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Node.js：长时间延迟

[英]Node.js: long delay

原文 2016-04-27 10:28:49 9 1 javascript/ node.js/ timeout

There is an event after which comes feedback on my server. 有一个事件发生后，服务器上出现了反馈。 I have to send a message to exactly one hour after the event. 我必须在活动结束后的一个小时内发送一条消息。

I can use a setTimeout() but it seems it will not be good. 我可以使用setTimeout()但似乎效果不好。

Perhaps it would be better if I start cron which will check the status of an event from database(such as every minute) 也许如果我启动cron会更好，它将检查数据库中事件的状态（例如每分钟）

Does anyone know of a greater good option for the implementation of such a long delay? 有谁知道实施这样长的延迟的更好的选择？

1 个解决方案

If you require 100% reliability use a cron job. 如果您需要100％的可靠性，请使用cron作业。 The problem with a cron job is that your code will be spread around the place and it would require configuration each time you set up a new server. cron作业的问题是您的代码将散布在各处，并且每次安装新服务器时都需要进行配置。 An alternate approach would be to use an npm package like cron . 另一种方法是使用像cron这样的npm软件包。

The issue with setTimeout() is that if your application crashes/restarts the future function call will be lost. setTimeout()的问题在于，如果您的应用程序崩溃/重新启动，则将来的函数调用将丢失。 However, each time your application starts, it could query the DB and see all missing timeouts and set them appropriately. 但是，每次您的应用程序启动时，它都可以查询数据库并查看所有丢失的超时并进行适当设置。