public async void StopAtExplicitOffsetOnEmptyTopic()
{
kafka4net.Tracing.EtwTrace.Marker("StopAtExplicitOffsetOnEmptyTopic");
// create new topic with 3 partitions
var topic = "part33." + _rnd.Next();
VagrantBrokerUtil.CreateTopic(topic, 3, 3);
var offsetFetchCluster = new Cluster(_seed2Addresses);
await offsetFetchCluster.ConnectAsync();
await Task.Delay(TimeSpan.FromSeconds(1));
var offsets = (await offsetFetchCluster.FetchPartitionOffsetsAsync(topic, ConsumerLocation.TopicEnd));
_log.Info("Sum of offsets {0}. Raw: {1}", offsets.Partitions.Sum(p => offsets.NextOffset(p)), offsets);
var startStopProvider = new StartAndStopAtExplicitOffsets(offsets, offsets);
_log.Info("Attempting to consume {0} messages and stop at {1}", 0, offsets);
var consumer = new Consumer(new ConsumerConfiguration(_seed2Addresses, topic, startStopProvider, stopPosition: startStopProvider));
var startTime = DateTime.Now;
var timeout = startTime.AddSeconds(30);
var messages = await consumer.OnMessageArrived.TakeUntil(timeout).ToList();
_log.Info("Finished");
Assert.IsTrue(DateTime.Now < timeout);
Assert.AreEqual(0, messages.Count);
consumer.Dispose();
kafka4net.Tracing.EtwTrace.Marker("/StopAtExplicitOffsetOnEmptyTopic");
}
public async void StartAndStopAtExplicitOffset()
{
kafka4net.Tracing.EtwTrace.Marker("StartAndStopAtExplicitOffset");
// create new topic with 3 partitions
var topic = "part33." + _rnd.Next();
VagrantBrokerUtil.CreateTopic(topic, 3, 3);
// fill it out with 10K messages
const int count = 10 * 1000;
var producer = new Producer(_seed2Addresses, new ProducerConfiguration(topic));
await producer.ConnectAsync();
var sentMessagesObservable = Observable.FromEvent<Message[]>(evtHandler => producer.OnSuccess += evtHandler, evtHandler => { })
.SelectMany(msgs => msgs)
.Take(count)
.TakeUntil(DateTime.Now.AddSeconds(10))
.ToList();
_log.Info("Sending data");
Enumerable.Range(1, count).
Select(i => new Message { Value = BitConverter.GetBytes(i) }).
ForEach(producer.Send);
var sentMsgs = await sentMessagesObservable;
_log.Info("Producer sent {0} messages.", sentMsgs.Count);
_log.Debug("Closing producer");
await producer.CloseAsync(TimeSpan.FromSeconds(5));
var offsetFetchCluster = new Cluster(_seed2Addresses);
await offsetFetchCluster.ConnectAsync();
await Task.Delay(TimeSpan.FromSeconds(1));
var offsets = (await offsetFetchCluster.FetchPartitionOffsetsAsync(topic, ConsumerLocation.TopicEnd));
_log.Info("Sum of offsets {0}. Raw: {1}", offsets.Partitions.Sum(p => offsets.NextOffset(p)), offsets);
// consume first 300 for each partition
var offsetStarts = new TopicPartitionOffsets(topic, offsets.GetPartitionsOffset.ToDictionary(pair => pair.Key, pair => pair.Value > 300 ? 300 : pair.Value));
var offsetStops = new TopicPartitionOffsets(topic, offsets.GetPartitionsOffset.ToDictionary(pair => pair.Key, pair => pair.Value > 600 ? 600 : pair.Value));
var numMessages = offsetStops.MessagesSince(offsetStarts);
var startStopProvider = new StartAndStopAtExplicitOffsets(offsetStarts, offsetStops);
_log.Info("Attempting to consume {0} messages and stop at {1}", numMessages, offsetStops);
var consumer = new Consumer(new ConsumerConfiguration(_seed2Addresses, topic, startStopProvider, stopPosition: startStopProvider));
var messages = await consumer.OnMessageArrived.ToList();
consumer.Dispose();
Assert.AreEqual(numMessages, messages.Count);
kafka4net.Tracing.EtwTrace.Marker("/StartAndStopAtExplicitOffset");
}
