Function getReadPreference

src/cmap/wire_protocol/shared.ts:14–29

(options?: ReadPreferenceOption)

}

export function getReadPreference(options?: ReadPreferenceOption): ReadPreference {
  // Default to command version of the readPreference.
  let readPreference = options?.readPreference ?? ReadPreference.primary;

  if (typeof readPreference === 'string') {
    readPreference = ReadPreference.fromString(readPreference);
  }

  if (!(readPreference instanceof ReadPreference)) {
    throw new MongoInvalidArgumentError(
      'Option "readPreference" must be a ReadPreference instance'
    );
  }

  return readPreference;
}

export function isSharded(topologyOrServer?: Topology | Server | Connection): boolean {
  if (topologyOrServer == null) {