public EventConsumer(IEventDeserializer eventDeserializer, EventConsumerConfig config, ILogger <EventConsumer <TA, TKey> > logger)
{
_eventDeserializer = eventDeserializer;
_logger = logger;
var aggregateType = typeof(TA);
var consumerConfig = new ConsumerConfig
{
GroupId = config.ConsumerGroup,
BootstrapServers = config.KafkaConnectionString,
AutoOffsetReset = AutoOffsetReset.Earliest,
EnablePartitionEof = true
};
var consumerBuilder = new ConsumerBuilder <TKey, string>(consumerConfig);
var keyDeserializerFactory = new KeyDeserializerFactory();
consumerBuilder.SetKeyDeserializer(keyDeserializerFactory.Create <TKey>());
_consumer = consumerBuilder.Build();
var topicName = $"{config.TopicBaseName}-{aggregateType.Name}";
_consumer.Subscribe(topicName);
}
public static IServiceCollection AddKafka(this IServiceCollection services, EventConsumerConfig consumerConfig)
{
return(services.AddSingleton(consumerConfig)
.AddSingleton(typeof(IEventConsumer <,>), typeof(EventConsumer <,>))
.AddKafkaEventProducer <Customer, Guid>(consumerConfig)
.AddKafkaEventProducer <Account, Guid>(consumerConfig));
}
private static IServiceCollection AddKafkaEventProducer <TA, TK>(this IServiceCollection services, EventConsumerConfig configuration)
where TA : class, IAggregateRoot <TK>
{
return(services.AddSingleton <IEventProducer <TA, TK> >(ctx =>
{
var logger = ctx.GetRequiredService <ILogger <EventProducer <TA, TK> > >();
return new EventProducer <TA, TK>(configuration.TopicBaseName, configuration.KafkaConnectionString, logger);
}));
}
