public override async Task ReplayMessagesAsync(
IActorContext context,
string persistenceId,
long fromSequenceNr,
long toSequenceNr,
long max,
Action <IPersistentRepresentation> recoveryCallback)
{
RedisValue[] journals = await Database.SortedSetRangeByScoreAsync(_journalHelper.GetJournalKey(persistenceId), fromSequenceNr, toSequenceNr, skip : 0L, take : max);
foreach (var journal in journals)
{
recoveryCallback(_journalHelper.PersistentFromBytes(journal));
}
}
private void Query()
{
switch (_state)
{
case State.Idle:
if (_buffer.Count == 0)
{
// so, we need to fill this buffer
_state = State.Querying;
// Complete stage if fromSequenceNr is higher than toSequenceNr
if (_toSequenceNr < _currentSequenceNr)
{
CompleteStage();
}
_redis.GetDatabase(_database).SortedSetRangeByScoreAsync(
key: _journalHelper.GetJournalKey(_persistenceId),
start: _currentSequenceNr,
stop: Math.Min(_currentSequenceNr + _max - 1, _toSequenceNr),
order: Order.Ascending).ContinueWith(task =>
{
if (!task.IsCanceled || task.IsFaulted)
{
var deserializedEvents = task.Result.Select(e => _journalHelper.PersistentFromBytes(e)).ToList();
_callback(deserializedEvents);
}
else
{
Log.Error(task.Exception, "Error while querying events by persistence identifier");
FailStage(task.Exception);
}
});
}
else
{
// buffer is non empty, let’s deliver buffered data
Deliver();
}
break;
default:
Log.Error($"Unexpected source state when querying: {_state}");
FailStage(new IllegalStateException($"Unexpected source state when querying: {_state}"));
break;
}
}