Ejemplo n.º 1
0
        public async Task <long?> CountStreamRemainingEventsAsync(
            StreamCoordinates coordinates,
            StreamShardingSettings shardingSettings,
            CancellationToken cancellationToken = default)
        {
            try
            {
                var endCoordinates = await SeekToEndAsync(shardingSettings, cancellationToken).ConfigureAwait(false);

                var distance = coordinates.DistanceTo(endCoordinates);

                log.Debug(
                    "Stream remaining events: {Count}. Current coordinates: {CurrentCoordinates}, end coordinates: {EndCoordinates}.",
                    distance,
                    coordinates,
                    endCoordinates);

                return(distance);
            }
            catch (Exception e)
            {
                log.Warn(e, "Failed to count remaining events.");
                return(null);
            }
        }
        public void Distance_should_work_correctly()
        {
            var a = new StreamCoordinates(
                new[]
            {
                new StreamPosition {
                    Partition = 0, Offset = 1
                },
                new StreamPosition {
                    Partition = 1, Offset = 100
                }
            });

            var b = new StreamCoordinates(
                new[]
            {
                new StreamPosition {
                    Partition = 1, Offset = 200
                },
                new StreamPosition {
                    Partition = 2, Offset = 2
                }
            });

            a.DistanceTo(b).Should().Be(102);
            b.DistanceTo(a).Should().Be(-99);
        }
        private double?CountStreamRemainingEvents()
        {
            if (coordinates == null)
            {
                return(null);
            }

            var end      = SeekToEndAsync(shardingSettings).GetAwaiter().GetResult();
            var distance = coordinates.DistanceTo(end);

            log.Info(
                "Consumer progress: events remaining: {EventsRemaining}. Current coordinates: {CurrentCoordinates}, end coordinates: {EndCoordinates}.",
                distance,
                coordinates,
                end);

            return(distance);
        }