public static function &getInstance()
{
if (self::$_instance == null) {
self::$_instance = new __CacheManager();
}
return self::$_instance;
}
protected function _loadClassLocations()
{
//normalize the base dir:
$this->_normalized_basedir = rtrim($this->_base_dir, DIRECTORY_SEPARATOR);
//load the classes:
$debug_mode = __Lion::getInstance()->getRuntimeDirectives()->getDirective('DEBUG_MODE');
if (!$debug_mode) {
$this->_metadata = __CacheManager::getInstance()->getCache()->getData('classloader_' . $this->_normalized_basedir);
}
if ($this->_metadata == null) {
$this->_metadata = $this->_loadMetadata();
if (!$debug_mode) {
__CacheManager::getInstance()->getCache()->setData('classloader_' . $this->_normalized_basedir, $this->_metadata);
}
}
$this->_mapping = $this->_metadata['mapping'];
$this->_autoloaders = $this->_metadata['autoloaders'];
$this->_classpaths = $this->_metadata['classpaths'];
}
public function &createContext($context_id, $context_base_dir, $configuration_file = null)
{
if ($this->hasContext($context_id)) {
throw __ExceptionFactory::getInstance()->createException('Context already exists for context identifier ' . $context_id);
}
//create a class file locator for the context to create to
$class_file_locator = new __ClassFileLocator($context_base_dir);
__ClassLoader::getInstance()->addClassFileLocator($class_file_locator);
//scann in depth starting from configuration location before scanning the context basedir
if ($configuration_file != null) {
$configuration_base_dir = dirname($configuration_file);
if (strpos($configuration_base_dir, $context_base_dir) === false) {
$configuration_class_file_locator = new __ClassFileLocator($configuration_base_dir);
__ClassLoader::getInstance()->addClassFileLocator($configuration_class_file_locator);
}
}
//do not read nor store into the cache the initial context in case of DEBUG_MODE active:
if (__Lion::getInstance()->getRuntimeDirectives()->getDirective('DEBUG_MODE')) {
$cache = null;
//by default
$context = null;
} else {
$cache = __CacheManager::getInstance()->getCache();
$context = $cache->getData('__Context__' . $context_id);
if ($context != null) {
$this->_addContext($context);
}
}
//if no context has been read from cache:
if ($context == null) {
$context = new __Context($context_id, $context_base_dir);
$this->_addContext($context);
$context->loadConfiguration($configuration_file);
if ($cache != null) {
$cache->setData('__Context__' . $context_id, $context);
}
}
//Startup the context
$context->startup();
//return a reference to the already created context:
return $context;
}
/**
* Gets the cache associated to current context
*
* @return __Cache
*/
public function &getCache()
{
//cache is shared between all contexts:
return __CacheManager::getInstance()->getCache();
}
