/// <summary>
/// Constructor. Initializes the <see cref="_consumer"/> instance.
/// </summary>
/// <param name="consumerFactory">
/// A <see cref="IKafkaConsumerFactory{TKey,TValue}"/> using <see cref="SubmitKey"/> keys and <see cref="string"/> values</param>
/// <param name="diffGenerator">A <see cref="IDiffGenerator"/>. Used to generate diffs from left and right values.</param>
/// <param name="diffRepository">A <see cref="IDiffRepository"/>. Used to persist <see cref="DiffRecord"/>s.</param>
/// <param name="keyDeserializer">A <see cref="IDeserializer{T}"/>, used to deserialize <see cref="SubmitKey"/>s.</param>
/// <param name="valueDeserializer">A <see cref="IDeserializer{T}"/>, used to deserialize <see cref="string"/> values.</param>
/// <param name="logger">A <see cref="ILogger{T}"/> for this class.</param>
/// <param name="bootstrapServer">Kafka server. Overrides default 'localhost:9092' value.</param>
public TopicListener(
IKafkaConsumerFactory <SubmitKey, string> consumerFactory,
IDiffGenerator diffGenerator,
IDiffRepository diffRepository,
IDeserializer <SubmitKey> keyDeserializer,
IDeserializer <string> valueDeserializer,
ILogger <TopicListener> logger,
string bootstrapServer)
{
_diffGenerator = diffGenerator;
_diffRepository = diffRepository;
_logger = logger;
// TODO: not sure it must be a ConcurrentDictionary here, but keeping it just in case
var config = new ConcurrentDictionary <string, object>(Config);
if (!string.IsNullOrWhiteSpace(bootstrapServer))
{
config["bootstrap.servers"] = bootstrapServer;
}
_logger.Info($"config[bootstrap.servers] = {config["bootstrap.servers"]}.");
_consumer = consumerFactory.Create(config, keyDeserializer, valueDeserializer);
_consumer.Assign(new List <TopicPartitionOffset> {
new TopicPartitionOffset(Topic, 0, 0)
});
}
public EventBusKafka(IEventBusSubscriptionsManager subscriptionsManager, IKafkaConsumerFactory consumerFactory, ILifetimeScope autofac, IKafkaConsumerConfiguration configuration, IDeserializer <string> valueDeserializer)
{
this.subscriptionsManager = subscriptionsManager ?? new InMemoryEventBusSubscriptionsManager();
this.consumerFactory = consumerFactory;
this.autofac = autofac;
this.configuration = configuration;
this.valueDeserializer = valueDeserializer;
this.subscribedTopics = configuration.SubscribedTopics;
Configuration = configuration.Configuration;
valueDeserializer.Configure(new List <KeyValuePair <string, object> > {
new KeyValuePair <string, object>("dotnet.string.serializer.encoding.key", configuration.Encoding.HeaderName)
}, true);
CreateOneConsumerPerTopic();
}
