public void lowest_works_on_add()
{
var id = Guid.NewGuid();
var cache = new OutstandingMessageCache();
cache.StartMessage(new OutstandingMessage(id, null, Helper.BuildFakeEvent(id, "type", "name", 10), 0), DateTime.Now);
Assert.AreEqual(10, cache.GetLowestPosition());
}
public void TryMarkCheckpoint(bool isTimeCheck)
{
lock (_lock)
{
var lowest = _outstandingMessages.GetLowestPosition();
//TODO? COMPETING better to make -1? as of now we are inclusive of checkpoint.
var lowestBufferedRetry = _streamBuffer.GetLowestRetry();
lowest = Math.Min(lowest, lowestBufferedRetry);
if (lowest == int.MinValue)
{
lowest = _lastKnownMessage;
}
//no outstanding messages. in this case we can say that the last known
//event would be our checkpoint place (we have already completed it)
var difference = lowest - _lastCheckPoint;
var now = DateTime.Now;
var timedifference = now - _lastCheckPointTime;
if (timedifference < _settings.CheckPointAfter && difference < _settings.MaxCheckPointCount)
{
return;
}
if ((difference >= _settings.MinCheckPointCount && isTimeCheck) ||
difference >= _settings.MaxCheckPointCount)
{
_lastCheckPointTime = now;
_lastCheckPoint = lowest;
_settings.CheckpointWriter.BeginWriteState(lowest);
_statistics.SetLastCheckPoint(lowest);
}
}
}
public void TryMarkCheckpoint(bool isTimeCheck)
{
lock (_lock) {
var lowest = _outstandingMessages.GetLowestPosition() - 1;
// Subtract 1 from retry and outstanding as those messages have not been processed yet.
var lowestBufferedRetry = StreamBuffer.GetLowestRetry() - 1;
lowest = Math.Min(lowest, lowestBufferedRetry);
if (lowest == long.MaxValue - 1)
{
lowest = _lastKnownMessage;
}
if (lowest == -1)
{
return;
}
//no outstanding messages. in this case we can say that the last known
//event would be our checkpoint place (we have already completed it)
var difference = lowest - _lastCheckPoint;
var now = DateTime.UtcNow;
var timedifference = now - _lastCheckPointTime;
if (timedifference < _settings.CheckPointAfter && difference < _settings.MaxCheckPointCount)
{
return;
}
if ((difference >= _settings.MinCheckPointCount && isTimeCheck) ||
difference >= _settings.MaxCheckPointCount)
{
_lastCheckPointTime = now;
_lastCheckPoint = lowest;
_settings.CheckpointWriter.BeginWriteState(lowest);
_statistics.SetLastCheckPoint(lowest);
}
}
}
public void adding_an_item_causes_count_to_go_up()
{
var id = Guid.NewGuid();
var cache = new OutstandingMessageCache();
cache.StartMessage(new OutstandingMessage(id, null, Helper.BuildFakeEvent(id, "type", "name", 0), 0), DateTime.Now);
Assert.AreEqual(1, cache.Count);
Assert.AreEqual(0, cache.GetLowestPosition());
}
public void get_expired_messages_returns_min_value_on_empty_cache()
{
var cache = new OutstandingMessageCache();
Assert.AreEqual(0, cache.GetMessagesExpiringBefore(DateTime.Now).Count());
Assert.AreEqual(int.MinValue, cache.GetLowestPosition());
}
public void lowest_on_empty_cache_returns_min()
{
var cache = new OutstandingMessageCache();
Assert.AreEqual(int.MinValue, cache.GetLowestPosition());
}
