private JToken Evaluate(string featureKey, User user, JToken defaultValue, JTokenType?expectedType)
{
if (!Initialized())
{
Logger.LogWarning("LaunchDarkly client has not yet been initialized. Returning default");
return(defaultValue);
}
if (user == null || user.Key == null)
{
Logger.LogWarning("Feature flag evaluation called with null user or null user key. Returning default");
sendFlagRequestEvent(featureKey, user, defaultValue, defaultValue, null);
return(defaultValue);
}
try
{
var featureFlag = _featureStore.Get(featureKey);
if (featureFlag == null)
{
Logger.LogWarning("Unknown feature flag " + featureKey + "; returning default value: ");
sendFlagRequestEvent(featureKey, user, defaultValue, defaultValue, null);
return(defaultValue);
}
FeatureFlag.EvalResult evalResult = featureFlag.Evaluate(user, _featureStore);
if (!IsOffline())
{
foreach (var prereqEvent in evalResult.PrerequisiteEvents)
{
_eventStore.Add(prereqEvent);
}
}
if (evalResult.Result != null)
{
if (expectedType != null && !evalResult.Result.Type.Equals(expectedType))
{
Logger.LogError("Expected type: " + expectedType + " but got " + evalResult.GetType() +
" when evaluating FeatureFlag: " + featureKey + ". Returning default");
sendFlagRequestEvent(featureKey, user, defaultValue, defaultValue, featureFlag.Version);
return(defaultValue);
}
sendFlagRequestEvent(featureKey, user, evalResult.Result, defaultValue, featureFlag.Version);
return(evalResult.Result);
}
}
catch (Exception e)
{
Logger.LogError(
String.Format(
"Encountered exception in LaunchDarkly client: {0} when evaluating feature key: {1} for user key: {2}",
e.Message, featureKey, user.Key));
Logger.LogDebug(e.ToString());
}
sendFlagRequestEvent(featureKey, user, defaultValue, defaultValue, null);
return(defaultValue);
}
private JToken Evaluate(string featureKey, User user, JToken defaultValue, JTokenType?expectedType)
{
if (!Initialized())
{
Log.Warn("LaunchDarkly client has not yet been initialized. Returning default");
return(defaultValue);
}
if (user == null || user.Key == null)
{
Log.Warn("Feature flag evaluation called with null user or null user key. Returning default");
sendFlagRequestEvent(featureKey, user, defaultValue, defaultValue, null);
return(defaultValue);
}
try
{
var featureFlag = _featureStore.Get(VersionedDataKind.Features, featureKey);
if (featureFlag == null)
{
Log.InfoFormat("Unknown feature flag {0}; returning default value",
featureKey);
sendFlagRequestEvent(featureKey, user, defaultValue, defaultValue, null);
return(defaultValue);
}
FeatureFlag.EvalResult evalResult = featureFlag.Evaluate(user, _featureStore, _configuration);
if (!IsOffline())
{
foreach (var prereqEvent in evalResult.PrerequisiteEvents)
{
_eventStore.Add(prereqEvent);
}
}
if (evalResult.Result != null)
{
if (expectedType != null && !evalResult.Result.Type.Equals(expectedType))
{
Log.ErrorFormat("Expected type: {0} but got {1} when evaluating FeatureFlag: {2}. Returning default",
expectedType,
evalResult.GetType(),
featureKey);
sendFlagRequestEvent(featureKey, user, defaultValue, defaultValue, featureFlag.Version);
return(defaultValue);
}
sendFlagRequestEvent(featureKey, user, evalResult.Result, defaultValue, featureFlag.Version);
return(evalResult.Result);
}
}
catch (Exception e)
{
Log.ErrorFormat("Encountered exception in LaunchDarkly client: {0} when evaluating feature key: {1} for user key: {2}",
e,
Util.ExceptionMessage(e),
featureKey,
user.Key);
Log.Debug("{0}", e);
}
sendFlagRequestEvent(featureKey, user, defaultValue, defaultValue, null);
return(defaultValue);
}