How to write generic deserializer with Spring Cloud Stream?(Batch-Consumer) - deserialization

Question

I was communicating between my cloud services. I was sending person from one service and receiving from another service and it was working without any serializer or deserializer.
My code is like that:
#EnableBinding({ PersonStream.class })
public class StreamConfiguration {
}
public interface PersonStream {
String OUTPUT = "person-topic-out";
String INPUT = "person-topic-in";
#Input(INPUT)
SubscribableChannel inboundPerson();
#Output(OUTPUT)
MessageChannel outboundPerson();
}
#Service
public class PersonProducer {
#Autowired
private PersonStream personStream;
#Scheduled(fixedRate = 2000, initialDelay = 10000)
public void publishPerson() {
MessageChannel messageChannel = personStream.outboundPerson();
Person person = new Person("Omer", "Celik");
messageChannel.send(
MessageBuilder.withPayload(person)
.build());
}
}
#Service
public class PersonListener {
#StreamListener(value = PersonStream.INPUT)
private void personBulkReceiver(Person person) {
System.out.println(person.getName());
}
}
spring:
cloud:
stream:
kafka:
binders:
defaultKafka:
type: kafka
environment:
spring:
cloud:
stream:
kafka:
binder:
brokers: localhost:9092
bindings:
person-topic-in:
binder: defaultKafka
destination: person-topic
contentType: application/person
group : omercelik
person-topic-out:
binder: defaultKafka
destination: person-topic
contentType: application/json
After than I needed to consume data as batch. But when I consume as batch, data types will be List. I solved that problem by writing deserializer and data types will be List. However, that way I have to write deserializer for every data. Is there a generic deserializer? How can I write generic deserializer?
I do not use avro schema. Waiting for your suggestions...
#Service
public class PersonListener {
#StreamListener(value = PersonStream.INPUT)
private void personBulkReceiver(List<Person> person) {
System.out.println(person.get(0).getName());
System.out.println("personBulkReceiver : " + person.size());
}
}
public class PersonDeserializer implements Deserializer<Person> {
#Override
public Person deserialize(String s, byte[] bytes) {
ObjectMapper objectMapper = new ObjectMapper();
try {
Person p = objectMapper.readValue(bytes, Person.class);
return p;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
spring:
cloud:
stream:
kafka:
binders:
defaultKafka:
type: kafka
environment:
spring:
cloud:
stream:
kafka:
binder:
brokers: localhost:9092
bulkKafka:
type: kafka
environment:
spring:
cloud:
stream:
kafka:
binder:
brokers: localhost:9092
configuration:
max.poll.records: 1500
fetch.min.bytes: 1000000
fetch.max.wait.ms: 10000
value.deserializer: tr.cloud.stream.examples.PersonDeserializer
bindings:
person-topic-in:
binder: bulkKafka
destination: person-topic
contentType: application/person
group : omercelik
consumer:
batch-mode: true
person-topic-out:
binder: defaultKafka
destination: person-topic
contentType: application/json
Codes : https://github.com/omercelikceng/spring-cloud-stream-batch-consumer