public void ConsumerShouldBeAbleToGetCurrentOffsetInformation()
{
using (var router = new BrokerRouter(new KafkaOptions(IntegrationConfig.IntegrationUri)))
using (var producer = new Producer(router))
{
var startOffsets = producer.GetTopicOffsetAsync(IntegrationConfig.IntegrationTopic).Result
.Select(x => new OffsetPosition(x.PartitionId, x.Offsets.Max())).ToArray();
using (var consumer = new BlockingConsumer(new ConsumerOptions(IntegrationConfig.IntegrationTopic, router), startOffsets))
{
for (int i = 0; i < 20; i++)
{
producer.SendMessageAsync(IntegrationConfig.IntegrationTopic, new[] { new Message(i.ToString(), "1") }).Wait();
}
var results = consumer.Consume().Take(20).ToList();
//ensure the produced messages arrived
for (int i = 0; i < 20; i++)
{
Assert.That(results[i].Value.ToUtf8String(), Is.EqualTo(i.ToString()));
}
//the current offsets should be 20 positions higher than start
var currentOffsets = consumer.GetOffsetPosition();
Assert.That(currentOffsets.Sum(x => x.Offset) - startOffsets.Sum(x => x.Offset), Is.EqualTo(20));
}
}
}
public void ConsumerShouldNotLoseMessageWhenBlocked()
{
var testId = Guid.NewGuid().ToString();
using (var router = new BrokerRouter(new KafkaOptions(IntegrationConfig.IntegrationUri)))
using (var producer = new Producer(router))
{
var offsets = producer.GetTopicOffsetAsync(IntegrationConfig.IntegrationTopic).Result;
//create consumer with buffer size of 1 (should block upstream)
using (var consumer = new BlockingConsumer(new ConsumerOptions(IntegrationConfig.IntegrationTopic, router)
{
ConsumerBufferSize = 1
},
offsets.Select(x => new OffsetPosition(x.PartitionId, x.Offsets.Max())).ToArray()))
{
for (int i = 0; i < 20; i++)
{
producer.SendMessageAsync(IntegrationConfig.IntegrationTopic, new[] { new Message(i.ToString(), testId) }).Wait();
}
for (int i = 0; i < 20; i++)
{
var result = consumer.Consume().Take(1).First();
Assert.That(result.Key.ToUtf8String(), Is.EqualTo(testId));
Assert.That(result.Value.ToUtf8String(), Is.EqualTo(i.ToString()));
}
}
}
}
public void CancellationShouldInterruptConsumption()
{
var routerProxy = new BrokerRouterProxy(new MoqMockingKernel());
routerProxy.BrokerConn0.FetchResponseFunction = () => { return(new FetchResponse()); };
var router = routerProxy.Create();
var options = CreateOptions(router);
using (var consumer = new BlockingConsumer(options))
{
var tokenSrc = new CancellationTokenSource();
var consumeTask = Task.Run(() => consumer.Consume(tokenSrc.Token).FirstOrDefault());
//wait until the fake broker is running and requesting fetches
TaskTest.WaitFor(() => routerProxy.BrokerConn0.FetchRequestCallCount > 10);
tokenSrc.Cancel();
Assert.That(
Assert.Throws <AggregateException>(consumeTask.Wait).InnerException,
Is.TypeOf <OperationCanceledException>());
}
}
public void EnsureConsumerDisposesRouter()
{
var router = new MoqMockingKernel().GetMock <IBrokerRouter>();
var consumer = new BlockingConsumer(CreateOptions(router.Object));
using (consumer) { }
router.Verify(x => x.Dispose(), Times.Once());
}
static void Main(string[] args)
{
const string topicName = "TestHarness";
//create an options file that sets up driver preferences
var options = new KafkaOptions(new Uri("http://CSDKAFKA01:9092"), new Uri("http://CSDKAFKA02:9092"))
{
Log = new ConsoleLog()
};
//start an out of process thread that runs a consumer that will write all received messages to the console
Task.Run(() =>
{
var consumer = new BlockingConsumer(new ConsumerOptions(topicName, new BrokerRouter(options))
{
Log = new ConsoleLog()
});
foreach (var data in consumer.Consume())
{
