Should the documentation have an example for how to use multiple decoders?

[sshevlyagin]

In my implementation I need to use the default decoder for byte[] and GsonDecoder to map to objects and I'm doing the following in Java 11:

@Bean
    public Decoder decoder() {
        Decoder decoder = (response, type) -> {
            if (type.getTypeName().equals("java.lang.String") ||
                    type.getTypeName().equals("byte[]")
            ) {
                return new Decoder.Default().decode(response, type);
            } else {
                return new GsonDecoder().decode(response, type);
            }
        };
        return new ResponseEntityDecoder(decoder);
    }

Is this worth having an example in the documentation? I was inspired by this discussion spring-cloud/spring-cloud-netflix#2246

[kdavisk6]

@sshevlyagin

The example you provided is something that I think is a little too specific for our general documentation. We may want to consider it part of our Wiki instead. Thoughts?

[Klapsa2503]

I agree, this should be a part of Wiki, code snippet was very useful for me

[sshevlyagin]

@kdavisk6 - happy to make it a wiki article. Can I have permission to edit or would you like to do it? I tried pushing up the attached file but I don't have the rights. wiki gist

[velo]

@sshevlyagin lemme check how to do that, one sec

[velo]

@sshevlyagin seems it's a all or nothing situation regarding to the wiki... either is public to anyone to edit or not...

@kdavisk6 what do you think about giving @sshevlyagin write access?

[velo]

@sshevlyagin what if we added a new #decoder(MediaType,Decoder) to Feign.Builder

Invoking decoder(Decoder) would overwrite the decoder as is today.
Invoking decoder(MediaType,Decoder) would replace decoder with a TypedDecoder, and would assign the existing decoder to media-type */*
Subsequent invocations of decoder(MediaType,Decoder) would append a new Decoder to the TypedDecoder.
If MediaType already registered on TypedDecoder log warning and replace.

TypedDecoder would be a implementation of Decoder that checks the MediaType first and then delegate the decoding process to Decoder

[sshevlyagin]

That sounds way better @velo. My scenario was the API returns image/jpeg or application/json depending on which endpoint you hit.

re: wiki, no need to give me write access you can just copy/paste that gist if you want