		Yii::setApplication($this);
+
+		// set basePath at early as possible to avoid trouble
+		if (is_string($config))
+			$config = require($config);
+		if (isset($config['basePath']))
+		{
+			$this->setBasePath($config['basePath']);
+			unset($config['basePath']);
+		}
+		else
+			$this->setBasePath('protected');
+		Yii::setPathOfAlias('application', $this->getBasePath());
+		Yii::setPathOfAlias('webroot', dirname($_SERVER['SCRIPT_FILENAME']));
+		Yii::setPathOfAlias('ext', $this->getBasePath() . DIRECTORY_SEPARATOR . 'extensions');
+
+		$this->preinit();
+
+		$this->initSystemHandlers();
+		$this->registerCoreComponents();
+
+		$this->configure($config);
+		$this->attachBehaviors($this->behaviors);
+		$this->preloadComponents();
+
+		$this->init();
+	}
+
+
+	/**
+	 * Runs the application.
+	 * This method loads static application components. Derived classes usually overrides this
+	 * method to do more application-specific tasks.
+	 * Remember to call the parent implementation so that static application components are loaded.
+	 */
+	public function run()
+	{
+		if ($this->hasEventHandler('onBeginRequest'))
+			$this->onBeginRequest(new CEvent($this));
+		$this->processRequest();
+		if ($this->hasEventHandler('onEndRequest'))
+			$this->onEndRequest(new CEvent($this));
+	}
+
+	/**
+	 * Terminates the application.
+	 * This method replaces PHP's exit() function by calling
+	 * {@link onEndRequest} before exiting.
+	 * @param integer $status exit status (value 0 means normal exit while other values mean abnormal exit).
+	 * @param boolean $exit whether to exit the current request. This parameter has been available since version 1.1.5.
+	 * It defaults to true, meaning the PHP's exit() function will be called at the end of this method.
+	 */
+	public function end($status = 0, $exit = true)
+	{
+		if ($this->hasEventHandler('onEndRequest'))
+			$this->onEndRequest(new CEvent($this));
+		if ($exit)
+			exit($status);
+	}
+
+	/**
+	 * Raised right BEFORE the application processes the request.
+	 * @param CEvent $event the event parameter
+	 */
+	public function onBeginRequest($event)
+	{
+		$this->raiseEvent('onBeginRequest', $event);
+	}
+
+	/**
+	 * Raised right AFTER the application processes the request.
+	 * @param CEvent $event the event parameter
+	 */
+	public function onEndRequest($event)
+	{
+		if (!$this->_ended)
+		{
+			$this->_ended = true;
+			$this->raiseEvent('onEndRequest', $event);
+		}
+	}
+
+	/**
+	 * Returns the unique identifier for the application.
+	 * @return string the unique identifier for the application.
+	 */
+	public function getId()
+	{
+		if ($this->_id !== null)
+			return $this->_id;
+		else
+			return $this->_id = sprintf('%x', crc32($this->getBasePath() . $this->name));
+	}
+
+	/**
+	 * Sets the unique identifier for the application.
+	 * @param string $id the unique identifier for the application.
+	 */
+	public function setId($id)
+	{
+		$this->_id = $id;
+	}
+
+	/**
+	 * Returns the root path of the application.
+	 * @return string the root directory of the application. Defaults to 'protected'.
+	 */
+	public function getBasePath()
+	{
+		return $this->_basePath;
+	}
+
+	/**
+	 * Sets the root directory of the application.
+	 * This method can only be invoked at the begin of the constructor.
+	 * @param string $path the root directory of the application.
+	 * @throws CException if the directory does not exist.
+	 */
+	public function setBasePath($path)
+	{
+		if (($this->_basePath = realpath($path)) === false || !is_dir($this->_basePath))
+			throw new CException(Yii::t('yii', 'Application base path "{path}" is not a valid directory.',
+				array('{path}' => $path)));
+	}
+
+	/**
+	 * Returns the directory that stores runtime files.
+	 * @return string the directory that stores runtime files. Defaults to 'protected/runtime'.
+	 */
+	public function getRuntimePath()
+	{
+		if ($this->_runtimePath !== null)
+			return $this->_runtimePath;
+		else
+		{
+			$this->setRuntimePath($this->getBasePath() . DIRECTORY_SEPARATOR . 'runtime');
+			return $this->_runtimePath;
+		}
+	}
+
+	/**
+	 * Sets the directory that stores runtime files.
+	 * @param string $path the directory that stores runtime files.
+	 * @throws CException if the directory does not exist or is not writable
+	 */
+	public function setRuntimePath($path)
+	{
+		if (($runtimePath = realpath($path)) === false || !is_dir($runtimePath) || !is_writable($runtimePath))
+			throw new CException(Yii::t('yii', 'Application runtime path "{path}" is not valid. Please make sure it is a directory writable by the Web server process.',
+				array('{path}' => $path)));
+		$this->_runtimePath = $runtimePath;
+	}
+
+	/**
+	 * Returns the root directory that holds all third-party extensions.
+	 * @return string the directory that contains all extensions. Defaults to the 'extensions' directory under 'protected'.
+	 */
+	public function getExtensionPath()
+	{
+		return Yii::getPathOfAlias('ext');
+	}
+
+	/**
+	 * Sets the root directory that holds all third-party extensions.
+	 * @param string $path the directory that contains all third-party extensions.
+	 */
+	public function setExtensionPath($path)
+	{
+		if (($extensionPath = realpath($path)) === false || !is_dir($extensionPath))
+			throw new CException(Yii::t('yii', 'Extension path "{path}" does not exist.',
+				array('{path}' => $path)));
+		Yii::setPathOfAlias('ext', $extensionPath);
+	}
+
+	/**
+	 * Returns the language that the user is using and the application should be targeted to.
