Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

WebClientConfigurer overrides exchange strategies

See original GitHub issue

Not sure if feature or bug 😉 (Hateoas version 1.0.0.M1)

public class WebClientConfigurer {

    private final ObjectMapper mapper;
    private final Collection<HypermediaMappingInformation> hypermediaTypes;

    /**
     * Return a set of {@link ExchangeStrategies} driven by registered {@link HypermediaType}s.
     *
     * @return a collection of {@link Encoder}s and {@link Decoder} assembled into a {@link ExchangeStrategies}.
     */
    public ExchangeStrategies hypermediaExchangeStrategies() {

        List<Encoder<?>> encoders = new ArrayList<>();
        List<Decoder<?>> decoders = new ArrayList<>();

        this.hypermediaTypes.forEach(hypermedia -> {

            ObjectMapper objectMapper = hypermedia.configureObjectMapper(this.mapper.copy());
            MimeType[] mimeTypes = hypermedia.getMediaTypes().toArray(new MimeType[0]);

            encoders.add(new Jackson2JsonEncoder(objectMapper, mimeTypes));
            decoders.add(new Jackson2JsonDecoder(objectMapper, mimeTypes));
        });

        encoders.add(CharSequenceEncoder.allMimeTypes());
        decoders.add(StringDecoder.allMimeTypes());

        return ExchangeStrategies.builder().codecs(clientCodecConfigurer -> {

            encoders.forEach(encoder -> clientCodecConfigurer.customCodecs().encoder(encoder));
            decoders.forEach(decoder -> clientCodecConfigurer.customCodecs().decoder(decoder));

            clientCodecConfigurer.registerDefaults(false);
        }).build();
    }

    /**
     * Register the proper {@link ExchangeStrategies} for a given {@link WebClient}.
     *
     * @param webClient
     * @return mutated webClient with hypermedia support.
     */
    public WebClient registerHypermediaTypes(WebClient webClient) {
        return webClient.mutate().exchangeStrategies(hypermediaExchangeStrategies()).build();
    }
}

this

  public WebClient registerHypermediaTypes(WebClient webClient) {
        return webClient.mutate().exchangeStrategies(hypermediaExchangeStrategies()).build();
    }

overrides the existing exchangeStrategies, which results in

org.springframework.web.reactive.function.UnsupportedMediaTypeException: Content type 'text/plain;charset=UTF-8' not supported for bodyType=org.springframework.core.io.buffer.DataBuffer

when working with Sleuth.