dialInitial function Viam SDK

Future<ClientChannelBase> dialInitial(
  1. String address,
  2. DialOptions? options,
  3. String sessionCallback()
)

Initial connection to a robot at the provided address with the given options, allowing for specifying of initial connection attempt count and timeout

Implementation

Future<ClientChannelBase> dialInitial(String address, DialOptions? options, String Function() sessionCallback) async {
  final opts = options ?? DialOptions();

  int numAttempts = opts.initialConnectionAttempts;
  if (numAttempts == 0) {
    numAttempts = -1;
  }

  final timeout = opts.timeout;
  opts.timeout = opts.initialConnectionAttemptTimeout;

  while (numAttempts != 0) {
    try {
      final channel = await dial(address, opts, sessionCallback);
      opts.timeout = timeout;
      return channel;
    } catch (e) {
      numAttempts -= 1;
      if (numAttempts == 0) {
        rethrow;
      }
    }
  }

  throw Exception('unreachable');
}