支持为 spring 云中的每个消费者绑定定义 spring.json.key.type

Question

After following the JsonSerdeExample I was able to directly consume the data from topics into my Java Objects. The following properties did all the magic

 spring.json.key.default.type: com.xxxx.datamapper.domain.FormUUID
 spring.json.value.default.type: com.xxxx.datamapper.domain.FormData

However, now I want to run two stream listeners in a single spring boot application. To do so I need a similar configuration for each consumer binding. Does spring cloud support this?

As of now for the second stream, I have to consume using String serializer and then do the mapping using Object mapper. This makes the application code convoluted with unnecessary transformation.

Answer 1

That sample defines the Serdes at the binder level, you can also set them at the binding level

spring.cloud.stream.kafka.streams.bindings.foo.consumer.key-serde=
spring.cloud.stream.kafka.streams.bindings.foo.consumer.value-serde=

To override the setting at the binder level.

Similarly, you can set properties for the Serdes the same way.

spring.cloud.stream.kafka.streams.bindings.foo.consumer.configuration.spring.json...

You can define the Serde at the binder level and properties at the binding level too.