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<?php
namespace Doctrine\Common\Cache;
use Predis\ClientInterface;
use function array_combine;
use function array_filter;
use function array_map;
use function call_user_func_array;
use function serialize;
use function unserialize;
/**
* Predis cache provider.
*/
class PredisCache extends CacheProvider
{
/** @var ClientInterface */
private $client;
public function __construct(ClientInterface $client)
{
$this->client = $client;
}
/**
* {@inheritdoc}
*/
protected function doFetch($id)
{
$result = $this->client->get($id);
if ($result === null) {
return false;
}
return unserialize($result);
}
/**
* {@inheritdoc}
*/
protected function doFetchMultiple(array $keys)
{
$fetchedItems = call_user_func_array([$this->client, 'mget'], array_values($keys));
return array_map('unserialize', array_filter(array_combine($keys, $fetchedItems)));
}
/**
* {@inheritdoc}
*/
protected function doSaveMultiple(array $keysAndValues, $lifetime = 0)
{
if ($lifetime) {
$success = true;
// Keys have lifetime, use SETEX for each of them
foreach ($keysAndValues as $key => $value) {
$response = (string) $this->client->setex($key, $lifetime, serialize($value));
if ($response == 'OK') {
continue;
}
$success = false;
}
return $success;
}
// No lifetime, use MSET
$response = $this->client->mset(array_map(static function ($value) {
return serialize($value);
}, $keysAndValues));
return (string) $response == 'OK';
}
/**
* {@inheritdoc}
*/
protected function doContains($id)
{
return (bool) $this->client->exists($id);
}
/**
* {@inheritdoc}
*/
protected function doSave($id, $data, $lifeTime = 0)
{
$data = serialize($data);
if ($lifeTime > 0) {
$response = $this->client->setex($id, $lifeTime, $data);
} else {
$response = $this->client->set($id, $data);
}
return $response === true || $response == 'OK';
}
/**
* {@inheritdoc}
*/
protected function doDelete($id)
{
return $this->client->del($id) >= 0;
}
/**
* {@inheritdoc}
*/
protected function doDeleteMultiple(array $keys)
{
return $this->client->del($keys) >= 0;
}
/**
* {@inheritdoc}
*/
protected function doFlush()
{
$response = $this->client->flushdb();
return $response === true || $response == 'OK';
}
/**
* {@inheritdoc}
*/
protected function doGetStats()
{
$info = $this->client->info();
return [
Cache::STATS_HITS => $info['Stats']['keyspace_hits'],
Cache::STATS_MISSES => $info['Stats']['keyspace_misses'],
Cache::STATS_UPTIME => $info['Server']['uptime_in_seconds'],
Cache::STATS_MEMORY_USAGE => $info['Memory']['used_memory'],
Cache::STATS_MEMORY_AVAILABLE => false,
];
}
}
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