使用MessageContext定製響應消息

Question

我想知道如何設置自定義響應消息給我的MessageContext？我知道如何在服務器端設置HTTP_RESPONSE_CODE，如200,404等，以及如何在客戶端讀取它們。但是，我將如何設置一個自定義消息，如「錯誤的請求，鍵和值不能爲空」？是否有任何旨在用於創建自定義響應消息的內容？在客戶端

服務器

@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; 
    } 
    ... 
} 

讀狀態代碼：

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

Answer 1

您的MessageContext通過關鍵MessageContext.SERVLET_RESPONSE訪問底層javax.servlet.http.HttpServletResponse。從那裏你應該能夠設置error code and message。