public void NotifyUpdated(IEnumerable <string> identifiers)
{
if (!(identifiers?.Any() ?? false))
{
return;
}
_cacheLock.EnterWriteLock();
try
{
// rebuild items anyway
var lstIdentifiers = identifiers.ToList();
var updatedItems = _cacheProvider.RebuildItems(lstIdentifiers);
var cache = MemoryCache.Default;
if (!(cache[_cacheKey] is IDictionary <string, T> data))
{
return; // nothing to update, cache will be read when next time requested;
}
if (!(_cacheProvider is IPersistentCacheProviderEx <T> _cacheProviderWithDelta))
{
ApplyDelta(data, lstIdentifiers, updatedItems);
return;
}
var lastUpdate = cache[_cacheUpdateNumberKey] as long?;
var(replacedItemsIdentifiers, newItems, lastChange) = _cacheProviderWithDelta.GetDelta(lastUpdate);
ApplyDelta(data, replacedItemsIdentifiers, newItems);
SetCache(cache, lastChange);
}
finally
{
_cacheLock.ExitWriteLock();
}
}