+	 * @return string the language that the user is using and the application should be targeted to.
+	 * Defaults to the {@link sourceLanguage source language}.
+	 */
+	public function getLanguage()
+	{
+		return $this->_language === null ? $this->sourceLanguage : $this->_language;
+	}
+
+	/**
+	 * Specifies which language the application is targeted to.
+	 *
+	 * This is the language that the application displays to end users.
+	 * If set null, it uses the {@link sourceLanguage source language}.
+	 *
+	 * Unless your application needs to support multiple languages, you should always
+	 * set this language to null to maximize the application's performance.
+	 * @param string $language the user language (e.g. 'en_US', 'zh_CN').
+	 * If it is null, the {@link sourceLanguage} will be used.
+	 */
+	public function setLanguage($language)
+	{
+		$this->_language = $language;
+	}
+
+	/**
+	 * Returns the time zone used by this application.
+	 * This is a simple wrapper of PHP function date_default_timezone_get().
+	 * @return string the time zone used by this application.
+	 * @see http://php.net/manual/en/function.date-default-timezone-get.php
+	 * @since 1.0.9
+	 */
+	public function getTimeZone()
+	{
+		return date_default_timezone_get();
+	}
+
+	/**
+	 * Sets the time zone used by this application.
+	 * This is a simple wrapper of PHP function date_default_timezone_set().
+	 * @param string $value the time zone used by this application.
+	 * @see http://php.net/manual/en/function.date-default-timezone-set.php
+	 * @since 1.0.9
+	 */
+	public function setTimeZone($value)
+	{
+		date_default_timezone_set($value);
+	}
+
+	/**
+	 * Returns the localized version of a specified file.
+	 *
+	 * The searching is based on the specified language code. In particular,
+	 * a file with the same name will be looked for under the subdirectory
+	 * named as the locale ID. For example, given the file "path/to/view.php"
+	 * and locale ID "zh_cn", the localized file will be looked for as
+	 * "path/to/zh_cn/view.php". If the file is not found, the original file
+	 * will be returned.
+	 *
+	 * For consistency, it is recommended that the locale ID is given
+	 * in lower case and in the format of LanguageID_RegionID (e.g. "en_us").
+	 *
+	 * @param string $srcFile the original file
+	 * @param string $srcLanguage the language that the original file is in. If null, the application {@link sourceLanguage source language} is used.
+	 * @param string $language the desired language that the file should be localized to. If null, the {@link getLanguage application language} will be used.
+	 * @return string the matching localized file. The original file is returned if no localized version is found
+	 * or if source language is the same as the desired language.
+	 */
+	public function findLocalizedFile($srcFile, $srcLanguage = null, $language = null)
+	{
+		if ($srcLanguage === null)
+			$srcLanguage = $this->sourceLanguage;
+		if ($language === null)
+			$language = $this->getLanguage();
+		if ($language === $srcLanguage)
+			return $srcFile;
+		$desiredFile = dirname($srcFile) . DIRECTORY_SEPARATOR . $language . DIRECTORY_SEPARATOR . basename($srcFile);
+		return is_file($desiredFile) ? $desiredFile : $srcFile;
+	}
+
+	/**
+	 * Returns the locale instance.
+	 * @param string $localeID the locale ID (e.g. en_US). If null, the {@link getLanguage application language ID} will be used.
+	 * @return CLocale the locale instance
+	 */
+	public function getLocale($localeID = null)
+	{
+		return CLocale::getInstance($localeID === null ? $this->getLanguage() : $localeID);
+	}
+
+	/**
+	 * Returns the directory that contains the locale data.
+	 * @return string the directory that contains the locale data. It defaults to 'framework/i18n/data'.
+	 * @since 1.1.0
+	 */
+	public function getLocaleDataPath()
+	{
+		return CLocale::$dataPath === null ? Yii::getPathOfAlias('system.i18n.data') : CLocale::$dataPath;
+	}
+
+	/**
+	 * Sets the directory that contains the locale data.
+	 * @param string $value the directory that contains the locale data.
+	 * @since 1.1.0
+	 */
+	public function setLocaleDataPath($value)
+	{
+		CLocale::$dataPath = $value;
+	}
+
+	/**
+	 * @return CNumberFormatter the locale-dependent number formatter.
+	 * The current {@link getLocale application locale} will be used.
+	 */
+	public function getNumberFormatter()
+	{
+		return $this->getLocale()->getNumberFormatter();
+	}
+
+	/**
+	 * Returns the locale-dependent date formatter.
+	 * @return CDateFormatter the locale-dependent date formatter.
+	 * The current {@link getLocale application locale} will be used.
+	 */
+	public function getDateFormatter()
+	{
+		return $this->getLocale()->getDateFormatter();
+	}
+
+	/**
+	 * Returns the database connection component.
+	 * @return CDbConnection the database connection
+	 */
+	public function getDb()
+	{
+		return $this->getComponent('db');
+	}
+
+	/**
+	 * Returns the error handler component.
+	 * @return CErrorHandler the error handler application component.
+	 */
+	public function getErrorHandler()
+	{
+		return $this->getComponent('errorHandler');
+	}
+
+	/**
+	 * Returns the security manager component.
+	 * @return CSecurityManager the security manager application component.
+	 */
+	public function getSecurityManager()
+	{
+		return $this->getComponent('securityManager');
+	}
+
+	/**
+	 * Returns the state persister component.
+	 * @return CStatePersister the state persister application component.
