private function startFetching(ConsumerContext $context, array $topics, $maxFetchSize, $offsetReset)
{
$context->close();
$streams = array();
foreach ($topics as $topic) {
$partitions = $this->getOwnedPartitions($topic);
$offsets = $this->metadata->getTopicOffsets($this->groupId, $topic);
foreach ($partitions as $vpId => $virtualPartition) {
$partition = $virtualPartition['partition'];
$broker = $this->getKafkaByBrokerId($virtualPartition['broker']);
$consumer = $broker->createConsumer();
if (!isset($offsets[$virtualPartition['id']])) {
$offset = $offsetReset;
} else {
$offset = $offsets[$virtualPartition['id']];
$ofsr = $consumer->offsets($topic, $partition, \Kafka\Kafka::OFFSETS_EARLIEST);
if ($offset < array_shift($ofsr)) {
$offset = $offsetReset;
} else {
$ofsr = $consumer->offsets($topic, $partition, \Kafka\Kafka::OFFSETS_LATEST);
if ($offset > array_shift($ofsr)) {
$offset = $offsetReset;
}
}
}
$stream = new MessageStream($this->metadata, $this->groupId, $consumer, $topic, $virtualPartition['broker'], $partition, $maxFetchSize, $offset);
$streams[] = $stream;
}
}
$context->assignStreams($streams);
}
