Spring RestTemplate - Overriding ResponseErrorHandler

Question

I am calling a ReST service through RestTemplate and trying to override ResponseErrorHandler in Spring 3.2 to handle cust

Answer 1

Following link has useful information about Exception Flow for Spring ResponseErrorHandler .

Adding code here, just in-case the blog is down:

Code for ErrorHandler:

public class MyResponseErrorHandler implements ResponseErrorHandler {

    private static final Log logger = LogFactory.getLog(MyResponseErrorHandler.class);

    @Override
    public void handleError(ClientHttpResponse clienthttpresponse) throws IOException {

        if (clienthttpresponse.getStatusCode() == HttpStatus.FORBIDDEN) {
            logger.debug(HttpStatus.FORBIDDEN + " response. Throwing authentication exception");
            throw new AuthenticationException();
        }
    }

    @Override
    public boolean hasError(ClientHttpResponse clienthttpresponse) throws IOException {

        if (clienthttpresponse.getStatusCode() != HttpStatus.OK) {
            logger.debug("Status code: " + clienthttpresponse.getStatusCode());
            logger.debug("Response" + clienthttpresponse.getStatusText());
            logger.debug(clienthttpresponse.getBody());

            if (clienthttpresponse.getStatusCode() == HttpStatus.FORBIDDEN) {
                logger.debug("Call returned a error 403 forbidden resposne ");
                return true;
            }
        }
        return false;
    }
}

Code for using it in RestTemplate:

RestTemplate restclient = new RestTemplate();
restclient.setErrorHandler(new MyResponseErrorHandler());
ResponseEntity<String> responseEntity = clientRestTemplate.exchange(
                    URI,
                    HttpMethod.GET,
                    requestEntity,
                    String.class);
                response = responseEntity.getBody();

Answer 2

I don't see your RestTemplate code, but I assume you to set your ResponseErrorHandler for RestTemplate to use like:

RestTemplate restClient = new RestTemplate();
restClient.setErrorHandler(new MyResponseErrorHandler());

The exception is indeed thrown in handleError method. You can find how to throw CustomException using CustomResponseHandler from one of my previous answers.