Problem with REST Service Interceptor

[shut_desert]

I have a problem with the Interceptor. When executing proceed, there is an error: ClassCastException: ServerMessage cannot be cast to com.google.gwt.http.client.Response

What's the problem?

@Remote
public interface CustomerService {
    @InterceptedCall(SimpleInterceptor.class)
    public String getCustomerName();
}

@Service
public class CustomerServiceImpl implements CustomerService{
    @Override
    public String getCustomerName() {
        return "Answer from server";
    }
}

public class SimpleInterceptor implements RestClientInterceptor {
    @Override
    public void aroundInvoke(RestCallContext context) {
        context.proceed(new ResponseCallback() {
            @Override
            public void callback(Response response) {
                int statusCode = response.getStatusCode();
                if (statusCode == 200) {
                    GWT.log("it's ok");
                }
                if (statusCode == 404) {
                    GWT.log("Error 404");
                    // to do something
                }
            }
        });
    }
}

Client called the service:

remoteService.call(new RemoteCallback<ServerMessage>() {
                   @Override
                   public void callback(ServerMessage response) {
                       Window.alert(response.getText()+" called in HeaderController");
                   }
               }).getMessage();

[csa]

Hi,

Unfortunately, using two different type of callbacks (at the call site and in the interceptor) wasn't originally supported. You will need to upgrade to the latest 3.0-SNAPSHOTs or 2.4.4-SNAPSHOTs to make this work.

If you're intercepting the response using a different callback you will also need to make sure to set the result in the call context so that the original callback (the callback provided at the call site) can be invoked.

public class SimpleInterceptor implements RestClientInterceptor {  
        @Override  
        public void aroundInvoke(final RestCallContext context) {  
            context.proceed(new ResponseCallback() {  
                @Override  
                public void callback(Response response) {  
                    int statusCode = response.getStatusCode();  
                    if (statusCode == 200) {  
                        GWT.log("it's ok");  
                        context.setResult(Marshalling.fromJSON(response.getText()));
                    }  
                    if (statusCode == 404) {  
                        GWT.log("Error 404");  
                        // to do something  
                    }  
                }  
            });  
        }  
    } 

[csa]

There's also an easier solution that doesn't require you to upgrade (using both a RemoteCallback and an ErrorCallback instead of a ResponseCallback in your interceptor):

public class SimpleInterceptor implements RestClientInterceptor {
        @Override
        public void aroundInvoke(final RestCallContext context) {
          context.proceed(

            new RemoteCallback<ServerMessage>() {
               @Override
               public void callback(ServerMessage serverMessage) { 
                 GWT.log("it's ok");
               }
            },

            new RestErrorCallback() {
              @Override
              public boolean error(Request message, Throwable throwable) {
                try {
                  throw throwable;
                } 
                catch(ResponseException re) {
                  if (re.getResponse().getStatusCode() == 404) {
                    // react to 404
                  }
                  // react to other error codes...        
                }
                catch (Throwable t) {
        
                }
                return false;
            }
          ));
        }
    }

Cheers,

Christian

[shut_desert]

Christian,tell me please.I used for errai: 3.0.0.20131101-M2. I have a problem with the current task. When I call the service, there is an error: JSONException.

What am I doing wrong?