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);
}
/// <summary> Initialize the wrapper and set <see cref="IsReady"/> to true. </summary>
/// <remarks>
/// Upon failure, logs the exception and tries again after a short delay, forever.
/// </remarks>
private async Task Initialize()
{
while (!_cancel.IsCancellationRequested)
{
try
{
await Wrapper.InitializeAsync(_cancel).ConfigureAwait(false);
_isReady = true;
return;
}
catch (OperationCanceledException) { throw; }
catch (Exception e)
{
_log.Error("Could not initialize EventStreamService", e);
_initFailure = e;
Wrapper.Reset();
}
await Task.Delay(TimeSpan.FromSeconds(5), _cancel).ConfigureAwait(false);
}
}
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);
}