Console.WriteLine("Response: P{0},O{1} : {2}", data.Meta.PartitionId, data.Meta.Offset, data.Value.ToUtf8String());
}
});
//create a producer to send messages with
var producer = new Producer(new BrokerRouter(options))
{
BatchSize = 100,
BatchDelayTime = TimeSpan.FromMilliseconds(2000)
};
//take in console read messages
Console.WriteLine("Type a message and press enter...");
while (true)
{
var message = Console.ReadLine();
if (message == "quit")
{
break;
}
if (string.IsNullOrEmpty(message))
{
//send a random batch of messages
SendRandomBatch(producer, topicName, 200);
}
else
{
producer.SendMessageAsync(topicName, new[] { new Message(message) });
}
}
using (producer)
{
}
}
public void ConsumerShouldCreateTaskForEachBroker()
{
var routerProxy = new BrokerRouterProxy(new MoqMockingKernel());
routerProxy.BrokerConn0.FetchResponseFunction = () => { return(new FetchResponse()); };
var router = routerProxy.Create();
var options = CreateOptions(router);
options.PartitionWhitelist = new List <int>();
using (var consumer = new BlockingConsumer(options))
{
var test = consumer.Consume();
TaskTest.WaitFor(() => consumer.ConsumerTaskCount >= 2);
Assert.That(consumer.ConsumerTaskCount, Is.EqualTo(2));
}
}
public void ConsumerShouldBeAbleToSeekBackToEarlierOffset()
{
var expected = new List <string> {
"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19"
};
var testId = Guid.NewGuid().ToString();
using (var router = new BrokerRouter(new KafkaOptions(IntegrationConfig.IntegrationUri)))
using (var producer = new Producer(router))
{
var offsets = producer.GetTopicOffsetAsync(IntegrationConfig.IntegrationTopic).Result
.Select(x => new OffsetPosition(x.PartitionId, x.Offsets.Max())).ToArray();
using (var consumer = new BlockingConsumer(new ConsumerOptions(IntegrationConfig.IntegrationTopic, router), offsets))
{
for (int i = 0; i < 20; i++)
{
producer.SendMessageAsync(IntegrationConfig.IntegrationTopic, new[] { new Message(i.ToString(), testId) }).Wait();
}
var sentMessages = consumer.Consume().Take(20).ToList();
//ensure the produced messages arrived
Console.WriteLine("Message order: {0}", string.Join(", ", sentMessages.Select(x => x.Value.ToUtf8String()).ToList()));
Assert.That(sentMessages.Count, Is.EqualTo(20));
Assert.That(sentMessages.Select(x => x.Value.ToUtf8String()).ToList(), Is.EqualTo(expected));
Assert.That(sentMessages.Any(x => x.Key.ToUtf8String() != testId), Is.False);
//seek back to initial offset
consumer.SetOffsetPosition(offsets);
var resetPositionMessages = consumer.Consume().Take(20).ToList();
//ensure all produced messages arrive again
Console.WriteLine("Message order: {0}", string.Join(", ", resetPositionMessages.Select(x => x.Value).ToList()));
Assert.That(resetPositionMessages.Count, Is.EqualTo(20));
Assert.That(resetPositionMessages.Select(x => x.Value.ToUtf8String()).ToList(), Is.EqualTo(expected));
Assert.That(resetPositionMessages.Any(x => x.Key.ToUtf8String() != testId), Is.False);
}
}
}
public void EnsureGzipCanDecompressMessageFromKafka()
{
var router = new BrokerRouter(_options);
var producer = new Producer(router);
var offsets = producer.GetTopicOffsetAsync(IntegrationConfig.IntegrationCompressionTopic).Result;
var consumer = new BlockingConsumer(new ConsumerOptions(IntegrationConfig.IntegrationCompressionTopic, router),
offsets.Select(x => new OffsetPosition(x.PartitionId, 0)).ToArray());
var results = consumer.Consume().Take(3).ToList();
for (int i = 0; i < 3; i++)
{
Assert.That(results[i].Value, Is.EqualTo(i.ToString()));
}
using (producer)
using (consumer) { }
}