+	 */
+	public function getStatePersister()
+	{
+		return $this->getComponent('statePersister');
+	}
+
+	/**
+	 * Returns the cache component.
+	 * @return CCache the cache application component. Null if the component is not enabled.
+	 */
+	public function getCache()
+	{
+		return $this->getComponent('cache');
+	}
+
+	/**
+	 * Returns the core message translations component.
+	 * @return CPhpMessageSource the core message translations
+	 */
+	public function getCoreMessages()
+	{
+		return $this->getComponent('coreMessages');
+	}
+
+	/**
+	 * Returns the application message translations component.
+	 * @return CMessageSource the application message translations
+	 */
+	public function getMessages()
+	{
+		return $this->getComponent('messages');
+	}
+
+	/**
+	 * Returns the request component.
+	 * @return CHttpRequest the request component
+	 */
+	public function getRequest()
+	{
+		return $this->getComponent('request');
+	}
+
+	/**
+	 * Returns the URL manager component.
+	 * @return CUrlManager the URL manager component
+	 */
+	public function getUrlManager()
+	{
+		return $this->getComponent('urlManager');
+	}
+
+	/**
+	 * @return CController the currently active controller. Null is returned in this base class.
+	 * @since 1.1.8
+	 */
+	public function getController()
+	{
+		return null;
+	}
+
+	/**
+	 * Creates a relative URL based on the given controller and action information.
+	 * @param string $route the URL route. This should be in the format of 'ControllerID/ActionID'.
+	 * @param array $params additional GET parameters (name=>value). Both the name and value will be URL-encoded.
+	 * @param string $ampersand the token separating name-value pairs in the URL.
+	 * @return string the constructed URL
+	 */
+	public function createUrl($route, $params = array(), $ampersand = '&')
+	{
+		return $this->getUrlManager()->createUrl($route, $params, $ampersand);
+	}
+
+	/**
+	 * Creates an absolute URL based on the given controller and action information.
+	 * @param string $route the URL route. This should be in the format of 'ControllerID/ActionID'.
+	 * @param array $params additional GET parameters (name=>value). Both the name and value will be URL-encoded.
+	 * @param string $schema schema to use (e.g. http, https). If empty, the schema used for the current request will be used.
+	 * @param string $ampersand the token separating name-value pairs in the URL.
+	 * @return string the constructed URL
+	 */
+	public function createAbsoluteUrl($route, $params = array(), $schema = '', $ampersand = '&')
+	{
+		$url = $this->createUrl($route, $params, $ampersand);
+		if (strpos($url, 'http') === 0)
+			return $url;
+		else
+			return $this->getRequest()->getHostInfo($schema) . $url;
+	}
+
+	/**
+	 * Returns the relative URL for the application.
+	 * This is a shortcut method to {@link CHttpRequest::getBaseUrl()}.
+	 * @param boolean $absolute whether to return an absolute URL. Defaults to false, meaning returning a relative one.
+	 * This parameter has been available since 1.0.2.
+	 * @return string the relative URL for the application
+	 * @see CHttpRequest::getBaseUrl()
+	 */
+	public function getBaseUrl($absolute = false)
+	{
+		return $this->getRequest()->getBaseUrl($absolute);
+	}
+
+	/**
+	 * @return string the homepage URL
+	 */
+	public function getHomeUrl()
+	{
+		if ($this->_homeUrl === null)
+		{
+			if ($this->getUrlManager()->showScriptName)
+				return $this->getRequest()->getScriptUrl();
+			else
+				return $this->getRequest()->getBaseUrl() . '/';
+		}
+		else
+			return $this->_homeUrl;
+	}
+
+	/**
+	 * @param string $value the homepage URL
+	 */
+	public function setHomeUrl($value)
+	{
+		$this->_homeUrl = $value;
+	}
+
+	/**
+	 * Returns a global value.
+	 *
+	 * A global value is one that is persistent across users sessions and requests.
+	 * @param string $key the name of the value to be returned
+	 * @param mixed $defaultValue the default value. If the named global value is not found, this will be returned instead.
+	 * @return mixed the named global value
+	 * @see setGlobalState
+	 */
+	public function getGlobalState($key, $defaultValue = null)
+	{
+		if ($this->_globalState === null)
+			$this->loadGlobalState();
+		if (isset($this->_globalState[$key]))
+			return $this->_globalState[$key];
+		else
+			return $defaultValue;
+	}
+
+	/**
+	 * Sets a global value.
+	 *
+	 * A global value is one that is persistent across users sessions and requests.
+	 * Make sure that the value is serializable and unserializable.
+	 * @param string $key the name of the value to be saved
+	 * @param mixed $value the global value to be saved. It must be serializable.
+	 * @param mixed $defaultValue the default value. If the named global value is the same as this value, it will be cleared from the current storage.
+	 * @see getGlobalState
+	 */
+	public function setGlobalState($key, $value, $defaultValue = null)
+	{
+		if ($this->_globalState === null)
+			$this->loadGlobalState();
+
+		$changed = $this->_stateChanged;
+		if ($value === $defaultValue)
+		{
+			if (isset($this->_globalState[$key]))
+			{
+				unset($this->_globalState[$key]);
+				$this->_stateChanged = true;
+			}
+		}
+		elseif (!isset($this->_globalState[$key]) || $this->_globalState[$key] !== $value)
+		{
+			$this->_globalState[$key] = $value;
+			$this->_stateChanged = true;
+		}
+
+		if ($this->_stateChanged !== $changed)
+			$this->attachEventHandler('onEndRequest', array($this, 'saveGlobalState'));
+	}
+
+	/**
+	 * Clears a global value.
