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@tuannguyenssu tuannguyenssu/Program.cs Secret
Last active Sep 25, 2019

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using System;
using System.Threading;
using Confluent.Kafka;
namespace KafkaTest
{
class Program
{
private static void TestProducer()
{
var conf = new ProducerConfig { BootstrapServers = "localhost:9092" };
Action<DeliveryReport<Null, string>> handler = r =>
Console.WriteLine(!r.Error.IsError
? $"Delivered message to {r.TopicPartitionOffset}"
: $"Delivery Error: {r.Error.Reason}");
using (var p = new ProducerBuilder<Null, string>(conf).Build())
{
for (int i=0; i<2; ++i)
{
p.Produce("my-topic", new Message<Null, string> { Value = i.ToString() }, handler);
}
// wait for up to 10 seconds for any inflight messages to be delivered.
p.Flush(TimeSpan.FromSeconds(10));
}
}
private static void TestConsumer()
{
var conf = new ConsumerConfig
{
GroupId = "test-consumer-group",
BootstrapServers = "localhost:9092",
// Note: The AutoOffsetReset property determines the start offset in the event
// there are not yet any committed offsets for the consumer group for the
// topic/partitions of interest. By default, offsets are committed
// automatically, so in this example, consumption will only start from the
// earliest message in the topic 'my-topic' the first time you run the program.
AutoOffsetReset = AutoOffsetReset.Earliest
};
using (var c = new ConsumerBuilder<Ignore, string>(conf).Build())
{
c.Subscribe("my-topic");
CancellationTokenSource cts = new CancellationTokenSource();
Console.CancelKeyPress += (_, e) => {
e.Cancel = true; // prevent the process from terminating.
cts.Cancel();
};
try
{
while (true)
{
try
{
var cr = c.Consume(cts.Token);
Console.WriteLine($"Consumed message '{cr.Value}' at: '{cr.TopicPartitionOffset}'.");
}
catch (ConsumeException e)
{
Console.WriteLine($"Error occured: {e.Error.Reason}");
}
}
}
catch (OperationCanceledException)
{
// Ensure the consumer leaves the group cleanly and final offsets are committed.
c.Close();
}
}
}
static void Main(string[] args)
{
TestProducer();
TestConsumer();
}
}
}
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