onStart method

@override Future<bool> onStart()

Callback when this executor is started. Returns true if successfully started, false otherwise.

Implementation

@override
Future<bool> onStart() async {
  _subscription ??= SmartPhoneClientManager()
      .lookupStudyRuntime(
        deployment!.studyDeploymentId,
        deployment!.deviceConfiguration.roleName,
      )
      ?.measurementsByType(configuration!.measureType)
      .distinct()
      .listen((measurement) {
    if (configuration?.triggerCondition == null) {
      // always trigger if the condition is null
      onTrigger();
    } else
    // check the trigger condition
    if (measurement.data.equivalentTo(configuration!.triggerCondition!)) {
      onTrigger();
    }
  });
  return true;
}