+	 *
+	 * The value cleared will no longer be available in this request and the following requests.
+	 * @param string $key the name of the value to be cleared
+	 */
+	public function clearGlobalState($key)
+	{
+		$this->setGlobalState($key, true, true);
+	}
+
+	/**
+	 * Loads the global state data from persistent storage.
+	 * @see getStatePersister
+	 * @throws CException if the state persister is not available
+	 */
+	public function loadGlobalState()
+	{
+		$persister = $this->getStatePersister();
+		if (($this->_globalState = $persister->load()) === null)
+			$this->_globalState = array();
+		$this->_stateChanged = false;
+		$this->detachEventHandler('onEndRequest', array($this, 'saveGlobalState'));
+	}
+
+	/**
+	 * Saves the global state data into persistent storage.
+	 * @see getStatePersister
+	 * @throws CException if the state persister is not available
+	 */
+	public function saveGlobalState()
+	{
+		if ($this->_stateChanged)
+		{
+			$this->_stateChanged = false;
+			$this->detachEventHandler('onEndRequest', array($this, 'saveGlobalState'));
+			$this->getStatePersister()->save($this->_globalState);
+		}
+	}
+
+	/**
+	 * Handles uncaught PHP exceptions.
+	 *
+	 * This method is implemented as a PHP exception handler. It requires
+	 * that constant YII_ENABLE_EXCEPTION_HANDLER be defined true.
+	 *
+	 * This method will first raise an {@link onException} event.
+	 * If the exception is not handled by any event handler, it will call
+	 * {@link getErrorHandler errorHandler} to process the exception.
+	 *
+	 * The application will be terminated by this method.
+	 *
+	 * @param Exception $exception exception that is not caught
+	 */
+	public function handleException($exception)
+	{
+		// disable error capturing to avoid recursive errors
+		restore_error_handler();
+		restore_exception_handler();
+
+		$category = 'exception.' . get_class($exception);
+		if ($exception instanceof CHttpException)
+			$category .= '.' . $exception->statusCode;
+		// php <5.2 doesn't support string conversion auto-magically
+		$message = $exception->__toString();
+		if (isset($_SERVER['REQUEST_URI']))
+			$message .= ' REQUEST_URI=' . $_SERVER['REQUEST_URI'];
+		Yii::log($message, CLogger::LEVEL_ERROR, $category);
+
+		try
+		{
+			$event = new CExceptionEvent($this, $exception);
+			$this->onException($event);
+			if (!$event->handled)
+			{
+				// try an error handler
+				if (($handler = $this->getErrorHandler()) !== null)
+					$handler->handle($event);
+				else
+					$this->displayException($exception);
+			}
+		}
+		catch(Exception $e)
+		{
+			$this->displayException($e);
+		}
+
+		try
+		{
+			$this->end(1);
+		}
+		catch(Exception $e)
+		{
+			// use the most primitive way to log error
+			$msg = get_class($e) . ': ' . $e->getMessage() . ' (' . $e->getFile() . ':' . $e->getLine() . ")\n";
+			$msg .= $e->getTraceAsString() . "\n";
+			$msg .= "Previous exception:\n";
+			$msg .= get_class($exception) . ': ' . $exception->getMessage() . ' (' . $exception->getFile() . ':' . $exception->getLine() . ")\n";
+			$msg .= $exception->getTraceAsString() . "\n";
+			$msg .= '$_SERVER=' . var_export($_SERVER, true);
+			error_log($msg);
+			exit(1);
+		}
+	}
+
+	/**
+	 * Handles PHP execution errors such as warnings, notices.
+	 *
+	 * This method is implemented as a PHP error handler. It requires
+	 * that constant YII_ENABLE_ERROR_HANDLER be defined true.
+	 *
+	 * This method will first raise an {@link onError} event.
+	 * If the error is not handled by any event handler, it will call
+	 * {@link getErrorHandler errorHandler} to process the error.
+	 *
+	 * The application will be terminated by this method.
+	 *
+	 * @param integer $code the level of the error raised
+	 * @param string $message the error message
+	 * @param string $file the filename that the error was raised in
+	 * @param integer $line the line number the error was raised at
+	 */
+	public function handleError($code, $message, $file, $line)
+	{
+		if ($code & error_reporting())
+		{
+			// disable error capturing to avoid recursive errors
+			restore_error_handler();
+			restore_exception_handler();
+
+			$log = "$message ($file:$line)\nStack trace:\n";
+			$trace = debug_backtrace();
+			// skip the first 3 stacks as they do not tell the error position
+			if (count($trace) > 3)
+				$trace = array_slice($trace, 3);
+			foreach ($trace as $i => $t)
+			{
+				if (!isset($t['file']))
+					$t['file'] = 'unknown';
+				if (!isset($t['line']))
+					$t['line'] = 0;
+				if (!isset($t['function']))
+					$t['function'] = 'unknown';
+				$log .= "#$i  {$t['file']}( {$t['line']}): ";
+				if (isset($t['object']) && is_object($t['object']))
+					$log .= get_class($t['object']) . '->';
+				$log .= " {$t['function']}()\n";
+			}
+			if (isset($_SERVER['REQUEST_URI']))
+				$log .= 'REQUEST_URI=' . $_SERVER['REQUEST_URI'];
+			Yii::log($log, CLogger::LEVEL_ERROR, 'php');
+
+			try
+			{
+				Yii::import('CErrorEvent', true);
+				$event = new CErrorEvent($this, $code, $message, $file, $line);
+				$this->onError($event);
+				if (!$event->handled)
+				{
+					// try an error handler
+					if (($handler = $this->getErrorHandler()) !== null)
+						$handler->handle($event);
+					else
+						$this->displayError($code, $message, $file, $line);
+				}
+			}
+			catch(Exception $e)
+			{
+				$this->displayException($e);
+			}
+
+			try
+			{
+				$this->end(1);
+			}
+			catch(Exception $e)
+			{
+				// use the most primitive way to log error
+				$msg = get_class($e) . ': ' . $e->getMessage() . ' (' . $e->getFile() . ':' . $e->getLine() . ")\n";
+				$msg .= $e->getTraceAsString() . "\n";
+				$msg .= "Previous error:\n";
+				$msg .= $log . "\n";
+				$msg .= '$_SERVER=' . var_export($_SERVER, true);
+				error_log($msg);
+				exit(1);
+			}
+		}
+	}
+
+	/**
+	 * Raised when an uncaught PHP exception occurs.
