public static KafkaConsumerConfigurationBuilder UseKafka(this StandardConfigurer <IConsumerImplementation> configurer, IEnumerable <string> bootstrapServers)
{
var builder = new KafkaConsumerConfigurationBuilder();
StandardConfigurer.Open(configurer)
.Register(c =>
{
var loggerFactory = c.Get <ILoggerFactory>();
var topics = c.Has <Topics>() ? c.Get <Topics>() : new Topics();
var group = c.Get <GroupId>();
var consumerDispatcher = c.Get <IConsumerDispatcher>();
var positionManager = c.Get <IPositionManager>(errorMessage: @"The Kafka consumer needs access to a positions manager, so it can figure out which offsets to pick up from when starting up.");
var consumerContext = c.Get <ConsumerContext>();
var partitionsAssignedHandler = builder.GetPartitionsAssignedHandler();
var partitionsRevokedHandler = builder.GetPartitionsRevokedHandler();
var startPosition = c.Has <PositionsStorageConfigurationExtensions.ExplicitlySetInitialPosition>() ? c.Get <PositionsStorageConfigurationExtensions.ExplicitlySetInitialPosition>().Position : StartFromPosition.Beginning;
return(new KafkaConsumerImplementation(
loggerFactory: loggerFactory,
address: string.Join("; ", bootstrapServers),
topics: topics,
group: group.Id,
consumerDispatcher: consumerDispatcher,
positionManager: positionManager,
context: consumerContext,
configurationCustomizer: config => builder.Apply(config),
partitionsAssignedHandler: partitionsAssignedHandler,
partitionsRevokedHandler: partitionsRevokedHandler,
startPosition: startPosition
));
});
return(builder);
}
public static KafkaConsumerConfigurationBuilder WithCertificate(this KafkaConsumerConfigurationBuilder builder, string sslCaLocation)
{
KafkaConsumerConfigurationBuilder.AddCustomizer(builder, config =>
{
config.SecurityProtocol = SecurityProtocol.Ssl;
config.SslCaLocation = sslCaLocation;
return(config);
});
return(builder);
}
/// <summary>
/// Configures the Kafka client with good defaults for connecting to Confluent Cloud
/// </summary>
public static KafkaConsumerConfigurationBuilder WithConfluentCloud(this KafkaConsumerConfigurationBuilder builder, string key, string secret)
{
KafkaConsumerConfigurationBuilder.AddCustomizer(builder, config =>
{
config.SaslUsername = key;
config.SaslPassword = secret;
config.SessionTimeoutMs = 45000;
config.SecurityProtocol = SecurityProtocol.SaslSsl;
config.SaslMechanism = SaslMechanism.Plain;
config.EnableSslCertificateVerification = false;
config.SocketKeepaliveEnable = true;
config.LogConnectionClose = false;
config.ReconnectBackoffMaxMs = 3333;
return(config);
});
return(builder);
}
/// <summary> /// Adds a <see cref="ConsumerConfig"/> customizer to the builder. This provides the ability to customize and/or completely replace the configuration /// used to build the consumer /// </summary> public static void AddCustomizer(KafkaConsumerConfigurationBuilder builder, Func <ConsumerConfig, ConsumerConfig> customizer) => builder._customizers.Add(customizer);
