KafkaStreams serde exception

Question

i am playing with Kafka and streams technology; i have created a custom serializer and deserializer for the KStream that i will use to receive messages from a given topic.

Answer 1

Another way is using StreamsBuilder instead of KStreamBuilder. KStreamBuilder is deprecated in 1.0.0. You can directly pass serde object using Consumed.with while creating stream. You need not to create custom Serde class in this scenario.

Serde messageSerde = Serdes.serdeFrom(serializer, deserializer);

StreamsBuilder builder = new StreamsBuilder();
KStream eventsStream = builder.stream(topic, Consumed.with(Serdes.String(), messageSerde));

You can keep StringSerde in below code instead of using messageSerde.getClass() which is failing because messageSerde is just a WrappedSerde that does not have non-argument constructor.

streamsConfiguration.put(StreamsConfig.VALUE_SERDE_CLASS_CONFIG, StringSerde.class.getName());