private static async Task <List <Guid> > GetOldGetMsgIds(GetOldMessagesInput input,
IReliableDictionary2 <Guid, List <Guid> > indexDict, ITransaction tx)
{
if (await indexDict.ContainsKeyAsync(tx, input.Id))
{
var lstMessageIndex = (await indexDict.TryGetValueAsync(tx, input.Id)).Value;
var oldestMsgIndex = lstMessageIndex.IndexOf(input.OldestMsgId);
if (oldestMsgIndex == 0)
{
return(null);
}
var endIndex = oldestMsgIndex - 1;
var startIndex = oldestMsgIndex - MaxMessageAmount;
var amount = MaxMessageAmount;
if (startIndex < 0)
{
startIndex = 0;
amount = endIndex - startIndex + 1;
}
return(lstMessageIndex.GetRange(startIndex, amount));
}
return(null);
}
public Task <bool> ContainsKeyAsync(ITransaction tx, TKey key)
{
return(_dictionary.ContainsKeyAsync(tx, key));
}