public virtual async Task <T> GetOrAddAsync <T>(string key, Func <ICacheEntry, Task <T> > addItemFactory)
{
ValidateKey(key);
T cacheItem;
await _lock.WaitAsync().ConfigureAwait(false);
try
{
cacheItem = await CacheProvider.GetOrCreateAsync <T>(key, async (entry) =>
{
// thread safety is up to the provider
var result = await addItemFactory(entry);
EnsureEvictionCallbackDoesNotReturnTheAsyncOrLazy <T>(entry.PostEvictionCallbacks);
return(result);
});
}
finally
{
_lock.Release();
}
return(cacheItem);
}
protected async Task <TModel> GetOrCreateCacheItemAsync <TModel, TKey>(TKey id,
Func <TKey, CacheItem, Task <TModel> > factory,
DateTimeOffset?absoluteExpiration = null) where TModel : IModelKey <TKey>
{
return(await CacheProvider.GetOrCreateAsync(id, factory, absoluteExpiration));
}