protected function unixStreamInitializer(ParametersInterface $parameters)
{
if (!isset($parameters->path)) {
throw new \InvalidArgumentException('Missing UNIX domain socket path.');
}
$flags = STREAM_CLIENT_CONNECT;
if (isset($parameters->persistent)) {
if (false !== ($persistent = filter_var($parameters->persistent, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE))) {
$flags |= STREAM_CLIENT_PERSISTENT;
if ($persistent === null) {
throw new \InvalidArgumentException('Persistent connection IDs are not supported when using UNIX domain sockets.');
}
}
}
$resource = $this->createStreamSocket($parameters, "unix://{$parameters->path}", $flags);
return $resource;
}