How to use

RestErrorCallback

in

org.jboss.errai.enterprise.client.jaxrs.api

@Override
@SuppressWarnings("Duplicates")
public boolean error(final Request message, final Throwable caught) throws MissingPageRoleException {
 return wrapped.error(message, caught) && handler.handleException(caught);
}

@Override
@SuppressWarnings("Duplicates")
public boolean error(final Request message, final Throwable caught) throws MissingPageRoleException {
 return wrapped.error(message, caught) && handler.handleException(caught);
}

protected void handleError(final Throwable throwable, final Request request, final Response response) {
 final ErrorCallback<?> errorCallback = getErrorCallback();
 if (errorCallback != null) {
  if (errorCallback instanceof RestErrorCallback) {
   ((RestErrorCallback) errorCallback).error(request, throwable);
  }
  else {
   /*
    * Because of type erasure, there's no way to know if an ErrorCallback that doesn't implement RestErrorCallback takes
    * a request as an argument. But in some cases we want to wrap callbacks (such as in Caller<T>) to further control when
    * they are executed, and this is done in code upstream of RestErrorCallback.
    *
    * Thus, here we simply try to invoke with a request, and fallback to passing null if we get a casting exception.
    */
   try {
    ((ErrorCallback<? super Request>) errorCallback).error(request, throwable);
   }
   catch (final ClassCastException e) {
    logger.debug("Class cast exception when invoking error callback with request object: {}", request);
    logger.debug("Invoking error callback again with null.");
    errorCallback.error(null, throwable);
   }
  }
 }
 else {
  GWT.log(throwable.getMessage(), throwable);
 }
}