+	 *
+	 * An event handler can set the {@link CExceptionEvent::handled handled}
+	 * property of the event parameter to be true to indicate no further error
+	 * handling is needed. Otherwise, the {@link getErrorHandler errorHandler}
+	 * application component will continue processing the error.
+	 *
+	 * @param CExceptionEvent $event event parameter
+	 */
+	public function onException($event)
+	{
+		$this->raiseEvent('onException', $event);
+	}
+
+	/**
+	 * Raised when a PHP execution error occurs.
+	 *
+	 * An event handler can set the {@link CErrorEvent::handled handled}
+	 * property of the event parameter to be true to indicate no further error
+	 * handling is needed. Otherwise, the {@link getErrorHandler errorHandler}
+	 * application component will continue processing the error.
+	 *
+	 * @param CErrorEvent $event event parameter
+	 */
+	public function onError($event)
+	{
+		$this->raiseEvent('onError', $event);
+	}
+
+	/**
+	 * Displays the captured PHP error.
+	 * This method displays the error in HTML when there is
+	 * no active error handler.
+	 * @param integer $code error code
+	 * @param string $message error message
+	 * @param string $file error file
+	 * @param string $line error line
+	 */
+	public function displayError($code, $message, $file, $line)
+	{
+		if (YII_DEBUG)
+		{
+			echo "<h1>PHP Error [$code]</h1>\n";
+			echo "<p>$message ($file:$line)</p>\n";
+			echo '<pre>';
+
+			$trace = debug_backtrace();
+			// skip the first 3 stacks as they do not tell the error position
+			if (count($trace) > 3)
+				$trace = array_slice($trace, 3);
+			foreach ($trace as $i => $t)
+			{
+				if (!isset($t['file']))
+					$t['file'] = 'unknown';
+				if (!isset($t['line']))
+					$t['line'] = 0;
+				if (!isset($t['function']))
+					$t['function'] = 'unknown';
+				echo "#$i  {$t['file']}( {$t['line']}): ";
+				if (isset($t['object']) && is_object($t['object']))
+					echo get_class($t['object']) . '->';
+				echo " {$t['function']}()\n";
+			}
+
+			echo '</pre>';
+		}
+		else
+		{
+			echo "<h1>PHP Error [$code]</h1>\n";
+			echo "<p>$message</p>\n";
+		}
+	}
+
+	/**
+	 * Displays the uncaught PHP exception.
+	 * This method displays the exception in HTML when there is
+	 * no active error handler.
+	 * @param Exception $exception the uncaught exception
+	 */
+	public function displayException($exception)
+	{
+		if (YII_DEBUG)
+		{
+			echo '<h1>' . get_class($exception) . "</h1>\n";
+			echo '<p>' . $exception->getMessage() . ' (' . $exception->getFile() . ':' . $exception->getLine() . ')</p>';
+			echo '<pre>' . $exception->getTraceAsString() . '</pre>';
+		}
+		else
+		{
+			echo '<h1>' . get_class($exception) . "</h1>\n";
+			echo '<p>' . $exception->getMessage() . '</p>';
+		}
+	}
+
+	/**
+	 * Initializes the class autoloader and error handlers.
+	 */
+	protected function initSystemHandlers()
+	{
+		if (YII_ENABLE_EXCEPTION_HANDLER)
+			set_exception_handler(array($this, 'handleException'));
+		if (YII_ENABLE_ERROR_HANDLER)
+			set_error_handler(array($this, 'handleError'), error_reporting());
+	}
+
+	/**
+	 * Registers the core application components.
+	 * @see setComponents
+	 */
+	protected function registerCoreComponents()
+	{
+		$components = array(
+			'coreMessages' => array(
+				'class' => 'CPhpMessageSource',
+				'language' => 'en_us',
+				'basePath' => YII_PATH . DIRECTORY_SEPARATOR . 'messages',
+			),
+			'db' => array(
+				'class' => 'CDbConnection',
+			),
+			'messages' => array(
+				'class' => 'CPhpMessageSource',
+			),
+			'errorHandler' => array(
+				'class' => 'CErrorHandler',
+			),
+			'securityManager' => array(
+				'class' => 'CSecurityManager',
+			),
+			'statePersister' => array(
+				'class' => 'CStatePersister',
+			),
+			'urlManager' => array(
+				'class' => 'CUrlManager',
+			),
+			'request' => array(
+				'class' => 'CHttpRequest',
+			),
+			'format' => array(
+				'class' => 'CFormatter',
+			),
+		);
+
+		$this->setComponents($components);
+	}
+}
diff --git a/framework/base/ApplicationComponent.php b/framework/base/ApplicationComponent.php
new file mode 100644
index 0000000..bf8ee0e
--- /dev/null
+++ b/framework/base/ApplicationComponent.php
@@ -0,0 +1,55 @@
+<?php
+/**
+ * This file contains the base application component class.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2012 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+/**
+ * ApplicationComponent is the base class for application component classes.
