/**
* Exports es index to provided file.
*
* @param Manager $manager
* @param string $filename
* @param array $types
* @param int $chunkSize
* @param OutputInterface $output
*/
public function exportIndex(Manager $manager, $filename, $types, $chunkSize, OutputInterface $output)
{
$params = ['search_type' => 'scan', 'scroll' => '5m', 'size' => $chunkSize, 'source' => true, 'body' => ['query' => ['match_all' => []]], 'index' => $manager->getIndexName(), 'type' => $types];
$results = new SearchHitIterator(new SearchResponseIterator($manager->getClient(), $params));
$progress = new ProgressBar($output, $results->count());
$progress->setRedrawFrequency(100);
$progress->start();
$metadata = ['count' => $results->count(), 'date' => date(\DateTime::ISO8601)];
$writer = $this->getWriter($this->getFilePath($filename), $metadata);
foreach ($results as $data) {
$doc = array_intersect_key($data, array_flip(['_id', '_type', '_source', 'fields']));
$writer->push($doc);
$progress->advance();
}
$writer->finalize();
$progress->finish();
$output->writeln('');
}
