private void SetHandlers(Confluent.Kafka.ConsumerBuilder <TKey, TValue> builder)
{
if (_options.ErrorHandler != null)
{
builder.SetErrorHandler(_options.ErrorHandler);
}
if (_options.KeyDeserializer != null)
{
builder.SetKeyDeserializer(_options.KeyDeserializer);
}
if (_options.ValueDeserializer != null)
{
builder.SetValueDeserializer(_options.ValueDeserializer);
}
if (_options.LogHandler != null)
{
builder.SetLogHandler(_options.LogHandler);
}
if (_options.OffsetsCommittedHandler != null)
{
builder.SetOffsetsCommittedHandler(_options.OffsetsCommittedHandler);
}
if (_options.PartitionAssignmentHandler != null)
{
builder.SetPartitionsAssignedHandler(_options.PartitionAssignmentHandler);
}
if (_options.PartitionsRevokedHandler != null)
{
builder.SetPartitionsRevokedHandler(_options.PartitionsRevokedHandler);
}
if (_options.StatisticsHandler != null)
{
builder.SetStatisticsHandler(_options.StatisticsHandler);
}
}
public IConsumer <TKey, TValue> Build()
{
Confluent.Kafka.IConsumer <TKey, TValue> consumer = null;
try
{
if (_brokerList.Count == 0)
{
throw new InvalidOperationException($"One broker must be added to build a consumer. Use the {nameof(AddBroker)} method to add a broker!");
}
_configuration["bootstrap.servers"] = String.Join(", ", _brokerList.ToArray());
var builder = new Confluent.Kafka.ConsumerBuilder <TKey, TValue>(_configuration.Select(kp => new KeyValuePair <string, string>(kp.Key, kp.Value.ToString())).AsEnumerable());
SetHandlers(builder);
consumer = builder.Build();
return(consumer);
}
finally
{
if (_subscribeOnBuild)
{
consumer.Subscribe(_topics);
}
}
}
