Package org.springframework.kafka.annotation

Class KafkaNullAwarePayloadArgumentResolver

java.lang.Object

org.springframework.messaging.handler.annotation.support.PayloadMethodArgumentResolver

org.springframework.kafka.annotation.KafkaNullAwarePayloadArgumentResolver

All Implemented Interfaces:

HandlerMethodArgumentResolver

public class KafkaNullAwarePayloadArgumentResolver
extends PayloadMethodArgumentResolver

PayloadMethodArgumentResolver that can properly decode KafkaNull payloads, returning null. When using a custom MessageHandlerMethodFactory, add this resolver if you need to handle tombstone records with null values.

Since:

2.7.4

Author:

Gary Russell, Wang Zhiyang

Method Summary

Modifier and Type	Method	Description
protected boolean	isEmptyPayload(Object payload)
Object	resolveArgument(MethodParameter parameter, Message<?> message)

Methods inherited from class org.springframework.messaging.handler.annotation.support.PayloadMethodArgumentResolver

resolveTargetClass, supportsParameter, validate

Methods inherited from class java.lang.Object

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

Method Details

resolveArgument

public Object resolveArgument(MethodParameter parameter,
 Message<?> message)
                       throws Exception

Specified by:

resolveArgument in interface HandlerMethodArgumentResolver

Overrides:

resolveArgument in class PayloadMethodArgumentResolver

Throws:

Exception

isEmptyPayload

protected boolean isEmptyPayload(@Nullable
 Object payload)

Overrides:

isEmptyPayload in class PayloadMethodArgumentResolver