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src/Symfony/Component/ClassLoader/XCacheUniversalClassLoader.php
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<?php | ||
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/* | ||
* This file is part of the Symfony package. | ||
* | ||
* (c) Fabien Potencier <fabien@symfony.com> | ||
* | ||
* For the full copyright and license information, please view the LICENSE | ||
* file that was distributed with this source code. | ||
*/ | ||
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namespace Symfony\Component\ClassLoader; | ||
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/** | ||
* XCacheUniversalClassLoader implements a "universal" autoloader cached in XCache for PHP 5.3. | ||
* | ||
* It is able to load classes that use either: | ||
* | ||
* * The technical interoperability standards for PHP 5.3 namespaces and | ||
* class names (http://groups.google.com/group/php-standards/web/psr-0-final-proposal); | ||
* | ||
* * The PEAR naming convention for classes (http://pear.php.net/). | ||
* | ||
* Classes from a sub-namespace or a sub-hierarchy of PEAR classes can be | ||
* looked for in a list of locations to ease the vendoring of a sub-set of | ||
* classes for large projects. | ||
* | ||
* Example usage: | ||
* | ||
* require 'vendor/symfony/src/Symfony/Component/ClassLoader/UniversalClassLoader.php'; | ||
* require 'vendor/symfony/src/Symfony/Component/ClassLoader/XCacheUniversalClassLoader.php'; | ||
* | ||
* use Symfony\Component\ClassLoader\XCacheUniversalClassLoader; | ||
* | ||
* $loader = new XCacheUniversalClassLoader('xcache.prefix.'); | ||
* | ||
* // register classes with namespaces | ||
* $loader->registerNamespaces(array( | ||
* 'Symfony\Component' => __DIR__.'/component', | ||
* 'Symfony' => __DIR__.'/framework', | ||
* 'Sensio' => array(__DIR__.'/src', __DIR__.'/vendor'), | ||
* )); | ||
* | ||
* // register a library using the PEAR naming convention | ||
* $loader->registerPrefixes(array( | ||
* 'Swift_' => __DIR__.'/Swift', | ||
* )); | ||
* | ||
* // activate the autoloader | ||
* $loader->register(); | ||
* | ||
* In this example, if you try to use a class in the Symfony\Component | ||
* namespace or one of its children (Symfony\Component\Console for instance), | ||
* the autoloader will first look for the class under the component/ | ||
* directory, and it will then fallback to the framework/ directory if not | ||
* found before giving up. | ||
* | ||
* @author Fabien Potencier <fabien@symfony.com> | ||
* @author Kris Wallsmith <kris@symfony.com> | ||
* @author Kim Hemsø Rasmussen <kimhemsoe@gmail.com> | ||
* | ||
* | ||
* @api | ||
*/ | ||
class XCacheUniversalClassLoader extends UniversalClassLoader | ||
{ | ||
private $prefix; | ||
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/** | ||
* Constructor. | ||
* | ||
* @param string $prefix A prefix to create a namespace in XCache | ||
* | ||
* @api | ||
*/ | ||
public function __construct($prefix) | ||
{ | ||
if (!extension_loaded('xcache')) { | ||
throw new \RuntimeException('Unable to use XCacheUniversalClassLoader as XCache is not enabled.'); | ||
} | ||
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$this->prefix = $prefix; | ||
} | ||
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/** | ||
* Finds a file by class name while caching lookups to XCache. | ||
* | ||
* @param string $class A class name to resolve to file | ||
*/ | ||
public function findFile($class) | ||
{ | ||
if (xcache_isset($this->prefix.$class)) { | ||
$file = xcache_get($this->prefix.$class); | ||
} else { | ||
xcache_set($this->prefix.$class, $file = parent::findFile($class)); | ||
} | ||
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return $file; | ||
} | ||
} |