LifetimeCacheStrategy.php
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<?php
/*
* This file is part of twig-cache-extension.
*
* (c) Alexander <iam.asm89@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Asm89\Twig\CacheExtension\CacheStrategy;
use Asm89\Twig\CacheExtension\CacheProviderInterface;
use Asm89\Twig\CacheExtension\CacheStrategyInterface;
use Asm89\Twig\CacheExtension\Exception\InvalidCacheLifetimeException;
/**
* Strategy for caching with a pre-defined lifetime.
*
* The value passed to the strategy is the lifetime of the cache block in
* seconds.
*
* @author Alexander <iam.asm89@gmail.com>
*/
class LifetimeCacheStrategy implements CacheStrategyInterface
{
private $cache;
/**
* @param CacheProviderInterface $cache
*/
public function __construct(CacheProviderInterface $cache)
{
$this->cache = $cache;
}
/**
* {@inheritDoc}
*/
public function fetchBlock($key)
{
return $this->cache->fetch($key['key']);
}
/**
* {@inheritDoc}
*/
public function generateKey($annotation, $value)
{
if (!is_numeric($value)) {
throw new InvalidCacheLifetimeException($value);
}
return array(
'lifetime' => $value,
'key' => '__LCS__' . $annotation,
);
}
/**
* {@inheritDoc}
*/
public function saveBlock($key, $block)
{
return $this->cache->save($key['key'], $block, $key['lifetime']);
}
}