public async void ConsumerShouldMoveToNextAvailableOffsetWhenQueryingForNextMessage()
{
const int expectedCount = 1000;
var options = new KafkaOptions(IntegrationConfig.IntegrationUri)
{
Log = new ConsoleLog()
};
using (var producerRouter = new BrokerRouter(options))
using (var producer = new Producer(producerRouter))
{
//get current offset and reset consumer to top of log
var offsets = await producer.GetTopicOffsetAsync(IntegrationConfig.IntegrationTopic).ConfigureAwait(false);
using (var consumerRouter = new BrokerRouter(options))
using (var consumer = new BlockingConsumer(new ConsumerOptions(IntegrationConfig.IntegrationTopic, consumerRouter),
offsets.Select(x => new OffsetPosition(x.PartitionId, x.Offsets.Max())).ToArray()))
{
Console.WriteLine("Sending {0} test messages", expectedCount);
var response = await producer.SendMessageAsync(IntegrationConfig.IntegrationTopic,
Enumerable.Range(0, expectedCount).Select(x => new Message(x.ToString())));
Assert.That(response.Any(x => x.Error != (int)ErrorResponseCode.NoError), Is.False, "Error occured sending test messages to server.");
var stream = consumer.Consume();
Console.WriteLine("Reading message back out from consumer.");
var data = stream.Take(expectedCount).ToList();
var consumerOffset = consumer.GetOffsetPosition().OrderBy(x => x.Offset).ToList();
var serverOffset = await producer.GetTopicOffsetAsync(IntegrationConfig.IntegrationTopic).ConfigureAwait(false);
var positionOffset = serverOffset.Select(x => new OffsetPosition(x.PartitionId, x.Offsets.Max()))
.OrderBy(x => x.Offset)
.ToList();
Assert.That(consumerOffset, Is.EqualTo(positionOffset), "The consumerOffset position should match the server offset position.");
Assert.That(data.Count, Is.EqualTo(expectedCount), "We should have received 2000 messages from the server.");
}
}
}
public void ConsumerWithEmptyWhitelistShouldConsumeAllPartition()
{
var routerProxy = new BrokerRouterProxy(new MoqMockingKernel());
var router = routerProxy.Create();
var options = CreateOptions(router);
options.PartitionWhitelist = new List <int>();
using (var consumer = new BlockingConsumer(options))
{
var test = consumer.Consume();
TaskTest.WaitFor(() => consumer.ConsumerTaskCount > 0);
TaskTest.WaitFor(() => routerProxy.BrokerConn0.FetchRequestCallCount > 0);
TaskTest.WaitFor(() => routerProxy.BrokerConn1.FetchRequestCallCount > 0);
Assert.That(consumer.ConsumerTaskCount, Is.EqualTo(2), "Consumer should create one consuming thread for each partition.");
Assert.That(routerProxy.BrokerConn0.FetchRequestCallCount, Is.GreaterThanOrEqualTo(1), "BrokerConn0 not sent FetchRequest");
Assert.That(routerProxy.BrokerConn1.FetchRequestCallCount, Is.GreaterThanOrEqualTo(1), "BrokerConn1 not sent FetchRequest");
}
}
public void ConsumerWhitelistShouldOnlyConsumeSpecifiedPartition()
{
var routerProxy = new BrokerRouterProxy(new MoqMockingKernel());
routerProxy.BrokerConn0.FetchResponseFunction = () => { return(new FetchResponse()); };
var router = routerProxy.Create();
var options = CreateOptions(router);
options.PartitionWhitelist = new List <int> {
0
};
using (var consumer = new BlockingConsumer(options))
{
var test = consumer.Consume();
TaskTest.WaitFor(() => consumer.ConsumerTaskCount > 0);
TaskTest.WaitFor(() => routerProxy.BrokerConn0.FetchRequestCallCount > 0);
Assert.That(consumer.ConsumerTaskCount, Is.EqualTo(1), "Consumer should only create one consuming thread for partition 0.");
Assert.That(routerProxy.BrokerConn0.FetchRequestCallCount, Is.GreaterThanOrEqualTo(1));
Assert.That(routerProxy.BrokerConn1.FetchRequestCallCount, Is.EqualTo(0));
}
}
