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<?php
namespace Elastica\Transport;
use Elastica\Exception\Connection\MemcacheException;
use Elastica\Exception\InvalidException;
use Elastica\Exception\PartialShardFailureException;
use Elastica\Exception\ResponseException;
use Elastica\JSON;
use Elastica\Request;
use Elastica\Response;
/**
* Elastica Memcache Transport object.
*
* @author Nicolas Ruflin <spam@ruflin.com>
*
* @deprecated The memcached transport is deprecated as of ES 1.5, and will be removed in ES 2.0
*/
class Memcache extends AbstractTransport
{
const MAX_KEY_LENGTH = 250;
/**
* Makes calls to the elasticsearch server.
*
* @param \Elastica\Request $request
* @param array $params Host, Port, ...
*
* @throws \Elastica\Exception\ResponseException
* @throws \Elastica\Exception\InvalidException
*
* @return \Elastica\Response Response object
*/
public function exec(Request $request, array $params)
{
$memcache = new \Memcache();
$memcache->connect($this->getConnection()->getHost(), $this->getConnection()->getPort());
$data = $request->getData();
$content = '';
if (!empty($data) || '0' === $data) {
if (is_array($data)) {
$content = JSON::stringify($data);
} else {
$content = $data;
}
// Escaping of / not necessary. Causes problems in base64 encoding of files
$content = str_replace('\/', '/', $content);
}
$responseString = '';
$start = microtime(true);
switch ($request->getMethod()) {
case Request::POST:
case Request::PUT:
$key = $request->getPath();
$this->_checkKeyLength($key);
$memcache->set($key, $content);
break;
case Request::GET:
$key = $request->getPath().'?source='.$content;
$this->_checkKeyLength($key);
$responseString = $memcache->get($key);
break;
case Request::DELETE:
$key = $request->getPath().'?source='.$content;
$this->_checkKeyLength($key);
$responseString = $memcache->delete($key);
break;
default:
case Request::HEAD:
throw new InvalidException('Method '.$request->getMethod().' is not supported in memcache transport');
}
$end = microtime(true);
$response = new Response($responseString);
$response->setQueryTime($end - $start);
if ($response->hasError()) {
throw new ResponseException($request, $response);
}
if ($response->hasFailedShards()) {
throw new PartialShardFailureException($request, $response);
}
return $response;
}
/**
* Check if key that will be used dont exceed 250 symbols.
*
* @param string $key
*
* @throws Elastica\Exception\Connection\MemcacheException If key is too long
*/
private function _checkKeyLength($key)
{
if (strlen($key) >= self::MAX_KEY_LENGTH) {
throw new MemcacheException('Memcache key is too long');
}
}
}
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