/// <inheritdoc/> public FeatureFlagsState AllFlagsState(User user, params FlagsStateOption[] options) { if (IsOffline()) { Log.Warn("AllFlagsState() was called when client is in offline mode. Returning empty state."); return(new FeatureFlagsState(false)); } if (!Initialized()) { if (_featureStore.Initialized()) { Log.Warn("AllFlagsState() called before client initialized; using last known values from feature store"); } else { Log.Warn("AllFlagsState() called before client initialized; feature store unavailable, returning empty state"); return(new FeatureFlagsState(false)); } } if (user == null || user.Key == null) { Log.Warn("AllFlagsState() called with null user or null user key. Returning empty state"); return(new FeatureFlagsState(false)); } var state = new FeatureFlagsState(true); var clientSideOnly = FlagsStateOption.HasOption(options, FlagsStateOption.ClientSideOnly); var withReasons = FlagsStateOption.HasOption(options, FlagsStateOption.WithReasons); var detailsOnlyIfTracked = FlagsStateOption.HasOption(options, FlagsStateOption.DetailsOnlyForTrackedFlags); IDictionary <string, FeatureFlag> flags = _featureStore.All(VersionedDataKind.Features); foreach (KeyValuePair <string, FeatureFlag> pair in flags) { var flag = pair.Value; if (clientSideOnly && !flag.ClientSide) { continue; } try { FeatureFlag.EvalResult result = flag.Evaluate(user, _featureStore, EventFactory.Default); state.AddFlag(flag, result.Result.Value.InnerValue, result.Result.VariationIndex, withReasons ? result.Result.Reason : null, detailsOnlyIfTracked); } catch (Exception e) { Log.ErrorFormat("Exception caught for feature flag \"{0}\" when evaluating all flags: {1}", flag.Key, Util.ExceptionMessage(e)); Log.Debug(e.ToString(), e); EvaluationReason reason = new EvaluationReason.Error(EvaluationErrorKind.EXCEPTION); state.AddFlag(flag, null, null, withReasons ? reason : null, detailsOnlyIfTracked); } } return(state); }
private EvaluationDetail <T> Evaluate <T>(string featureKey, User user, LdValue defaultValue, LdValue.Converter <T> converter, bool checkType, EventFactory eventFactory) { T defaultValueOfType = converter.ToType(defaultValue); if (!Initialized()) { if (_featureStore.Initialized()) { Log.Warn("Flag evaluation before client initialized; using last known values from feature store"); } else { Log.Warn("Flag evaluation before client initialized; feature store unavailable, returning default value"); return(new EvaluationDetail <T>(defaultValueOfType, null, new EvaluationReason.Error(EvaluationErrorKind.CLIENT_NOT_READY))); } } FeatureFlag featureFlag = null; try { featureFlag = _featureStore.Get(VersionedDataKind.Features, featureKey); if (featureFlag == null) { Log.InfoFormat("Unknown feature flag {0}; returning default value", featureKey); _eventProcessor.SendEvent(eventFactory.NewUnknownFeatureRequestEvent(featureKey, user, defaultValue, EvaluationErrorKind.FLAG_NOT_FOUND)); return(new EvaluationDetail <T>(defaultValueOfType, null, new EvaluationReason.Error(EvaluationErrorKind.FLAG_NOT_FOUND))); } if (user == null || user.Key == null) { Log.Warn("Feature flag evaluation called with null user or null user key. Returning default"); _eventProcessor.SendEvent(eventFactory.NewDefaultFeatureRequestEvent(featureFlag, user, defaultValue, EvaluationErrorKind.USER_NOT_SPECIFIED)); return(new EvaluationDetail <T>(defaultValueOfType, null, new EvaluationReason.Error(EvaluationErrorKind.USER_NOT_SPECIFIED))); } FeatureFlag.EvalResult evalResult = featureFlag.Evaluate(user, _featureStore, eventFactory); if (!IsOffline()) { foreach (var prereqEvent in evalResult.PrerequisiteEvents) { _eventProcessor.SendEvent(prereqEvent); } } var evalDetail = evalResult.Result; EvaluationDetail <T> returnDetail; if (evalDetail.VariationIndex == null) { returnDetail = new EvaluationDetail <T>(defaultValueOfType, null, evalDetail.Reason); evalDetail = new EvaluationDetail <LdValue>(defaultValue, null, evalDetail.Reason); } else { if (checkType && !defaultValue.IsNull && evalDetail.Value.Type != defaultValue.Type) { Log.ErrorFormat("Expected type: {0} but got {1} when evaluating FeatureFlag: {2}. Returning default", defaultValue.Type, evalDetail.Value.Type, featureKey); _eventProcessor.SendEvent(eventFactory.NewDefaultFeatureRequestEvent(featureFlag, user, defaultValue, EvaluationErrorKind.WRONG_TYPE)); return(new EvaluationDetail <T>(defaultValueOfType, null, new EvaluationReason.Error(EvaluationErrorKind.WRONG_TYPE))); } returnDetail = new EvaluationDetail <T>(converter.ToType(evalDetail.Value), evalDetail.VariationIndex, evalDetail.Reason); } _eventProcessor.SendEvent(eventFactory.NewFeatureRequestEvent(featureFlag, user, evalDetail, defaultValue)); return(returnDetail); } catch (Exception e) { Log.ErrorFormat("Encountered exception in LaunchDarkly client: {0} when evaluating feature key: {1} for user key: {2}", Util.ExceptionMessage(e), featureKey, user.Key); Log.Debug(e.ToString(), e); var reason = new EvaluationReason.Error(EvaluationErrorKind.EXCEPTION); if (featureFlag == null) { _eventProcessor.SendEvent(eventFactory.NewUnknownFeatureRequestEvent(featureKey, user, defaultValue, EvaluationErrorKind.EXCEPTION)); } else { _eventProcessor.SendEvent(eventFactory.NewFeatureRequestEvent(featureFlag, user, new EvaluationDetail <LdValue>(defaultValue, null, reason), defaultValue)); } return(new EvaluationDetail <T>(defaultValueOfType, null, reason)); } }