public void Fetching_from_given_id_should_return_commit_with_given_id_and_newer()
{
var streamId = Guid.NewGuid();
var firstCommit = streamId.BuildAttempt();
var secondCommit = firstCommit.BuildNextAttempt();
var thirdCommit = secondCommit.BuildNextAttempt();
_sut.Commit(firstCommit);
_sut.Commit(secondCommit);
_sut.Commit(thirdCommit);
var all = _sut.Fetch(0, 100).ToList();
var second = all[all.Count - 2];
second.CommitId.Should().Be(secondCommit.CommitId);
var secondAndLater = _sut.Fetch((long)second.Headers["SequentialId"], 100).ToList();
secondAndLater.Count.Should().Be(2);
second = secondAndLater[0];
second.CommitId.Should().Be(secondCommit.CommitId);
}
public IEnumerable <IProcessingElement> Fetch(string pipelineName, int maxCount)
{
if (_lastCommitSequentialId == EmtpySequentialIdValue)
{
_lastCommitSequentialId = _streamStore.GetLastProcessedSequentialNumber(pipelineName);
}
var commits = _streamStore.Fetch(_lastCommitSequentialId, maxCount);
foreach (var commit in commits)
{
var thisCommitSequentialId = (long)commit.Headers["SequentialId"];
if (_firstCommitFetched && _lastCommitSequentialId == thisCommitSequentialId)
{
continue;
}
_lastCommitSequentialId = thisCommitSequentialId;
foreach (EventMessage eventMessage in commit.Events)
{
var storedEvent = (StoredEvent)eventMessage.Body;
yield return(new SourcedEventProcessingElement(storedEvent.Convert(commit.StreamId)));
}
_firstCommitFetched = true;
}
}