+ *
+ * ApplicationComponent implements the basic methods required by {@link IApplicationComponent}.
+ *
+ * When developing an application component, try to put application component initialization code in
+ * the {@link init()} method instead of the constructor. This has the advantage that
+ * the application component can be customized through application configuration.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+abstract class ApplicationComponent extends Component
+{
+	/**
+	 * @var array the behaviors that should be attached to this component.
+	 * The behaviors will be attached to the component when {@link init} is called.
+	 * Please refer to {@link CModel::behaviors} on how to specify the value of this property.
+	 * @since 1.0.2
+	 */
+	public $behaviors = array();
+
+	private $_initialized = false;
+
+	/**
+	 * Initializes the application component.
+	 * This method is required by {@link IApplicationComponent} and is invoked by application.
+	 * If you override this method, make sure to call the parent implementation
+	 * so that the application component can be marked as initialized.
+	 */
+	public function init()
+	{
+		$this->attachBehaviors($this->behaviors);
+		$this->_initialized = true;
+	}
+
+	/**
+	 * Checks if this application component bas been initialized.
+	 * @return boolean whether this application component has been initialized (ie, {@link init()} is invoked).
+	 */
+	public function getIsInitialized()
+	{
+		return $this->_initialized;
+	}
+}
diff --git a/framework/base/Module.php b/framework/base/Module.php
new file mode 100644
index 0000000..f6a408f
--- /dev/null
+++ b/framework/base/Module.php
@@ -0,0 +1,501 @@
+<?php
+/**
+ * Module class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2012 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\base;
+
+/**
+ * Module is the base class for module and application classes.
+ *
+ * Module mainly manages application components and sub-modules.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+abstract class Module extends Component
+{
+	/**
+	 * @var array the IDs of the application components that should be preloaded.
+	 */
+	public $preload = array();
+	/**
+	 * @var array the behaviors that should be attached to the module.
+	 * The behaviors will be attached to the module when {@link init} is called.
+	 * Please refer to {@link CModel::behaviors} on how to specify the value of this property.
+	 */
+	public $behaviors = array();
+
+	private $_id;
+	private $_parentModule;
+	private $_basePath;
+	private $_modulePath;
+	private $_params;
+	private $_modules = array();
+	private $_moduleConfig = array();
+	private $_components = array();
+	private $_componentConfig = array();
+
+
+	/**
+	 * Constructor.
+	 * @param string $id the ID of this module
+	 * @param CModule $parent the parent module (if any)
+	 * @param mixed $config the module configuration. It can be either an array or
+	 * the path of a PHP file returning the configuration array.
+	 */
+	public function __construct($id, $parent, $config = null)
+	{
+		$this->_id = $id;
+		$this->_parentModule = $parent;
+
+		// set basePath at early as possible to avoid trouble
+		if (is_string($config))
+			$config = require($config);
+		if (isset($config['basePath']))
+		{
+			$this->setBasePath($config['basePath']);
+			unset($config['basePath']);
+		}
+		Yii::setPathOfAlias($id, $this->getBasePath());
+
+		$this->preinit();
+
+		$this->configure($config);
+		$this->attachBehaviors($this->behaviors);
+		$this->preloadComponents();
+
+		$this->init();
+	}
+
+	/**
+	 * Getter magic method.
+	 * This method is overridden to support accessing application components
+	 * like reading module properties.
+	 * @param string $name application component or property name
+	 * @return mixed the named property value
+	 */
+	public function __get($name)
+	{
+		if ($this->hasComponent($name))
+			return $this->getComponent($name);
+		else
+			return parent::__get($name);
+	}
+
+	/**
+	 * Checks if a property value is null.
+	 * This method overrides the parent implementation by checking
+	 * if the named application component is loaded.
+	 * @param string $name the property name or the event name
+	 * @return boolean whether the property value is null
+	 */
+	public function __isset($name)
+	{
+		if ($this->hasComponent($name))
+			return $this->getComponent($name) !== null;
+		else
+			return parent::__isset($name);
+	}
+
+	/**
+	 * Returns the module ID.
+	 * @return string the module ID.
+	 */
+	public function getId()
+	{
+		return $this->_id;
+	}
+
+	/**
+	 * Sets the module ID.
+	 * @param string $id the module ID
+	 */
+	public function setId($id)
+	{
+		$this->_id = $id;
+	}
+
+	/**
+	 * Returns the root directory of the module.
+	 * @return string the root directory of the module. Defaults to the directory containing the module class.
+	 */
+	public function getBasePath()
+	{
+		if ($this->_basePath === null)
+		{
+			$class = new ReflectionClass(get_class($this));
+			$this->_basePath = dirname($class->getFileName());
+		}
+		return $this->_basePath;
+	}
+
+	/**
+	 * Sets the root directory of the module.
+	 * This method can only be invoked at the beginning of the constructor.
+	 * @param string $path the root directory of the module.
+	 * @throws CException if the directory does not exist.
+	 */
+	public function setBasePath($path)
+	{
+		if (($this->_basePath = realpath($path)) === false || !is_dir($this->_basePath))
+			throw new CException(Yii::t('yii', 'Base path "{path}" is not a valid directory.',
+				array('{path}' => $path)));
+	}
+
+	/**
+	 * Returns user-defined parameters.
+	 * @return CAttributeCollection the list of user-defined parameters
+	 */
+	public function getParams()
+	{
+		if ($this->_params !== null)
+			return $this->_params;
+		else
+		{
+			$this->_params = new CAttributeCollection;
+			$this->_params->caseSensitive = true;
+			return $this->_params;
+		}
+	}
+
+	/**
+	 * Sets user-defined parameters.
