Custom response message using MessageContext

Question

I was wondering how I could set a custom response message to my MessageContext? I know how to set the HTTP_RESPONSE_CODE like 200 , 404 etc. on server side and how to read them on client side. But how would I set a custom message like "Bad request, key and value can not be empty"? Is there anything which is intended to be used for creating custom response messages?

Server

@WebServiceProvider
@ServiceMode(value = Service.Mode.PAYLOAD)
public class MWServiceProvider implements Provider<Source> {

    @javax.annotation.Resource(type=WebServiceContext.class)
    private WebServiceContext wsContext;

    @Override
    public Source invoke(Source source) {
        MessageContext messageContext = wsContext.getMessageContext();
        ...
        // read the source content, which is a key-value-pair for this example
        if (keyValuePair.getKey().isEmpty() || keyValuePair.getValue().isEmpty()) {
            // bad request, key or value can not be empty
            messageContext.put(MessageContext.HTTP_RESPONSE_CODE, HttpURLConnection.HTTP_BAD_REQUEST);
            // ??? HOW CAN I SET A CUSTOM MESSAGE LIKE 
            // ??? "Bad request, key and value can not be empty"
            // ??? TO MY MESSAGE RESPONSE CONTEXT?
        } else {
            ...
            messageContext.put(MessageContext.HTTP_RESPONSE_CODE, HttpURLConnection.HTTP_OK);
            ...
        }
        return source;
    }
    ...
}

Read status code on client side:

Map<String, Object> response = dispatch.getResponseContext();
Integer statusCode = (Integer) response.get(MessageContext.HTTP_RESPONSE_CODE);
System.out.println("status_code: " + statusCode);

Answer 1

You have access to the underlying javax.servlet.http.HttpServletResponse via key MessageContext.SERVLET_RESPONSE in your MessageContext . From there you should be able to set the error code and message .