private void handleError(AbstractServerProxy proxy) {
   if (proxy instanceof JsonDimProxy) {
     this.errorMessage =
         ResourceManager.getInstance()
             .getCurrentBundle()
             .getString(IStringCommon.RES_SERVER_ERROR, IStringCommon.FAMILY_COMMON);
     if (proxy.getRequestAction().equals(IServerProxyConstants.ACT_GET_DIM_TOKEN)) {
       notifyDimFinish();
     } else if (proxy.getRequestAction().equals(IServerProxyConstants.ACT_GET_DIM_PTN)) {
       notifyGetPtnMutex();
     }
   }
 }