/**
* Scan key-value indices and return the value of all matching keys
*
* @param string $key
*
* @return string[]
*/
public function scan($key)
{
$cursor = 0;
$results = [];
$connection = $this->client->getConnection();
do {
if ($connection instanceof ReplicationInterface) {
/** @var NodeConnectionInterface[] $slaves */
$slaves = $connection->getSlaves();
if (count($slaves) == 1) {
$slave = $slaves[0];
} elseif ($slaves) {
$slave = $slaves[rand(0, count($slaves) - 1)];
} else {
$slave = $connection->getMaster();
}
$cmd = new KeyScan();
$cmd->setArguments([$cursor, 'MATCH', $key]);
$set = $slave->executeCommand($cmd);
} elseif ($connection instanceof PredisCluster) {
$iterator = $connection->getIterator();
/** @var NodeConnectionInterface $node */
$node = $iterator->current();
$cmd = new KeyScan();
$cmd->setArguments([$cursor, 'MATCH', $key]);
$set = $node->executeCommand($cmd);
} else {
$set = $this->clientCmd('scan', [$cursor, ['MATCH' => $key]]);
}
$cursor = $set[0];
$results = array_merge($results, $set[1]);
} while ($cursor != 0);
return $results;
}