+	 * @param array $value user-defined parameters. This should be in name-value pairs.
+	 */
+	public function setParams($value)
+	{
+		$params = $this->getParams();
+		foreach ($value as $k => $v)
+			$params->add($k, $v);
+	}
+
+	/**
+	 * Returns the directory that contains the application modules.
+	 * @return string the directory that contains the application modules. Defaults to the 'modules' subdirectory of {@link basePath}.
+	 */
+	public function getModulePath()
+	{
+		if ($this->_modulePath !== null)
+			return $this->_modulePath;
+		else
+			return $this->_modulePath = $this->getBasePath() . DIRECTORY_SEPARATOR . 'modules';
+	}
+
+	/**
+	 * Sets the directory that contains the application modules.
+	 * @param string $value the directory that contains the application modules.
+	 * @throws CException if the directory is invalid
+	 */
+	public function setModulePath($value)
+	{
+		if (($this->_modulePath = realpath($value)) === false || !is_dir($this->_modulePath))
+			throw new CException(Yii::t('yii', 'The module path "{path}" is not a valid directory.',
+				array('{path}' => $value)));
+	}
+
+	/**
+	 * Sets the aliases that are used in the module.
+	 * @param array $aliases list of aliases to be imported
+	 */
+	public function setImport($aliases)
+	{
+		foreach ($aliases as $alias)
+			Yii::import($alias);
+	}
+
+	/**
+	 * Defines the root aliases.
+	 * @param array $mappings list of aliases to be defined. The array keys are root aliases,
+	 * while the array values are paths or aliases corresponding to the root aliases.
+	 * For example,
+	 * <pre>
+	 * array(
+	 *    'models'=>'application.models',              // an existing alias
+	 *    'extensions'=>'application.extensions',      // an existing alias
+	 *    'backend'=>dirname(__FILE__).'/../backend',  // a directory
+	 * )
+	 * </pre>
+	 * @since 1.0.5
+	 */
+	public function setAliases($mappings)
+	{
+		foreach ($mappings as $name => $alias)
+		{
+			if (($path = Yii::getPathOfAlias($alias)) !== false)
+				Yii::setPathOfAlias($name, $path);
+			else
+				Yii::setPathOfAlias($name, $alias);
+		}
+	}
+
+	/**
+	 * Returns the parent module.
+	 * @return CModule the parent module. Null if this module does not have a parent.
+	 */
+	public function getParentModule()
+	{
+		return $this->_parentModule;
+	}
+
+	/**
+	 * Retrieves the named application module.
+	 * The module has to be declared in {@link modules}. A new instance will be created
+	 * when calling this method with the given ID for the first time.
+	 * @param string $id application module ID (case-sensitive)
+	 * @return CModule the module instance, null if the module is disabled or does not exist.
+	 */
+	public function getModule($id)
+	{
+		if (isset($this->_modules[$id]) || array_key_exists($id, $this->_modules))
+			return $this->_modules[$id];
+		elseif (isset($this->_moduleConfig[$id]))
+		{
+			$config = $this->_moduleConfig[$id];
+			if (!isset($config['enabled']) || $config['enabled'])
+			{
+				Yii::trace("Loading \"$id\" module", 'system.base.CModule');
+				$class = $config['class'];
+				unset($config['class'], $config['enabled']);
+				if ($this === Yii::app())
+					$module = Yii::createComponent($class, $id, null, $config);
+				else
+					$module = Yii::createComponent($class, $this->getId() . '/' . $id, $this, $config);
+				return $this->_modules[$id] = $module;
+			}
+		}
+	}
+
+	/**
+	 * Returns a value indicating whether the specified module is installed.
+	 * @param string $id the module ID
+	 * @return boolean whether the specified module is installed.
+	 * @since 1.1.2
+	 */
+	public function hasModule($id)
+	{
+		return isset($this->_moduleConfig[$id]) || isset($this->_modules[$id]);
+	}
+
+	/**
+	 * Returns the configuration of the currently installed modules.
+	 * @return array the configuration of the currently installed modules (module ID => configuration)
+	 */
+	public function getModules()
+	{
+		return $this->_moduleConfig;
+	}
+
+	/**
+	 * Configures the sub-modules of this module.
+	 *
+	 * Call this method to declare sub-modules and configure them with their initial property values.
+	 * The parameter should be an array of module configurations. Each array element represents a single module,
+	 * which can be either a string representing the module ID or an ID-configuration pair representing
+	 * a module with the specified ID and the initial property values.
+	 *
+	 * For example, the following array declares two modules:
+	 * <pre>
+	 * array(
+	 *     'admin',                // a single module ID
+	 *     'payment'=>array(       // ID-configuration pair
+	 *         'server'=>'paymentserver.com',
+	 *     ),
+	 * )
+	 * </pre>
+	 *
+	 * By default, the module class is determined using the expression <code>ucfirst($moduleID).'Module'</code>.
+	 * And the class file is located under <code>modules/$moduleID</code>.
+	 * You may override this default by explicitly specifying the 'class' option in the configuration.
+	 *
+	 * You may also enable or disable a module by specifying the 'enabled' option in the configuration.
+	 *
+	 * @param array $modules module configurations.
