2011-1-2-------------Mage::getStoreConfig-----函数分析！！

1.

/**

* Retrieve config value for store by path

*

* @param string $path

* @param mixed $store

* @return mixed

*/

public static function getStoreConfig($path, $store = null)

{

return self::app()->getStore($store)->getConfig($path);

}

2

public static function app($code = '', $type = 'store', $options = array())

{

if (null === self::$_app) {

self::$_app = new Mage_Core_Model_App();

self::setRoot();

self::$_events = new Varien_Event_Collection();

self::$_config = new Mage_Core_Model_Config();

Varien_Profiler::start('self::app::init');

self::$_app->init($code, $type, $options);

Varien_Profiler::stop('self::app::init');

self::$_app->loadAreaPart(Mage_Core_Model_App_Area::AREA_GLOBAL, Mage_Core_Model_App_Area::PART_EVENTS);

}

return self::$_app;

}

3

mage_core_model_app

public function init($code, $type=null, $options=array())

{

$this->_initEnvironment();

if (is_string($options)) {

$options = array('etc_dir'=>$options);

}

Varien_Profiler::start('mage::app::init::config');

$this->_config = Mage::getConfig();

$this->_initBaseConfig();

$this->_initCache();

$this->_config->init($options);

Varien_Profiler::stop('mage::app::init::config');

if (Mage::isInstalled($options)) {

$this->_initCurrentStore($code, $type);

$this->_initRequest();

}

return $this;

}

在初始化函数里面，将初始化好的mage.php中的$_config传入app对象中，赋值于内部的$this->_config

3.1

//错误处理handle的指定。默认时区指定为UTC。

$this->_initEnvironment();

4

//Initialize PHP environment。@return Mage_Core_Model_App

protected function _initEnvironment()

{

$this->setErrorHandler(self::DEFAULT_ERROR_HANDLER);

date_default_timezone_set(Mage_Core_Model_Locale::DEFAULT_TIMEZONE);

return $this;

}

4.1

const DEFAULT_ERROR_HANDLER = 'mageCoreErrorHandler';

public function setErrorHandler($handler)

{

set_error_handler($handler);

return $this;

}

//Sets a user-defined error handler function

set_error_handler($handler);

4.2

const DEFAULT_TIMEZONE = 'UTC';

//Sets the default timezone used by all date/time functions in a script

date_default_timezone_set(Mage_Core_Model_Locale::DEFAULT_TIMEZONE);

4.3

$this->_initCache();

protected function _initCache()

{

$options = $this->_config->getNode('global/cache');

if ($options) {

$options = $options->asArray();

} else {

$options = array();

}

$this->_cache = Mage::getModel('core/cache', $options);

return $this;

}

$options 为$this->config->getNode('global/cache')->asArray();是数组形式的配置信息。

4.3.1

public static function getModel($modelClass = '', $arguments = array())

{

return self::getConfig()->getModelInstance($modelClass, $arguments);

}

4.3.2

public function getModelInstance($modelClass='', $constructArguments=array())

{

$className = $this->getModelClassName($modelClass);

if (class_exists($className)) {

Varien_Profiler::start('CORE::create_object_of::'.$className);

$obj = new $className($constructArguments);

Varien_Profiler::stop('CORE::create_object_of::'.$className);

return $obj;

} else {

#throw Mage::exception('Mage_Core', Mage::helper('core')->__('Model class does not exist: %s.', $modelClass));

return false;

}

}

4.4

故

$this->_initCache(); ------>$this->_cache =?

得到的是

$this->_config->getNode('global/cache')

$this->_cache = Mage::getModel('core/cache', $options);

core模块下的cache块。

5

$this->_config->init($options);

/**

* Initialization of core configuration

*

* @return Mage_Core_Model_Config

*/

public function init($options=array())

{

$this->setCacheChecksum(null);

$this->_cacheLoadedSections = array();

$this->setOptions($options);

$this->loadBase();

$cacheLoad = $this->loadModulesCache();

if ($cacheLoad) {

return $this;

}

$this->loadModules();

$this->loadDb();

$this->saveCache();

return $this;

}

初始化core配置。

5.1

$this->setOptions($options);

