public async Task StartConsume(string groupId)
{
var conf = new ConsumerConfig
{
GroupId = groupId,
BootstrapServers = KafkaEndpoint,
// 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 <string, string>(conf).Build())
{
c.Subscribe(_subsManager.GetTopics());
try
{
while (true)
{
try
{
var cr = c.Consume();
await ProcessEvent(cr.Key, cr.Value);
Console.WriteLine($"Consumed message '{cr.Key}' at: '{cr.TopicPartitionOffset}'.");
}
catch (ConsumeException e)
{
Console.WriteLine($"Error occured: {e.Error.Reason}");
}
}
}
catch (OperationCanceledException)
{
// Ensure the consumer leaves the group cleanly and final offsets are committed.
c.Close();
}
}
}
