public async Task with_restart()
{
var memory = new MemoryStorageDriver();
var cache = new Testing.InMemoryCache();
var ew = new EventStreamWrapper <TstEvent, CheckSequence>(
memory,
new [] { new CheckSequence.Projection() },
cache
);
await ew.AppendEventsAsync(new[] { new TstEvent(1) });
await ew.AppendEventsAsync(new[] { new TstEvent(2) });
await ew.AppendEventsAsync(new[] { new TstEvent(3) });
await ew.TrySaveAsync();
await ew.AppendEventsAsync(new[] { new TstEvent(4) });
await ew.AppendEventsAsync(new[] { new TstEvent(5) });
Assert.Equal(5u, ew.Current.LastEvt);
// try to read:
var ew2 = new EventStreamWrapper <TstEvent, CheckSequence>(
memory, new[] { new CheckSequence.Projection() },
cache);
await ew2.InitializeAsync();
Assert.Equal(5u, ew2.Current.LastEvt);
}
/// <remarks>
/// This constructor is private so that it is obvious (via <c>StartNew</c>)
/// that background tasks are being creatd.
/// </remarks>
private EventStreamService(
StorageConfiguration storage,
IEnumerable <IProjection <TEvent> > projections,
IProjectionCacheProvider projectionCache,
ILogAdapter log,
CancellationToken cancel) : base(TimeSpan.FromSeconds(30), cancel)
{
_log = log;
_cancel = cancel;
Wrapper = new EventStreamWrapper <TEvent, TState>(storage, projections, projectionCache, log);
Quarantine = Wrapper.Quarantine;
Ready = Task.Run(Initialize, cancel);
}
public async Task test(int projectionSeq, int streamSeq, int expectedRequestedDiscardSeq, int expectedResets)
{
if (streamSeq < 0 || projectionSeq < 0 || expectedRequestedDiscardSeq < 0 || expectedResets < 0)
{
throw new Exception("positive int required");
}
var projection = Mock.Of <IReifiedProjection>(proj => proj.Sequence == (uint)projectionSeq);
var stream = new MockStream((uint)streamSeq);
await EventStreamWrapper <object, object> .Catchup(projection, stream);
Assert.Equal((uint)expectedRequestedDiscardSeq, stream.RequestedDiscardSeq);
Assert.Equal(expectedResets, stream.NbResets);
}
public async Task without_restart()
{
var memory = new MemoryStorageDriver();
var ew = new EventStreamWrapper <TstEvent, CheckSequence>(
memory,
new [] { new CheckSequence.Projection() }, null
);
await ew.AppendEventsAsync(new[] { new TstEvent(1) });
await ew.AppendEventsAsync(new[] { new TstEvent(2) });
await ew.AppendEventsAsync(new[] { new TstEvent(3) });
Assert.Equal(3u, ew.Current.LastEvt);
// try to read:
var ew2 = new EventStreamWrapper <TstEvent, CheckSequence>(
memory, new[] { new CheckSequence.Projection() }, null);
await ew2.InitializeAsync();
Assert.Equal(3u, ew2.Current.LastEvt);
}
/// <remarks>
/// This constructor is private so that it is obvious (via <c>StartNew</c>)
/// that background tasks are being creatd.
/// </remarks>
private EventStreamService(
StorageConfiguration storage,
IEnumerable <IProjection <TEvent> > projections,
IProjectionCacheProvider projectionCache,
IEnumerable <Tuple <EventStream <TEvent> .Listener, uint> > events,
ILogAdapter log,
CancellationToken cancel)
{
_log = log;
_cancel = cancel;
Wrapper = new EventStreamWrapper <TEvent, TState>(storage, projections, projectionCache, log);
Quarantine = Wrapper.Quarantine;
if (events != null)
{
foreach (var pair in events)
{
Wrapper.OnEachCommitted(pair.Item1, pair.Item2);
}
}
Ready = Task.Run(Initialize, cancel);
Task.Run(Loop, cancel);
}