/**
* Processes the provided Carrot2 job.
*
* @return returns Carrot2Result with processing results
* @throws Carrot2Exception in case of unrecoverable errors, e.g. no connection to DCS
*/
public function cluster(Carrot2Job $job)
{
$curl = curl_init($this->baseurl);
// Prepare request parameters
$fields = array_merge($job->getAttributes(), array('dcs.output.format' => 'XML'));
$documents = $job->getDocuments();
if (count($documents) > 0) {
$fields['dcs.c2stream'] = $this->generateXml($documents);
}
self::addIfNotNull($fields, 'dcs.source', $job->getSource());
self::addIfNotNull($fields, 'dcs.algorithm', $job->getAlgorithm());
self::addIfNotNull($fields, 'query', $job->getQuery());
// Make POST request
curl_setopt_array($curl, array(CURLOPT_POST => true, CURLOPT_HTTPHEADER => array('Content-Type: multipart/formdata'), CURLOPT_HEADER => false, CURLOPT_RETURNTRANSFER => true, CURLOPT_POSTFIELDS => $fields));
$response = curl_exec($curl);
$error = curl_errno($curl);
if ($error !== 0) {
throw new Carrot2Exception(curl_error($curl));
}
$httpStatus = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($httpStatus >= 400) {
throw new Carrot2Exception('HTTP error occurred, error code: ' . $httpStatus);
}
return $this->extractResponse($response);
}
