public function vary($featureName, array $context = array())
{
$strategy = $this->registry->resolveStrategy($featureName);
$feature = $this->registry->getFeature($featureName);
if (!$strategy) {
throw new \RuntimeException(sprintf("No strategy was found for feature '%s'.", $featureName));
}
if ($userKey = $this->getUserKey() && ($result = $this->memoryAdapter->get($feature, $userKey))) {
return $result;
} else {
$userKey = $this->getUserKey();
$result = $this->decider->decide($strategy, $feature, $context);
if ($userKey) {
$this->memoryAdapter->save($feature, $userKey, $result);
}
}
return $result;
}
