MemcachedStorage.php
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<?php
/*
* This file is part of the DebugBar package.
*
* (c) 2013 Maxime Bouroumeau-Fuseau
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace DebugBar\Storage;
use Memcached;
/**
* Stores collected data into Memcache using the Memcached extension
*/
class MemcachedStorage implements StorageInterface
{
protected $memcached;
protected $keyNamespace;
/**
* @param Memcached $memcached
*/
public function __construct(Memcached $memcached, $keyNamespace = 'phpdebugbar')
{
$this->memcached = $memcached;
$this->keyNamespace = $keyNamespace;
}
/**
* {@inheritdoc}
*/
public function save($id, $data)
{
$key = $this->createKey($id);
$this->memcached->set($key, $data);
if (!$this->memcached->append($this->keyNamespace, "|$key")) {
$this->memcached->set($this->keyNamespace, $key);
}
}
/**
* {@inheritdoc}
*/
public function get($id)
{
return $this->memcached->get($this->createKey($id));
}
/**
* {@inheritdoc}
*/
public function find(array $filters = array(), $max = 20, $offset = 0)
{
if (!($keys = $this->memcached->get($this->keyNamespace))) {
return array();
}
$results = array();
foreach (explode('|', $keys) as $key) {
if ($data = $this->memcached->get($key)) {
$meta = $data['__meta'];
if ($this->filter($meta, $filters)) {
$results[] = $meta;
}
}
}
return array_slice($results, $offset, $max);
}
/**
* Filter the metadata for matches.
*
* @param array $meta
* @param array $filters
* @return bool
*/
protected function filter($meta, $filters)
{
foreach ($filters as $key => $value) {
if (!isset($meta[$key]) || fnmatch($value, $meta[$key]) === false) {
return false;
}
}
return true;
}
/**
* {@inheritdoc}
*/
public function clear()
{
if (!($keys = $this->memcached->get($this->keyNamespace))) {
return;
}
$this->memcached->delete($this->keyNamespace);
$this->memcached->deleteMulti(explode('|', $keys));
}
/**
* @param string $id
* @return string
*/
protected function createKey($id)
{
return md5("{$this->keyNamespace}.$id");
}
}