public void UpdateCache(IUpdateContextCodeFeature update)
{
// ignore updates that aren't for this cache instance
if (update.ContextId != ContextMetadata <TContext> .Id)
{
return;
}
CodeFeatureId codeFeatureId = update.CodeFeatureId;
ICachedContextFeatureState existingContext;
if (_cache.TryGetContextFeatureState(update.ContextKey, out existingContext))
{
ICachedCodeFeatureState existingCode;
if (existingContext.TryGetCodeFeatureState(codeFeatureId, out existingCode))
{
if (existingCode.Enabled == update.Enabled)
{
return;
}
UpdateExistingCodeFeature(update, codeFeatureId, existingContext, existingCode);
}
else
{
AddCodeFeatureState(update, codeFeatureId, existingContext);
}
}
else
{
AddContextFeatureState(update, codeFeatureId);
}
}
void NotifyUpdated(IUpdateContextCodeFeature update, ICachedCodeFeatureState updatedFeatureState)
{
var updatedEvent = new ContextCodeFeatureStateCacheUpdated(update.ContextId, update.ContextKey, updatedFeatureState.Id,
updatedFeatureState.Enabled, update.CommandId);
_cacheUpdated.ForEach(x => x.OnNext(updatedEvent));
}
void AddCodeFeatureState(IUpdateContextCodeFeature update, CodeFeatureId codeFeatureId, ICachedContextFeatureState existingContext)
{
var featureState = new CachedCodeFeatureState(codeFeatureId, update.Enabled);
bool updated = existingContext.TryAdd(codeFeatureId, featureState);
if (updated)
{
NotifyUpdated(update, featureState);
}
}
void AddContextFeatureState(IUpdateContextCodeFeature update, CodeFeatureId codeFeatureId)
{
var featureState = new CachedCodeFeatureState(codeFeatureId, update.Enabled);
var contextFeatureState = new CachedContextFeatureState(Enumerable.Repeat(featureState, 1), update.ContextKey);
bool updated = _cache.TryAdd(update.ContextKey, contextFeatureState);
if (updated)
{
NotifyUpdated(update, featureState);
}
}