+	 */
+	public function setModules($modules)
+	{
+		foreach ($modules as $id => $module)
+		{
+			if (is_int($id))
+			{
+				$id = $module;
+				$module = array();
+			}
+			if (!isset($module['class']))
+			{
+				Yii::setPathOfAlias($id, $this->getModulePath() . DIRECTORY_SEPARATOR . $id);
+				$module['class'] = $id . '.' . ucfirst($id) . 'Module';
+			}
+
+			if (isset($this->_moduleConfig[$id]))
+				$this->_moduleConfig[$id] = CMap::mergeArray($this->_moduleConfig[$id], $module);
+			else
+				$this->_moduleConfig[$id] = $module;
+		}
+	}
+
+	/**
+	 * Checks whether the named component exists.
+	 * @param string $id application component ID
+	 * @return boolean whether the named application component exists (including both loaded and disabled.)
+	 */
+	public function hasComponent($id)
+	{
+		return isset($this->_components[$id]) || isset($this->_componentConfig[$id]);
+	}
+
+	/**
+	 * Retrieves the named application component.
+	 * @param string $id application component ID (case-sensitive)
+	 * @param boolean $createIfNull whether to create the component if it doesn't exist yet. This parameter
+	 * has been available since version 1.0.6.
+	 * @return IApplicationComponent the application component instance, null if the application component is disabled or does not exist.
+	 * @see hasComponent
+	 */
+	public function getComponent($id, $createIfNull = true)
+	{
+		if (isset($this->_components[$id]))
+			return $this->_components[$id];
+		elseif (isset($this->_componentConfig[$id]) && $createIfNull)
+		{
+			$config = $this->_componentConfig[$id];
+			if (!isset($config['enabled']) || $config['enabled'])
+			{
+				Yii::trace("Loading \"$id\" application component", 'system.CModule');
+				unset($config['enabled']);
+				$component = Yii::createComponent($config);
+				$component->init();
+				return $this->_components[$id] = $component;
+			}
+		}
+	}
+
+	/**
+	 * Puts a component under the management of the module.
+	 * The component will be initialized by calling its {@link CApplicationComponent::init() init()}
+	 * method if it has not done so.
+	 * @param string $id component ID
+	 * @param IApplicationComponent $component the component to be added to the module.
+	 * If this parameter is null, it will unload the component from the module.
+	 */
+	public function setComponent($id, $component)
+	{
+		if ($component === null)
+			unset($this->_components[$id]);
+		else
+		{
+			$this->_components[$id] = $component;
+			if (!$component->getIsInitialized())
+				$component->init();
+		}
+	}
+
+	/**
+	 * Returns the application components.
+	 * @param boolean $loadedOnly whether to return the loaded components only. If this is set false,
+	 * then all components specified in the configuration will be returned, whether they are loaded or not.
+	 * Loaded components will be returned as objects, while unloaded components as configuration arrays.
+	 * This parameter has been available since version 1.1.3.
+	 * @return array the application components (indexed by their IDs)
+	 */
+	public function getComponents($loadedOnly = true)
+	{
+		if ($loadedOnly)
+			return $this->_components;
+		else
+			return array_merge($this->_componentConfig, $this->_components);
+	}
+
+	/**
+	 * Sets the application components.
+	 *
+	 * When a configuration is used to specify a component, it should consist of
+	 * the component's initial property values (name-value pairs). Additionally,
+	 * a component can be enabled (default) or disabled by specifying the 'enabled' value
+	 * in the configuration.
+	 *
+	 * If a configuration is specified with an ID that is the same as an existing
+	 * component or configuration, the existing one will be replaced silently.
+	 *
+	 * The following is the configuration for two components:
+	 * <pre>
+	 * array(
+	 *     'db'=>array(
+	 *         'class'=>'CDbConnection',
+	 *         'connectionString'=>'sqlite:path/to/file.db',
+	 *     ),
+	 *     'cache'=>array(
+	 *         'class'=>'CDbCache',
+	 *         'connectionID'=>'db',
+	 *         'enabled'=>!YII_DEBUG,  // enable caching in non-debug mode
+	 *     ),
+	 * )
+	 * </pre>
+	 *
+	 * @param array $components application components(id=>component configuration or instances)
+	 * @param boolean $merge whether to merge the new component configuration with the existing one.
+	 * Defaults to true, meaning the previously registered component configuration of the same ID
+	 * will be merged with the new configuration. If false, the existing configuration will be replaced completely.
+	 */
+	public function setComponents($components, $merge = true)
+	{
+		foreach ($components as $id => $component)
+		{
+			if ($component instanceof IApplicationComponent)
+				$this->setComponent($id, $component);
+			elseif (isset($this->_componentConfig[$id]) && $merge)
+				$this->_componentConfig[$id] = CMap::mergeArray($this->_componentConfig[$id], $component);
+			else
+				$this->_componentConfig[$id] = $component;
+		}
+	}
+
+	/**
+	 * Configures the module with the specified configuration.
+	 * @param array $config the configuration array
+	 */
+	public function configure($config)
+	{
+		if (is_array($config))
+		{
+			foreach ($config as $key => $value)
+				$this->$key = $value;
+		}
+	}
+
+	/**
+	 * Loads static application components.
+	 */
+	protected function preloadComponents()
+	{
+		foreach ($this->preload as $id)
+			$this->getComponent($id);
+	}
+
+	/**
+	 * Preinitializes the module.
+	 * This method is called at the beginning of the module constructor.
+	 * You may override this method to do some customized preinitialization work.
+	 * Note that at this moment, the module is not configured yet.
+	 * @see init
+	 */
+	protected function preinit()
+	{
+	}
+
+	/**
+	 * Initializes the module.
+	 * This method is called at the end of the module constructor.
+	 * Note that at this moment, the module has been configured, the behaviors
+	 * have been attached and the application components have been registered.
+	 * @see preinit
+	 */
+	protected function init()
+	{
+	}
+}