/// <summary>
/// Adds a Serilog sink that writes <see cref="Serilog.Events.LogEvent" /> to Apache Kafka using
/// a custom <see cref="ITextFormatter" />.
/// </summary>
/// <param name="sinkConfiguration">Logger sink configuration.</param>
/// <param name="formatter">A formatter to convert the log events into text for the kafka.</param>
/// <param name="kafka">Options to configure communication with kafka.</param>
/// <param name="batch">Options to configure sink write log events in batches.</param>
/// <returns>Configuration object allowing method chaining.</returns>
public static LoggerConfiguration Kafka(this LoggerSinkConfiguration sinkConfiguration,
ITextFormatter formatter, KafkaOptions kafka, BatchOptions batch)
{
if (sinkConfiguration == null)
{
throw new ArgumentNullException(nameof(sinkConfiguration));
}
if (formatter == null)
{
throw new ArgumentNullException(nameof(formatter));
}
if (kafka == null)
{
throw new ArgumentNullException(nameof(kafka));
}
if (batch == null)
{
throw new ArgumentNullException(nameof(batch));
}
var kafkaSink = KafkaSink.Create(formatter, kafka, batch);
return(sinkConfiguration.Sink(kafkaSink));
}
/// <summary>
/// Adds a sink that writes log events to a Kafka topic in the broker endpoints.
/// </summary>
/// <param name="loggerConfiguration">The logger configuration.</param>
/// <param name="batchSizeLimit">The maximum number of events to include in a single batch.</param>
/// <param name="period">The time in seconds to wait between checking for event batches.</param>
/// <param name="bootstrapServers">The list of bootstrapServers separated by comma.</param>
/// <param name="topic">The topic name.</param>
/// <returns></returns>
public static LoggerConfiguration Kafka(
this LoggerSinkConfiguration loggerConfiguration,
string bootstrapServers = "localhost:9092",
int batchSizeLimit = 50,
int period = 5,
SecurityProtocol securityProtocol = SecurityProtocol.Plaintext,
SaslMechanism saslMechanism = SaslMechanism.Plain,
string topic = "logs",
string saslUsername = null,
string saslPassword = null,
string sslCaLocation = null)
{
var sink = new KafkaSink(
bootstrapServers,
batchSizeLimit,
period,
securityProtocol,
saslMechanism,
topic,
saslUsername,
saslPassword,
sslCaLocation);
return(loggerConfiguration.Sink(sink));
}
public static LoggerConfiguration Kafka(
this LoggerSinkConfiguration loggerConfiguration,
Func <LogEvent, string> topicDecider,
string bootstrapServers = "localhost:9092",
int batchSizeLimit = 50,
int period = 5,
SecurityProtocol securityProtocol = SecurityProtocol.Plaintext,
SaslMechanism saslMechanism = SaslMechanism.Plain,
string saslUsername = null,
string saslPassword = null,
string sslCaLocation = null,
ITextFormatter formatter = null,
LogEventLevel restrictedToMinLevel = LogEventLevel.Verbose,
LoggingLevelSwitch levelSwitch = null)
{
var sink = new KafkaSink(
bootstrapServers,
batchSizeLimit,
period,
securityProtocol,
saslMechanism,
topicDecider,
saslUsername,
saslPassword,
sslCaLocation,
formatter);
return(loggerConfiguration.Sink(sink, restrictedToMinLevel, levelSwitch));
}
public static LoggerConfiguration Kafka(
this LoggerSinkConfiguration loggerConfiguration,
KafkaSinkOptions options)
{
Contract.Requires(loggerConfiguration != null);
Contract.Requires(options != null);
Contract.Ensures(Contract.Result<LoggerConfiguration>() != null);
var kafkaClient = new KafkaClient(options);
var kafkaSink = new KafkaSink(kafkaClient, options);
var result = loggerConfiguration.Sink(kafkaSink);
Contract.Assume(result != null);
return result;
}
/// <summary>
/// Adds a Serilog sink that writes <see cref="Serilog.Events.LogEvent" /> to Apache Kafka using
/// a custom <see cref="ITextFormatter" />. In case of kafka unavailability,
/// <see cref="Serilog.Events.LogEvent" /> will be written to <paramref name="fallback" /> sink.
/// </summary>
/// <param name="sinkConfiguration">Logger sink configuration.</param>
/// <param name="formatter">A formatter to convert the log events into text for the kafka.</param>
/// <param name="kafka">Options to configure communication with kafka.</param>
/// <param name="batch">Options to configure sink write log events in batches.</param>
/// <param name="fallbackTime">Time to wait between checking of kafka availability.</param>
/// <param name="fallback">Fallback sink to write the log events when kafka is unavailable.</param>
/// <returns>Configuration object allowing method chaining.</returns>
public static LoggerConfiguration Kafka(this LoggerSinkConfiguration sinkConfiguration,
ITextFormatter formatter, KafkaOptions kafka, BatchOptions batch, ILogEventSink fallback,
TimeSpan fallbackTime)
{
if (sinkConfiguration == null)
{
throw new ArgumentNullException(nameof(sinkConfiguration));
}
if (formatter == null)
{
throw new ArgumentNullException(nameof(formatter));
}
if (kafka == null)
{
throw new ArgumentNullException(nameof(kafka));
}
if (batch == null)
{
throw new ArgumentNullException(nameof(batch));
}
if (fallback == null)
{
throw new ArgumentNullException(nameof(fallback));
}
if (fallbackTime <= TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException(nameof(fallbackTime), "The fallback time must be positive");
}
var kafkaSink = KafkaSink.Create(formatter, kafka, batch);
return(sinkConfiguration.Sink(KafkaFailoverSink.Create(kafkaSink, fallback, batch, fallbackTime)));
}
private static LoggerConfiguration Kafka(
this LoggerSinkConfiguration loggerConfiguration,
string bootstrapServers,
int batchSizeLimit,
int period,
SecurityProtocol securityProtocol,
SaslMechanism saslMechanism,
string saslUsername,
string saslPassword,
string sslCaLocation,
string topic,
Func <LogEvent, string> topicDecider,
ITextFormatter formatter)
{
var kafkaSink = new KafkaSink(
bootstrapServers,
securityProtocol,
saslMechanism,
saslUsername,
saslPassword,
sslCaLocation,
topic,
topicDecider,
formatter);
var batchingOptions = new PeriodicBatchingSinkOptions
{
BatchSizeLimit = batchSizeLimit,
Period = TimeSpan.FromSeconds(period)
};
var batchingSink = new PeriodicBatchingSink(
kafkaSink,
batchingOptions);
return(loggerConfiguration
.Sink(batchingSink));
}
