private function loadTopicDetail(array $topics)
{
if ($this->client === null) {
throw new Exception('client was not provided');
}
$response = null;
foreach ($this->hostList as $host) {
try {
$response = null;
$stream = $this->client->getStream($host);
$conn = $stream['stream'];
$encoder = new Protocol\Encoder($conn);
$encoder->metadataRequest($topics);
$decoder = new Protocol\Decoder($conn);
$response = $decoder->metadataResponse();
$this->client->freeStream($stream['key']);
break;
} catch (Exception $e) {
// keep trying
}
}
if ($response) {
// Merge arrays using "+" operator to preserve key (which are broker IDs)
// instead of array_merge (which reindex numeric keys)
$this->brokers = $response['brokers'] + $this->brokers;
$this->topics = array_merge($response['topics'], $this->topics);
} else {
throw new Exception('Could not connect to any kafka brokers');
}
}
