如何从流程返回到前端后端流程？
[英]How to return from a process to a frontend backend process?
问题描述
I need load 10.000 rows in my database google cloud sql using AppEngine with Java. 
我需要使用Java的AppEngine在数据库Google Cloud sql中加载10.000行。 For this case, i use a proccess using backend, but i want advertise to user, how rows was wrong load? 对于这种情况，我使用后端处理，但是我想向用户做广告，行加载错了吗？ But, i don't know as send a message from my backend proccess to my front to show a message to screen. 但是，我不知道从后端流程向前台发送消息以向屏幕显示消息。
Regards. 问候。
1 个解决方案
解决方案1
1 已采纳 2013-12-16 17:22:51
Maybe you don't need to send callback (from backend to front-end). 也许您不需要发送回调（从后端到前端）。 Maybe you should make the front-end poll to see when these results are ready at the back-end side. 也许您应该进行前端轮询，以查看何时在后端准备好这些结果。 Maybe through some JS/Ajax code which keeps polling on the background and once the results are ready, pulls them and displays them in the designated area of the page. 也许通过一些JS / Ajax代码在后台进行轮询，一旦结果准备好，就将其拉出并显示在页面的指定区域中。 I assume your front-end is a web page. 我假设您的前端是一个网页。
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.