private static async Task RunConsumer(AsyncEventStream <Event> stream)
{
var aggregations = new Dictionary <int, (double sum, int count)>();
try
{
await foreach (var batch in stream.ConfigureAwait(false))
{
foreach (var evt in batch)
{
var aggregation = aggregations.GetValueOrDefault(evt.Id);
aggregations[evt.Id] = (aggregation.sum + evt.Price, aggregation.count + 1);
}
}
}
catch (OperationCanceledException)
{
Console.WriteLine($"Consumer iteration cancelled");
}
Console.WriteLine($"EventCount: {aggregations.Sum(x => x.Value.count)}");
foreach (var(id, aggregation) in aggregations.OrderBy(x => x.Key))
{
Console.WriteLine($"Id: {id}, Average: {aggregation.sum / aggregation.count:N2}");
}
}
public Enumerator(AsyncEventStream <T> asyncEventStream, Sequence sequence, CancellationToken streamCancellationToken, CancellationToken enumeratorCancellationToken)
{
_asyncEventStream = asyncEventStream;
_sequence = sequence;
_linkedTokenSource = CancellationTokenSource.CreateLinkedTokenSource(streamCancellationToken, enumeratorCancellationToken);
_cancellationTokenRegistration = _linkedTokenSource.Token.Register(x => ((IAsyncWaitStrategy)x !).SignalAllWhenBlocking(), asyncEventStream._waitStrategy);
}
public StreamProcessor(AsyncEventStream <PerfEvent> stream)
{
_stream = stream;
}