startHistogramTimer method

Implementation

void startHistogramTimer(
  String key,
  String? fbl,
  String? operation,
  String? view, {
  int? timestamp,
}) {
  if (!_isInitialized || _hub == null) {
    ObslyLogger.warn('MetricsController not initialized');
    return;
  }

  // Check if metrics is enabled
  final config = ConfigController.instance.config;
  if (!(config?.enableMetrics ?? true)) {
    ObslyLogger.debug('Metrics disabled, ignoring startHistogramTimer call');
    return;
  }

  if (!_isTimerSessionValid()) {
    ObslyLogger.warn('Invalid session for histogram timer');
    return;
  }

  try {
    final timerKey = _createTimerKey(key, fbl, operation, view);

    // Check if timer already exists
    if (_histogramTimers.containsKey(timerKey)) {
      ObslyLogger.warn('Timer already started for key: $timerKey');
      return;
    }

    // Store timestamp (use provided timestamp or current time)
    final startTime = timestamp ?? DateTime.now().millisecondsSinceEpoch;
    _histogramTimers[timerKey] = startTime;

    ObslyLogger.debug('📊 Histogram timer started: $timerKey');
  } catch (e) {
    ObslyLogger.error('Error starting histogram timer: $e');
  }
}