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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Cache\Storage\Adapter;
use Zend\Cache\Exception;
use Zend\Cache\Storage\ClearByNamespaceInterface;
use Zend\Cache\Storage\FlushableInterface;
use Zend\Cache\Storage\TotalSpaceCapableInterface;
class ZendServerShm extends AbstractZendServer implements
ClearByNamespaceInterface,
FlushableInterface,
TotalSpaceCapableInterface
{
/**
* Constructor
*
* @param null|array|\Traversable|AdapterOptions $options
* @throws Exception\ExtensionNotLoadedException
*/
public function __construct($options = array())
{
if (!function_exists('zend_shm_cache_store')) {
throw new Exception\ExtensionNotLoadedException("Missing 'zend_shm_cache_*' functions");
} elseif (PHP_SAPI == 'cli') {
throw new Exception\ExtensionNotLoadedException("Zend server data cache isn't available on cli");
}
parent::__construct($options);
}
/* FlushableInterface */
/**
* Flush the whole storage
*
* @return bool
*/
public function flush()
{
return zend_shm_cache_clear();
}
/* ClearByNamespaceInterface */
/**
* Remove items of given namespace
*
* @param string $namespace
* @return bool
*/
public function clearByNamespace($namespace)
{
$namespace = (string) $namespace;
if ($namespace === '') {
throw new Exception\InvalidArgumentException('No namespace given');
}
return zend_shm_cache_clear($namespace);
}
/* TotalSpaceCapableInterface */
/**
* Get total space in bytes
*
* @return int
*/
public function getTotalSpace()
{
return (int) ini_get('zend_datacache.shm.memory_cache_size') * 1048576;
}
/* internal */
/**
* Store data into Zend Data SHM Cache
*
* @param string $internalKey
* @param mixed $value
* @param int $ttl
* @return void
* @throws Exception\RuntimeException
*/
protected function zdcStore($internalKey, $value, $ttl)
{
if (!zend_shm_cache_store($internalKey, $value, $ttl)) {
$valueType = gettype($value);
throw new Exception\RuntimeException(
"zend_shm_cache_store($internalKey, <{$valueType}>, {$ttl}) failed"
);
}
}
/**
* Fetch a single item from Zend Data SHM Cache
*
* @param string $internalKey
* @return mixed The stored value or NULL if item wasn't found
* @throws Exception\RuntimeException
*/
protected function zdcFetch($internalKey)
{
return zend_shm_cache_fetch((string) $internalKey);
}
/**
* Fetch multiple items from Zend Data SHM Cache
*
* @param array $internalKeys
* @return array All found items
* @throws Exception\RuntimeException
*/
protected function zdcFetchMulti(array $internalKeys)
{
$items = zend_shm_cache_fetch($internalKeys);
if ($items === false) {
throw new Exception\RuntimeException("zend_shm_cache_fetch(<array>) failed");
}
return $items;
}
/**
* Delete data from Zend Data SHM Cache
*
* @param string $internalKey
* @return bool
* @throws Exception\RuntimeException
*/
protected function zdcDelete($internalKey)
{
return zend_shm_cache_delete($internalKey);
}
}
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