/// <summary>
/// Constructs a new instance of default API consumer.
/// </summary>
/// <param name="api">
/// The ingress API which messages this consumer process.
/// </param>
/// <param name="consumer">
/// The Kafka API consumer.
/// </param>
/// <param name="logger">
/// The logger.
/// </param>
/// <exception cref="ArgumentNullException">
/// One of arguments is not specified.
/// </exception>
public DefaultApiConsumer(
[NotNull] IIngressApi api,
[NotNull] IConsumer <TKey, TValue> consumer,
[NotNull] ILogger <DefaultApiConsumer <TKey, TValue> > logger)
{
_api = api ?? throw new ArgumentNullException(nameof(api));
_consumer = consumer ?? throw new ArgumentNullException(nameof(consumer));
_logger = logger ?? throw new ArgumentNullException(nameof(logger));
}
/// <inheritdoc />
public IApiConsumer <TKey, TValue> Get <TKey, TValue>([NotNull] IIngressApi api)
{
if (api == null)
{
throw new ArgumentNullException(nameof(api));
}
if (!_consumers.TryGetValue(api, out var consumer))
{
throw new ArgumentException($"There is no registered consumer for API with ID '{api.Id}'.", nameof(api));
}
return((IApiConsumer <TKey, TValue>)consumer);
}
/// <inheritdoc />
public void Add <TKey, TValue>([NotNull] IIngressApi api, [NotNull] IApiConsumer <TKey, TValue> consumer)
{
if (api == null)
{
throw new ArgumentNullException(nameof(api));
}
if (consumer == null)
{
throw new ArgumentNullException(nameof(consumer));
}
if (!_consumers.TryAdd(api, consumer))
{
throw new PoezdConfigurationException($"An ingress API with ID '{api.Id}' and its consumer already registered.");
}
}
private void StartConsumeFromApiTopics <TKey, TValue>(IIngressApi api, CancellationToken cancellationToken) => _consumerRegistry.Get <TKey, TValue>(api).Start(OnMessageReceived, cancellationToken);
private void CreateAndRegisterConsumer <TKey, TValue>(IIngressApi api) => _consumerRegistry.Add(api, _apiConsumerFactory.Create <TKey, TValue>(_driverConfiguration.ConsumerConfig, api));
public IApiConsumer <TKey, TValue> Create <TKey, TValue>(ConsumerConfig config, IIngressApi api) => null;
private static Pipeline <MessageHandlingContext> BuildIngressPipeline(IMessageBroker messageBroker, IIngressApi api)
{
try
{
var pipeline = new Pipeline <MessageHandlingContext>();
messageBroker.Ingress.EnterPipeFitter.AppendStepsInto(pipeline);
api.PipeFitter.AppendStepsInto(pipeline);
messageBroker.Ingress.ExitPipeFitter.AppendStepsInto(pipeline);
return(pipeline);
}
catch (Exception exception)
{
throw new PoezdOperationException(
"An error occurred during building an ingress pipeline. Inspect the inner exceptions for more details.",
exception);
}
}
/// <inheritdoc />
public IApiConsumer <TKey, TValue> Create <TKey, TValue>(ConsumerConfig config, IIngressApi api)
{
var consumer = _consumerFactory.Create <TKey, TValue>(
config ?? throw new ArgumentNullException(nameof(config)),
_consumerConfigurator,
_deserializerFactory);
return(new DefaultApiConsumer <TKey, TValue>(
api ?? throw new ArgumentNullException(nameof(api)),
consumer,
_loggerFactory.CreateLogger <DefaultApiConsumer <TKey, TValue> >()));
}