public IMessageSubscription Subscribe(string subscriberId, ISet <string> channels, MessageHandler handler)
{
var logContext = $"{nameof(Subscribe)} for subscriberId='{subscriberId}', " +
$"channels='{String.Join(",", channels)}', " +
$"handler='{handler.Method.Name}'";
_logger.LogDebug($"+{logContext}");
Action <SubscriberIdAndMessage, IServiceProvider> decoratedHandler = _decoratedMessageHandlerFactory.Decorate(handler);
var swimLaneBasedDispatcher = new SwimlaneBasedDispatcher(subscriberId, _loggerFactory);
EventuateKafkaConsumerMessageHandler kcHandler =
(record, completionCallback) => swimLaneBasedDispatcher.Dispatch(ToMessage(record), record.Partition,
message => Handle(message, completionCallback, subscriberId, decoratedHandler));
var kc = new EventuateKafkaConsumer(subscriberId,
kcHandler,
new List <string>(channels),
_bootstrapServers,
_eventuateKafkaConsumerConfigurationProperties,
_loggerFactory);
_consumers.Add(kc);
kc.Start();
_logger.LogDebug($"-{logContext}");
return(new MessageSubscription(() =>
{
kc.Dispose();
_consumers.Remove(kc);
}));
}
public KafkaMessageProcessor(string subscriberId,
EventuateKafkaConsumerMessageHandler handler,
ILogger <KafkaMessageProcessor> logger)
{
_handler = handler;
_logger = logger;
_loggingObjectContext = $"SubscriberId='{subscriberId}', handler='{handler.Method.Name}'";
_offsetTracker = new OffsetTracker(_logger);
}
public EventuateKafkaConsumer(string subscriberId,
EventuateKafkaConsumerMessageHandler handler,
IList <string> topics,
string bootstrapServers,
EventuateKafkaConsumerConfigurationProperties eventuateKafkaConsumerConfigurationProperties,
ILoggerFactory loggerFactory)
{
_subscriberId = subscriberId;
_handler = handler;
_topics = topics;
_loggerFactory = loggerFactory;
_logger = loggerFactory.CreateLogger <EventuateKafkaConsumer>();
_consumerProperties =
ConsumerPropertiesFactory.MakeDefaultConsumerProperties(bootstrapServers, subscriberId)
.ToDictionary(p => p.Key, p => p.Value);
foreach (KeyValuePair <string, string> pair in eventuateKafkaConsumerConfigurationProperties.Properties)
{
_consumerProperties[pair.Key] = pair.Value;
}
}