How do I remove the "nativeHeaders" warning with Spring Integration AWS SNS?

Question

In an out-of-the-box configuration of the Spring Integration AWS SnsMessageHandler outgoing channel adapter, a Spring Message header named nativeHeaders of type LinkedMultiValueMap is populated somewhere along the chain. During the conversion process to an SNS message, the handler delegates to the SqsHeaderMapper, which issues a log at WARN level for every message that the automatically-populated nativeHeaders can't be converted to an AWS-compatible format.

I don't want to suppress logs from the SqsHeaderMapper in case there's a real bug (like I forget to stringify some POJO header value), but I don't see either a flag to prevent creation of the nativeHeaders header or a way to configure the SqsHeaderMapper instance that's privately owned by the SnsMessageHandler. Is there a clean way to remove this warning?

Answer 1

The nativeHeaders is populated by the NativeMessageHeaderAccessor. I believe this is the part of SNS consumer and its handler. Or SQS. Then it looks like you propagate the message downstream to SNS. And you probably you really mean a SnsHeaderMapper in the SnsMessageHandler.

I don't think it is really a header mapper responsibility to prevent such a warn for specific headers. It cannot know what is intentional and what is not. Likely now you have a warn, so you are good to use a HeaderFilter before SnsMessageHandler to remove those headers which cannot be mapped to SNS attributes.

And sure! You can inject a custom SnsHeaderMapper with any desired logic overridden.