@Override
    public void handleRequest(final RpcContext rpcCtx, final PingRequest request) {
        rpcCtx.sendResponse( //
            RpcFactoryHelper //
                .responseFactory() //
                .newResponse(RpcRequests.ErrorResponse.getDefaultInstance(), 0, "OK"));
    }
@Test
    public void testHandlePing() throws Exception {
        PingRequestProcessor processor = new PingRequestProcessor(null);
        MockAsyncContext ctx = new MockAsyncContext();
        processor.handleRequest(ctx, TestUtils.createPingRequest());
        ErrorResponse response = (ErrorResponse) ctx.getResponseObject();
        assertEquals(0, response.getErrorCode());
    }