/**

* Set configuration options

*

* @param array $options

* @return Mage_Core_Model_Config

*/

public function setOptions($options)

{

if (is_array($options)) {

$this->getOptions()->addData($options);

}

return $this;

}

5.2

//取到一些文件里面的配置文件通过$this->loadFile()函数

//mage/core/model/config.php,$etcDir由options.php文件里面的数组得到， $etcDir = $this->getOptions()->getEtcDir();

public function loadBase()

{

$etcDir = $this->getOptions()->getEtcDir();

$files = glob($etcDir.DS.'*.xml');

$this->loadFile(current($files));

while ($file = next($files)) {

$merge = clone $this->_prototype;

$merge->loadFile($file);

$this->extend($merge);

}

if (in_array($etcDir.DS.'local.xml', $files)) {

$this->_isLocalConfigLoaded = true;

}

return $this;

}

5.3

$etcDir = $this->getOptions()->getEtcDir();

public function setOptions($options)

{

if (is_array($options)) {

$this->getOptions()->addData($options);

}

return $this;

}

5.4

public function getEtcDir()

{

//return $this->getDataSetDefault('etc_dir', $this->getAppDir().DS.'etc');

return $this->_data['etc_dir'];

}

5.5

$files = glob($etcDir.DS.'*.xml');

glob()函数的作用是：以数组的形式返回与指定模式相匹配的文件名或目录。

6

if (Mage::isInstalled($options)) {

$this->_initCurrentStore($code, $type);

$this->_initRequest();

}

Mage::isInstalled($options)

6.1

* Retrieve application installation flag

public static function isInstalled($options = array())

{

if (self::$_isInstalled === null) {

self::setRoot();

if (is_string($options)) {

$options = array('etc_dir' => $options);

}

$etcDir = 'etc';

if (!empty($options['etc_dir'])) {

$etcDir = $options['etc_dir'];

}

$localConfigFile = self::getRoot() . DS . $etcDir . DS . 'local.xml';

self::$_isInstalled = false;

if (is_readable($localConfigFile)) {

$localConfig = simplexml_load_file($localConfigFile);

date_default_timezone_set('UTC');

if (($date = $localConfig->global->install->date) && strtotime($date)) {

self::$_isInstalled = true;

}

}

}

return self::$_isInstalled;

}

6.2

public static function setRoot($appRoot = '')

{

if (self::$_appRoot) {

return ;

}

if ('' === $appRoot) {

// automagically find application root by dirname of Mage.php

$appRoot = dirname(__FILE__);

}

$appRoot = realpath($appRoot);

if (is_dir($appRoot) and is_readable($appRoot)) {

self::$_appRoot = $appRoot;

} else {

self::throwException($appRoot . ' is not a directory or not readable by this user');

}

}

6.3

$this->_initCurrentStore($code, $type);

/**

* Initialize currently ran store

*

* @param string $scopeCode code of default scope (website/store_group/store code)

* @param string $scopeType type of default scope (website/group/store)

* @return unknown_type

*/

protected function _initCurrentStore($scopeCode, $scopeType)

{

Varien_Profiler::start('mage::app::init::stores');

$this->_initStores();

Varien_Profiler::stop('mage::app::init::stores');

if (empty($scopeCode) && !is_null($this->_website)) {

$scopeCode = $this->_website->getCode();

$scopeType = 'website';

}

switch ($scopeType) {

case 'store':

$this->_currentStore = $scopeCode;

break;

case 'group':

$this->_currentStore = $this->_getStoreByGroup($scopeCode);

break;

case 'website':

$this->_currentStore = $this->_getStoreByWebsite($scopeCode);

break;

default:

$this->throwStoreException();

}

if (!empty($this->_currentStore)) {

$this->_checkCookieStore($scopeType);

$this->_checkGetStore($scopeType);

}

return $this;

}

6.4

mage/CORE/MODEL/APP

$this->_initStores();

/**

* Init store, group and website collections

*

*/

protected function _initStores()

{

$this->_stores = array();

$this->_groups = array();

$this->_website = null;

$this->_websites = array();

$websiteCollection = Mage::getModel('core/website')->getCollection()

