public void new_subscription_should_be_healthy()
{
var subscription = new LambdaSubscription(_empty);
Assert.False(subscription.ReadCompleted);
Assert.False(subscription.Failed);
Assert.Null(subscription.LastError);
Assert.Equal(0, subscription.FailedPosition);
}
public async Task should_track_errors()
{
var subscription = new LambdaSubscription(_empty);
var ex = new Exception("message");
await subscription.OnErrorAsync(1, ex);
Assert.True(subscription.Failed);
Assert.Same(ex, subscription.LastError);
Assert.Equal(1, subscription.FailedPosition);
}
public exceptions_should_be_signaled()
{
// write stream out of order to have
// position 1 : index 2
// position 2 : index 1
//
Store.AppendAsync("a", 2, "data b").GetAwaiter().GetResult();
Store.AppendAsync("a", 1, "data a").GetAwaiter().GetResult();
_subscription = new LambdaSubscription(_throw);
}
public async Task <long> GetEventsAsync(string actorName, long indexStart, long indexEnd, Action <object> callback)
{
long lastIndex = -1;
var adapter = new LambdaSubscription(chunk =>
{
lastIndex = chunk.Index;
callback(chunk.Payload);
return(Task.FromResult(true));
});
await _events.ReadForwardAsync(actorName, indexStart, adapter, indexEnd).ConfigureAwait(false);
return(lastIndex); // TODO -> check sources, not really needed imho
}
public async Task should_call_on_start_delegate()
{
long trackedPosition = 0;
var subscription = new LambdaSubscription(_empty)
{
OnStart = position =>
{
trackedPosition = position;
return(Task.CompletedTask);
}
};
await subscription.OnStartAsync(1);
Assert.Equal(1, trackedPosition);
}
public async Task should_call_on_complete_delegate()
{
long trackedPosition = 0;
var subscription = new LambdaSubscription(_empty)
{
OnComplete = position =>
{
trackedPosition = position;
return(Task.CompletedTask);
}
};
await subscription.CompletedAsync(1);
Assert.Equal(1, trackedPosition);
Assert.True(subscription.ReadCompleted);
}
public async Task should_call_on_stop_delegate()
{
long trackedPosition = 0;
var subscription = new LambdaSubscription(_empty)
{
OnStop = position =>
{
trackedPosition = position;
return(Task.CompletedTask);
}
};
await subscription.StoppedAsync(1).ConfigureAwait(false);
Assert.Equal(1, trackedPosition);
Assert.True(subscription.ReadCompleted);
}
public async Task should_intercept_on_error()
{
Exception trackedException = null;
long trackedPosition = 0;
var subscription = new LambdaSubscription(_empty)
{
OnError = (position, exception) =>
{
trackedException = exception;
trackedPosition = position;
return(Task.CompletedTask);
}
};
var ex = new Exception("message");
await subscription.OnErrorAsync(1, ex);
Assert.True(subscription.Failed);
Assert.Same(ex, trackedException);
Assert.Equal(1, trackedPosition);
}
public subscription_events_should_be_signaled()
{
// write stream out of order to have
// position 1 : index 2
// position 2 : index 1
//
Store.AppendAsync("a", 2, "data b").GetAwaiter().GetResult();
Store.AppendAsync("a", 1, "data a").GetAwaiter().GetResult();
_subscription = new LambdaSubscription(_continueToEnd)
{
OnStart = p =>
{
_startedAt = p;
return(Task.CompletedTask);
},
OnComplete = p =>
{
_completedAt = p;
return(Task.CompletedTask);
}
};
}
private void Add(List <LambdaSubscription> subscriptions, S3SubscriptionProperties properties)
{
foreach (var filter in properties.Filters)
{
var subscription = new LambdaSubscription {
FunctionArn = properties.Function,
Events = filter.Events.Select(e => EventType.FindValue(e)).ToList()
};
// check if prefix/suffix filter were provided
if ((filter.Prefix != null) || (filter.Suffix != null))
{
var rules = new List <FilterRule>();
if (filter.Prefix != null)
{
rules.Add(new FilterRule {
Name = "prefix",
Value = filter.Prefix
});
}
if (filter.Suffix != null)
{
rules.Add(new FilterRule {
Name = "suffix",
Value = filter.Suffix
});
}
subscription.Filter = new LambdaFilter {
S3KeyFilter = new S3KeyFilter {
FilterRules = rules
}
};
}
subscriptions.Add(subscription);
}
}
public async Task <IAggregate> GetByIdAsync(Type aggregateType, string id, CancellationToken cancellationToken)
{
if (_trackingAggregates.TryGetValue(id, out IAggregate aggregate))
{
return(aggregate);
}
aggregate = _factory.Create(aggregateType);
var persister = (IEventSourcedAggregate)aggregate;
SnapshotInfo snapshot = null;
if (_snapshots != null && aggregate is ISnapshottable snapshottable)
{
snapshot = await _snapshots.GetLastAsync(id, cancellationToken).ConfigureAwait(false);
if (snapshot != null)
{
//@@REVIEW: invalidate snapshot on false?
snapshottable.TryRestore(snapshot);
}
}
if (!aggregate.IsInitialized)
{
aggregate.Init(id);
}
_trackingAggregates.Add(id, aggregate);
var stream = OpenStream(id);
int readCount = 0;
var subscription = new LambdaSubscription(data =>
{
readCount++;
persister.ApplyChanges((Changeset)data.Payload);
return(Task.FromResult(true));
});
var consumer = ConfigureConsumer(subscription, cancellationToken);
// we use aggregate.Version because snapshot could be rejected
// Starting point is inclusive, so almost one changeset should be loaded
// aggregate will ignore because ApplyChanges is idempotent
await stream.ReadAsync(consumer, aggregate.Version, long.MaxValue, cancellationToken).ConfigureAwait(false);
//Check lambda subscription for errors.
if (subscription.Failed)
{
throw new RepositoryReadException($"Error reading aggregate {id}", subscription.LastError);
}
persister.Loaded();
// no data from stream, we cannot validate the aggregate
if (snapshot != null && readCount == 0)
{
throw new StaleSnapshotException(snapshot.SourceId, snapshot.SourceVersion);
}
return(aggregate);
}
