Spring RestTemplate Behavior when handling responses with a status of NO_CONTENT

Question

Okay, I have a class NamedSystems, that has as its only field a Set of NamedSystem.

I have a method to find NamedSystems by certain criteria. That\'s not really imp

Answer 1

I believe you should probably look at the ResponseExtractor interface & call execute on the RestTemplate providing your implementation of the extractor. To me it looks like a common requirement to do this so have logged this:

https://jira.springsource.org/browse/SPR-8016

Here's one I prepared earlier:

private class MyResponseExtractor extends HttpMessageConverterExtractor {

    public MyResponseExtractor (Class responseType,
      List> messageConverters) {
        super(responseType, messageConverters);
    }

    @Override
    public MyEntity extractData(ClientHttpResponse response) throws IOException {

        MyEntity result;

        if (response.getStatusCode() == HttpStatus.OK) {
            result = super.extractData(response);
        } else {
            result = null;
        }

        return result;
    }
}

I've tested this & it seems to do what I want.

To create the instance of the ResponseExtractor I call the constructor & pass the converters from a RestTemplate instance that's been injected;

E.g.

ResponseExtractor responseExtractor =
    new MyResponseExtractor(MyEntity.class, restTemplate.getMessageConverters());

Then the call is:

MyEntity responseAsEntity =
    restTemplate.execute(urlToCall, HttpMethod.GET, null, responseExtractor);

Your mileage may vary. ;-)