->initCache($this->getCache(), 'app', array(Mage_Core_Model_Website::CACHE_TAG))

->setLoadDefault(true);

$groupCollection = Mage::getModel('core/store_group')->getCollection()

->initCache($this->getCache(), 'app', array(Mage_Core_Model_Store_Group::CACHE_TAG))

->setLoadDefault(true);

$storeCollection = Mage::getModel('core/store')->getCollection()

->initCache($this->getCache(), 'app', array(Mage_Core_Model_Store::CACHE_TAG))

->setLoadDefault(true);

$this->_isSingleStore = false;

if ($this->_isSingleStoreAllowed) {

$this->_isSingleStore = $storeCollection->count() < 3;

}

$websiteStores = array();

$websiteGroups = array();

$groupStores = array();

foreach ($storeCollection as $store) {

/* @var $store Mage_Core_Model_Store */

$store->initConfigCache();

$store->setWebsite($websiteCollection->getItemById($store->getWebsiteId()));

$store->setGroup($groupCollection->getItemById($store->getGroupId()));

$this->_stores[$store->getId()] = $store;

$this->_stores[$store->getCode()] = $store;

$websiteStores[$store->getWebsiteId()][$store->getId()] = $store;

$groupStores[$store->getGroupId()][$store->getId()] = $store;

if (is_null($this->_store) && $store->getId()) {

$this->_store = $store;

}

}

foreach ($groupCollection as $group) {

/* @var $group Mage_Core_Model_Store_Group */

if (!isset($groupStores[$group->getId()])) {

$groupStores[$group->getId()] = array();

}

$group->setStores($groupStores[$group->getId()]);

$group->setWebsite($websiteCollection->getItemById($group->getWebsiteId()));

$websiteGroups[$group->getWebsiteId()][$group->getId()] = $group;

$this->_groups[$group->getId()] = $group;

}

foreach ($websiteCollection as $website) {

/* @var $website Mage_Core_Model_Website */

if (!isset($websiteGroups[$website->getId()])) {

$websiteGroups[$website->getId()] = array();

}

if (!isset($websiteStores[$website->getId()])) {

$websiteStores[$website->getId()] = array();

}

if ($website->getIsDefault()) {

$this->_website = $website;

}

$website->setGroups($websiteGroups[$website->getId()]);

$website->setStores($websiteStores[$website->getId()]);

$this->_websites[$website->getId()] = $website;

$this->_websites[$website->getCode()] = $website;

}

}

7

/**

* Init request object

*

* @return Mage_Core_Model_App

*/

protected function _initRequest()

{

$this->getRequest()->setPathInfo();

return $this;

}

7.1

/**

* Retrieve request object

*

* @return Mage_Core_Controller_Request_Http

*/

public function getRequest()

{

if (empty($this->_request)) {

$this->_request = new Mage_Core_Controller_Request_Http();

}

return $this->_request;

}

7.2

/**

* Set the PATH_INFO string

* Set the ORIGINAL_PATH_INFO string

*

* @param string|null $pathInfo

* @return Zend_Controller_Request_Http

*/

public function setPathInfo($pathInfo = null)

{

if ($pathInfo === null) {

$requestUri = $this->getRequestUri();

if (null === $requestUri) {

return $this;

}

// Remove the query string from REQUEST_URI

$pos = strpos($requestUri, '?');

if ($pos) {

$requestUri = substr($requestUri, 0, $pos);

}

$baseUrl = $this->getBaseUrl();

$pathInfo = substr($requestUri, strlen($baseUrl));

if ((null !== $baseUrl) && (false === $pathInfo)) {

$pathInfo = '';

} elseif (null === $baseUrl) {

$pathInfo = $requestUri;

}

if ($this->_canBeStoreCodeInUrl()) {

$pathParts = explode('/', ltrim($pathInfo, '/'), 2);

$storeCode = $pathParts[0];

if (!$this->isDirectAccessFrontendName($storeCode)) {

$stores = Mage::app()->getStores(true, true);

if ($storeCode!=='' && isset($stores[$storeCode])) {

Mage::app()->setCurrentStore($storeCode);

$pathInfo = '/'.(isset($pathParts[1]) ? $pathParts[1] : '');

