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public class KafkaHelper { private string _bootstrapServers; Action<DeliveryReport<Null, string>> _handler; private IProducer<Null, string> _producerBuilder;
public event Action<string> MessageCallback;
public KafkaHelper(string bootstrapServers) { _bootstrapServers = bootstrapServers; }
public void RegisterProducer() { var conf = new ProducerConfig { BootstrapServers = _bootstrapServers };
_handler = r => Console.WriteLine(!r.Error.IsError ? $"Delivered message to {r.TopicPartitionOffset}" : $"Delivery Error: {r.Error.Reason}");
_producerBuilder = new ProducerBuilder<Null, string>(conf).Build(); }
public void RegisterConsumer(string groupId, string topic, AutoOffsetReset autoOffsetReset = AutoOffsetReset.Earliest, KafkaSSL kafkaSSL = null) { var conf = new ConsumerConfig { GroupId = groupId, BootstrapServers = _bootstrapServers, AutoOffsetReset = autoOffsetReset };
if (kafkaSSL != null) { conf.SecurityProtocol = kafkaSSL.SecurityProtocol; conf.SaslMechanism = kafkaSSL.SaslMechanism; conf.SaslUsername = kafkaSSL.SaslUsername; conf.SaslPassword = kafkaSSL.SaslPassword; conf.SslCaLocation = kafkaSSL.SslCaLocation; conf.SslKeystorePassword = kafkaSSL.SslKeystorePassword; conf.SslEndpointIdentificationAlgorithm = kafkaSSL.SslEndpointIdentificationAlgorithm; }
using (var c = new ConsumerBuilder<Ignore, string>(conf).Build()) { c.Subscribe(topic);
CancellationTokenSource cts = new CancellationTokenSource(); Console.CancelKeyPress += (_, e) => { e.Cancel = true; cts.Cancel(); };
try { while (true) { try { var cr = c.Consume(cts.Token); MessageCallback?.Invoke(cr.Value); } catch (ConsumeException e) { Console.WriteLine($"Error occured: {e.Error.Reason}"); } } } catch (OperationCanceledException) { c.Close(); } } }
public void SendMessage(string topic, string message) { _producerBuilder.Produce(topic, new Message<Null, string> { Value = message }, _handler);
_producerBuilder.Flush(TimeSpan.FromSeconds(10)); }
public void Close() { _producerBuilder.Dispose(); } }
public class KafkaSSL { public SecurityProtocol? SecurityProtocol { get; set; } = Confluent.Kafka.SecurityProtocol.SaslSsl;
public SaslMechanism? SaslMechanism { get; set; } = Confluent.Kafka.SaslMechanism.Plain;
public string SaslUsername { get; set; }
public string SaslPassword { get; set; }
public string SslCaLocation { get; set; }
public string SslKeystorePassword { get; set; }
public SslEndpointIdentificationAlgorithm? SslEndpointIdentificationAlgorithm { get; set; } }
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