public async Task <TValue> GetOrAddAsync(ITransaction tx, TKey key, Func <TKey, TValue> valueFactory, TimeSpan timeout, CancellationToken cancellationToken)
{
bool isAdd = false;
TValue value = default(TValue);
var result = await _dictionary.GetOrAddAsync(tx, key, k => { isAdd = true; value = valueFactory(k); return(value); }, timeout, cancellationToken).ConfigureAwait(false);
if (isAdd)
{
await OnAddAsync(tx, key, value, timeout, cancellationToken).ConfigureAwait(false);
}
return(result);
}
private Task <ReliableListMetaData> GetMetadataAsync(ITransaction tx, string key) => _metadataStore.GetOrAddAsync(tx, MakeMetadataKey(key), _ => new ReliableListMetaData());