Package com.bakdata.kafka

Class AvroDeadLetterConverter

  • All Implemented Interfaces:
    com.bakdata.kafka.DeadLetterConverter<DeadLetter>
    public final class AvroDeadLetterConverter
extends java.lang.Object
implements com.bakdata.kafka.DeadLetterConverter<DeadLetter>
    Convert a DeadLetterDescription to an Avro DeadLetter

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static <V> org.apache.kafka.streams.kstream.ValueTransformerSupplier<com.bakdata.kafka.ProcessingError<V>,​DeadLetter> asTransformer​(java.lang.String description)
      Creates a transformer that uses the AvroDeadLetterConverter
      DeadLetter convert​(com.bakdata.kafka.DeadLetterDescription deadLetterDescription)  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • AvroDeadLetterConverter

        public AvroDeadLetterConverter()

    • Method Detail

      • convert

        public DeadLetter convert​(com.bakdata.kafka.DeadLetterDescription deadLetterDescription)
        Specified by:
        convert in interface com.bakdata.kafka.DeadLetterConverter<DeadLetter>

      • asTransformer

        public static <V> org.apache.kafka.streams.kstream.ValueTransformerSupplier<com.bakdata.kafka.ProcessingError<V>,​DeadLetter> asTransformer​(java.lang.String description)
        Creates a transformer that uses the AvroDeadLetterConverter 
        
 // Example, this works for all error capturing topologies
 final KeyValueMapper<K, V, KeyValue<KR, VR>> mapper = ...;
 final KStream<K, V> input = ...;
 final KStream<KR, ProcessedKeyValue<K, V, VR>> processed = input.map(captureErrors(mapper));
 final KStream<KR, VR> output = processed.flatMapValues(ProcessedKeyValue::getValues);
 final KStream<K, ProcessingError<V>> errors = processed.flatMap(ProcessedKeyValue::getErrors);
 final KStream<K, DeadLetter> deadLetters = errors.transformValues(
                      AvroDeadLetterConverter.asTransformer("Description"));
 deadLetters.to(ERROR_TOPIC);
        Type Parameters:
        V - type of the input value
        Parameters:
        description - shared description for all errors
        Returns:
        a transformer supplier