}

elseif ($storeCode !== '') {

$this->setActionName('noRoute');

}

}

}

$this->_originalPathInfo = (string) $pathInfo;

$this->_requestString = $pathInfo . ($pos!==false ? substr($requestUri, $pos) : '');

}

$this->_pathInfo = (string) $pathInfo;

return $this;

}

7.2.1

/**

* Returns the REQUEST_URI taking into account

* platform differences between Apache and IIS

*

* @return string

*/

public function getRequestUri()

{

if (empty($this->_requestUri)) {

$this->setRequestUri();

}

return $this->_requestUri;

}

8

/**

* Retrieve application store object

*

* @return Mage_Core_Model_Store

*/

public function getStore($id=null)

{

if (!Mage::isInstalled() || $this->getUpdateMode()) {

return $this->_getDefaultStore();

}

if ($id === true && $this->isSingleStoreMode()) {

return $this->_store;

}

if (is_null($id) || ''===$id || $id === true) {

$id = $this->_currentStore;

}

if ($id instanceof Mage_Core_Model_Store) {

return $id;

}

if (is_null($id)) {

$this->throwStoreException();

}

if (empty($this->_stores[$id])) {

$store = Mage::getModel('core/store');

/* @var $store Mage_Core_Model_Store */

if (is_numeric($id)) {

$store->load($id);

} elseif (is_string($id)) {

$store->load($id, 'code');

}

if (!$store->getCode()) {

$this->throwStoreException();

}

$this->_stores[$store->getStoreId()] = $store;

$this->_stores[$store->getCode()] = $store;

}

return $this->_stores[$id];

}

8.1

return $this->_getDefaultStore();

protected function _getDefaultStore()

{

if (empty($this->_store)) {

$this->_store = Mage::getModel('core/store')

->setId(self::DISTRO_STORE_ID)

->setCode(self::DISTRO_STORE_CODE);

}

return $this->_store;

}

/**

* Default store Id (for install)

*/

const DISTRO_STORE_ID = 1;

/**

* Default store code (for install)

*

*/

const DISTRO_STORE_CODE = 'default';

8.2

Mage_Core_Model_Store

public function getConfig($path)

{

if (isset($this->_configCache[$path])) {

return $this->_configCache[$path];

}

$config = Mage::getConfig();

$fullPath = 'stores/'.$this->getCode().'/'.$path;

$data = $config->getNode($fullPath);

if (!$data && !Mage::isInstalled()) {

$data = $config->getNode('default/' . $path);

}

if (!$data) {

return null;

}

return $this->_processConfigValue($fullPath, $path, $data);

}

初始化步骤

首先在mage::函数里面定义$_events,$_config,加载event，

初始化：

$_config：

1

$this->setCacheId('config_global');

$this->_options = new Mage_Core_Model_Config_Options();

$this->_prototype = new Mage_Core_Model_Config_Base();

$this->_cacheChecksum = null;

2

$this->_elementClass = 'Mage_Core_Model_Config_Element';

3

$this->setXml($sourceData);//此时为空。

4

$this->_config->loadBase();//得到etc文件，并加载。等价于 $this->_config->init();没有参数的config初始化函数

5

Initialize application cache instance

_initCache()

6

$this->_config->init($options);带参数的config初始化函数。

我理解成对配置文件的读入，然后加载。。。不知道对不？？？

7

Initialize currently ran store

$this->_initCurrentStore($code, $type)

8

Init request object

$this->_initRequest();

****************************************************************************

website,store_group,store等模块的初始化函数MAGE/CORE/MODEL/APP.php下的_initStores()函数，

$websiteCollection = Mage::getModel('core/website')->getCollection()

->initCache($this->getCache(), 'app', array(Mage_Core_Model_Website::CACHE_TAG))

->setLoadDefault(true);

$groupCollection = Mage::getModel('core/store_group')->getCollection()

->initCache($this->getCache(), 'app', array(Mage_Core_Model_Store_Group::CACHE_TAG))

->setLoadDefault(true);

$storeCollection = Mage::getModel('core/store')->getCollection()

->initCache($this->getCache(), 'app', array(Mage_Core_Model_Store::CACHE_TAG))

->setLoadDefault(true);