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AbstractZendServer.php
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AbstractZendServer.php
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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) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @package Zend_Cache
*/
namespace Zend\Cache\Storage\Adapter;
use stdClass;
use Zend\Cache\Exception;
use Zend\Cache\Storage\Capabilities;
/**
* @category Zend
* @package Zend_Cache
* @subpackage Storage
*/
abstract class AbstractZendServer extends AbstractAdapter
{
/**
* The namespace separator used on Zend Data Cache functions
*
* @var string
*/
const NAMESPACE_SEPARATOR = '::';
/* reading */
/**
* Internal method to get an item.
*
* @param string $normalizedKey
* @param boolean $success
* @param mixed $casToken
* @return mixed Data on success, null on failure
* @throws Exception\ExceptionInterface
*/
protected function internalGetItem(& $normalizedKey, & $success = null, & $casToken = null)
{
$prefix = $this->getOptions()->getNamespace() . self::NAMESPACE_SEPARATOR;
$internalKey = $prefix . $normalizedKey;
$result = $this->zdcFetch($internalKey);
if ($result === false) {
$success = false;
$result = null;
} else {
$success = true;
$casToken = $result;
}
return $result;
}
/**
* Internal method to get multiple items.
*
* @param array $normalizedKeys
* @return array Associative array of keys and values
* @throws Exception\ExceptionInterface
*/
protected function internalGetItems(array & $normalizedKeys)
{
$prefix = $this->getOptions()->getNamespace() . self::NAMESPACE_SEPARATOR;
$prefixL = strlen($prefix);
$internalKeys = array();
foreach ($normalizedKeys as $normalizedKey) {
$internalKeys[] = $prefix . $normalizedKey;
}
$fetch = $this->zdcFetchMulti($internalKeys);
$result = array();
foreach ($fetch as $k => & $v) {
$result[ substr($k, $prefixL) ] = $v;
}
return $result;
}
/**
* Internal method to test if an item exists.
*
* @param string $normalizedKey
* @return boolean
* @throws Exception\ExceptionInterface
*/
protected function internalHasItem(& $normalizedKey)
{
$prefix = $this->getOptions()->getNamespace() . self::NAMESPACE_SEPARATOR;
return ($this->zdcFetch($prefix . $normalizedKey) !== false);
}
/**
* Internal method to test multiple items.
*
* @param array $normalizedKeys
* @return array Array of found keys
* @throws Exception\ExceptionInterface
*/
protected function internalHasItems(array & $normalizedKeys)
{
$prefix = $this->getOptions()->getNamespace() . self::NAMESPACE_SEPARATOR;
$prefixL = strlen($prefix);
$internalKeys = array();
foreach ($normalizedKeys as $normalizedKey) {
$internalKeys[] = $prefix . $normalizedKey;
}
$fetch = $this->zdcFetchMulti($internalKeys);
$result = array();
foreach ($fetch as $internalKey => & $value) {
$result[] = substr($internalKey, $prefixL);
}
return $result;
}
/**
* Get metadata for multiple items
*
* @param array $normalizedKeys
* @return array Associative array of keys and metadata
*
* @triggers getMetadatas.pre(PreEvent)
* @triggers getMetadatas.post(PostEvent)
* @triggers getMetadatas.exception(ExceptionEvent)
*/
protected function internalGetMetadatas(array & $normalizedKeys)
{
$prefix = $this->getOptions()->getNamespace() . self::NAMESPACE_SEPARATOR;
$prefixL = strlen($prefix);
$internalKeys = array();
foreach ($normalizedKeys as $normalizedKey) {
$internalKeys[] = $prefix . $normalizedKey;
}
$fetch = $this->zdcFetchMulti($internalKeys);
$result = array();
foreach ($fetch as $internalKey => $value) {
$result[ substr($internalKey, $prefixL) ] = array();
}
return $result;
}
/* writing */
/**
* Internal method to store an item.
*
* @param string $normalizedKey
* @param mixed $value
* @return boolean
* @throws Exception\ExceptionInterface
*/
protected function internalSetItem(& $normalizedKey, & $value)
{
$options = $this->getOptions();
$internalKey = $options->getNamespace() . self::NAMESPACE_SEPARATOR . $normalizedKey;
$this->zdcStore($internalKey, $value, $options->getTtl());
return true;
}
/**
* Internal method to remove an item.
*
* @param string $normalizedKey
* @return boolean
* @throws Exception\ExceptionInterface
*/
protected function internalRemoveItem(& $normalizedKey)
{
$internalKey = $this->getOptions()->getNamespace() . self::NAMESPACE_SEPARATOR . $normalizedKey;
return $this->zdcDelete($internalKey);
}
/* status */
/**
* Internal method to get capabilities of this adapter
*
* @return Capabilities
*/
protected function internalGetCapabilities()
{
if ($this->capabilities === null) {
$this->capabilityMarker = new stdClass();
$this->capabilities = new Capabilities(
$this,
$this->capabilityMarker,
array(
'supportedDatatypes' => array(
'NULL' => true,
'boolean' => true,
'integer' => true,
'double' => true,
'string' => true,
'array' => true,
'object' => 'object',
'resource' => false,
),
'supportedMetadata' => array(),
'maxTtl' => 0,
'staticTtl' => true,
'ttlPrecision' => 1,
'useRequestTime' => false,
'expiredRead' => false,
'maxKeyLength' => 0,
'namespaceIsPrefix' => true,
'namespaceSeparator' => self::NAMESPACE_SEPARATOR,
)
);
}
return $this->capabilities;
}
/* internal wrapper of zend_[disk|shm]_cache_* functions */
/**
* Store data into Zend Data Cache (zdc)
*
* @param string $internalKey
* @param mixed $value
* @param int $ttl
* @return void
* @throws Exception\RuntimeException
*/
abstract protected function zdcStore($internalKey, $value, $ttl);
/**
* Fetch a single item from Zend Data Cache (zdc)
*
* @param string $internalKey
* @return mixed The stored value or FALSE if item wasn't found
* @throws Exception\RuntimeException
*/
abstract protected function zdcFetch($internalKey);
/**
* Fetch multiple items from Zend Data Cache (zdc)
*
* @param array $internalKeys
* @return array All found items
* @throws Exception\RuntimeException
*/
abstract protected function zdcFetchMulti(array $internalKeys);
/**
* Delete data from Zend Data Cache (zdc)
*
* @param string $internalKey
* @return boolean
* @throws Exception\RuntimeException
*/
abstract protected function zdcDelete($internalKey);
}