private ReadAllPage Read(AllStreamPosition from)
{
var maxPosition = MaxPosition;
_writeLine($"From {from}, Max {maxPosition}");
if (from > MaxPosition)
{
var page = new ReadAllPage(from, from, true, new Envelope[0]);
_writeLine(page.ToString());
return(page);
}
var messages = Enumerable.Range(0, 10)
.Where(x => x <= maxPosition - from.ToInt64())
.Select(x => new Envelope(from.Shift(x), x))
.ToArray();
bool isEnd = !messages.Any() || messages.Last().Checkpoint.ToInt64() == maxPosition;
var result = new ReadAllPage(
from,
messages.Any() ? messages.Last().Checkpoint.Shift() : from,
isEnd,
messages);
_writeLine(result.ToString());
return(result);
}
public PollingNotifierTests()
{
_currentPosition = AllStreamPosition.None;
_notifier = new PollingNotifier(
_ => _currentPosition.ToInt64() != 9999
? Task.FromResult(_currentPosition)
: throw new InvalidOperationException("Error happened"),
(ex, p) =>
{
_error.SetResult(ex); // this actually fails 2nd+ time (intentional)
return(Task.CompletedTask);
},
interval: Interval);
}
public async Task Checkpoint_is_stored_on_commit()
{
var expected = new AllStreamPosition(10);
using (var cpStore = Util.BuildCheckpointStore())
using (var sut = new CheckpointProjection(new DelegateProjection(), cpStore))
{
await sut.Project(new Envelope(expected, null));
await sut.Commit();
cpStore.Read().ShouldBe(expected.ToInt64());
}
}
public Task <ReadAllPage> ReadForward(
AllStreamPosition from = default(AllStreamPosition),
int batchSize = 10,
CancellationToken cancellationToken = default(CancellationToken))
{
var pairs = _allStream.ReadAfter(from.ToInt64() - 1, batchSize);
var messages = pairs.Select(p => new Envelope(
TranslateKey(p.Key),
Serializer.DeserializeJson <DocumentSaved>(p.Value)))
.ToArray();
if (messages.Length == 0)
{
return(Task.FromResult(new ReadAllPage(from, from, true, new Envelope[0])));
}
var next = messages.Last().Checkpoint.Shift();
var isEnd = _allStream.GetLastCheckpoint().Key < next;
return(Task.FromResult(new ReadAllPage(from, next, isEnd, messages)));
}