@SuppressWarnings("unchecked") private JsonRpcResponse dispatchJsonRpcRequest(JsonRpcRequest rpcRequest, OrangeContext cxt) { JsonRpcResponse jsonResponse = new JsonRpcResponse(rpcRequest.getId(), JsonNull.INSTANCE, JsonNull.INSTANCE, HttpServletResponse.SC_OK); try { ServiceMethodHandler handler = handlers.getMethodHandler(rpcRequest.getMethod()); Message innerRequest = convertJsonToProtobuf(handler, rpcRequest); JsonElement idElement = rpcRequest.getId(); if (idElement == null) { jsonResponse.setId(new JsonPrimitive(-1)); } Message innerResponse = invokeHandlerChain(rpcRequest.getMethod(), handler, innerRequest, cxt); jsonResponse.setResult(ProtobufUtil.protobufToJson(innerResponse)); } catch (RpcCallException rpcEx) { logger.debug("Error processing request", rpcEx); jsonResponse.setError(rpcEx.toJson()); jsonResponse.setStatusCode(rpcEx.getCategory().getHttpStatus()); } catch (Exception ex) { logger.warn("Error processing request", ex); if (ex.getMessage() != null) { jsonResponse.setError(new JsonPrimitive(ex.getMessage())); } jsonResponse.setStatusCode(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); } return jsonResponse; }