在Node.js中设置计时器

I need to run code in Node.js every 24 hours. I came across a function called setTimeout. Below is my code snippet

我需要每24小时在Node.js中运行代码。我遇到了一个名为setTimeout的函数。下面是我的代码片段

var et = require('elementtree');
var XML = et.XML;
var ElementTree = et.ElementTree;
var element = et.Element;
var subElement = et.SubElement;
var data='<?xml version="1.0"?><entries><entry><TenantId>12345</TenantId><ServiceName>MaaS</ServiceName><ResourceID>enAAAA</ResourceID><UsageID>550e8400-e29b-41d4-a716-446655440000</UsageID><EventType>create</EventType><category term="monitoring.entity.create"/><DataCenter>global</DataCenter><Region>global</Region><StartTime>Sun Apr 29 2012 16:37:32 GMT-0700 (PDT)</StartTime><ResourceName>entity</ResourceName></entry><entry><TenantId>44445</TenantId><ServiceName>MaaS</ServiceName><ResourceID>enAAAA</ResourceID><UsageID>550e8400-e29b-41d4-a716-fffffffff000</UsageID><EventType>update</EventType><category term="monitoring.entity.update"/><DataCenter>global</DataCenter><Region>global</Region><StartTime>Sun Apr 29 2012 16:40:32 GMT-0700 (PDT)</StartTime><ResourceName>entity</ResourceName></entry></entries>'
etree = et.parse(data);
var t = process.hrtime();
// [ 1800216, 927643717 ]

setTimeout(function () {
  t = process.hrtime(t);
  // [ 1, 6962306 ]
  console.log(etree.findall('./entry/TenantId').length); // 2
  console.log('benchmark took %d seconds and %d nanoseconds', t[0], t[1]);
  //benchmark took 1 seconds and 6962306 nanoseconds
},1000);

I want to run the above code once per hour and parse the data. For my reference I had used one second as the timer value. Any idea how to proceed will be much helpful.

我想每小时运行一次上面的代码并解析数据。作为我的参考，我使用了一秒作为计时器值。任何想法如何继续将是非常有帮助的。

1 个解决方案

#1

There are basically three ways to go

基本上有三种方法可循

setInterval()
的setInterval（）

The setTimeout(f, n) function waits n milliseconds and calls function f. The setInterval(f, n) function calls f every n milliseconds.

setTimeout（f，n）函数等待n毫秒并调用函数f。 setInterval（f，n）函数每隔n毫秒调用f。

setInterval(function(){
  console.log('test');
}, 60 * 60 * 1000);

This prints test every hour. You could just throw your code (except the require statements) into a setInterval(). However, that seems kind of ugly to me. I'd rather go with:

每小时打印测试一次。您可以将代码（require语句除外）抛出到setInterval（）中。然而，这对我来说似乎有些难看。我宁愿一起去：

Scheduled Tasks Most operating systems have a way of sheduling tasks. On Windows this is called "Scheduled Tasks" on Linux look for cron.

计划任务大多数操作系统都有调度任务的方法。在Windows上，这在Linux上称为“计划任务”，代表cron。
Use a libary As I realized while answering, one could even see this as a duplicate of that question.

使用图书馆正如我在回答时意识到的那样，人们甚至可以将其视为该问题的副本。

#1