/// <inheritdoc />
public async Task <FeatureDefinition> GetFeatureDefinitionAsync(string featureName,
CancellationToken cancellationToken = default)
{
if (featureName == null)
{
throw new ArgumentNullException(nameof(featureName));
}
IFeatureManagementAppTierAPI featureApi = CreateFeatureManagementApi();
var feature = await featureApi.GetFeatureByNameAsync(featureName, cancellationToken)
.ConfigureAwait(false) as Feature;
if (feature == null)
{
throw new FeatureManagementException(FeatureManagementError.MissingFeature,
$"Feature {featureName} not found");
}
FeatureDefinition definition = _definitions?.GetOrAdd(featureName, _ => ReadFeatureDefinition(feature));
return(definition);
}