/**
* Perform a search and return record collection.
*
* @param AbstractQuery $query Search query
* @param integer $offset Search offset
* @param integer $limit Search limit
* @param ParamBag $params Search backend parameters
*
* @return RecordCollectionInterface
*/
public function search(AbstractQuery $query, $offset, $limit, ParamBag $params = null)
{
$baseParams = $this->getQueryBuilder()->build($query);
if (null !== $params) {
$baseParams->mergeWith($params);
}
$this->connector->search($baseParams);
/* Pazpar2 does not return all results immediately. Rather, we need to
* occassionally check with the Pazpar2 server on the status of the
* search.
*
* This loop will continue to wait until the configured level of
* progress is reached or until the maximum query time has passed at
* which time the existing results will be returned.
*/
$queryStart = time();
$progress = $this->getSearchProgress();
while ($progress < $this->progressTarget && time() - $queryStart < $this->maxQueryTime) {
sleep(1);
$progress = $this->getSearchProgress();
}
$showParams = new ParamBag(['block' => 1, 'num' => $limit, 'start' => $offset]);
$response = $this->connector->show($showParams);
$hits = isset($response->hit) ? $response->hit : [];
$collection = $this->createRecordCollection($hits, intval($response->merged), $offset);
$this->injectSourceIdentifier($collection);
return $collection;
}
