Spring Cloud dataflow: Register new custom kryo serializer

Question

I am creating a system using cloud-dataflow, I have a source and a transformer. We like to use kryo, but some of our classes require custom kryo serializers, I have written serializers before. We are now using spring-integration-core-4.3.11, and since 4.2 the model has changes(per the docs) to use Codecs instead of MessageConverter interface.

The question is, how can I register the kryo serializers in the new Codec framework, do I make a new Codec implementation inheriting from MessageCodec? Do I create a new Registrar implementation?

Just making the implementation a bean would it be discovered? I found Codec being Autowired, but nowhere found them being produced....

thanks in advance!

Answer 1

See KryoCodecAutoConfiguration .

You can either replace the standard PojoCodec with your own bean, or simply add your registrar (and any others needed) and SCSt will wire them into the default PojoCodec ....

@Bean
@ConditionalOnMissingBean(PojoCodec.class)
public PojoCodec codec() {
    Map<String, KryoRegistrar> kryoRegistrarMap = applicationContext.getBeansOfType(KryoRegistrar.class);
    return new PojoCodec(new ArrayList<>(kryoRegistrarMap.values()), kryoCodecProperties.isReferences());
}

@Bean
@ConditionalOnMissingBean(KryoRegistrar.class)
public KryoRegistrar fileRegistrar() {
    return new FileKryoRegistrar();
}