我需要一个 Nodejs 调度程序，它允许以不同的时间间隔执行任务
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I need a Nodejs scheduler that allows for tasks at different intervals
提问by user379468
I am looking for a node job schedule that will allow me to schedule a number of tasks at different intervals. For instance,
我正在寻找一个节点作业计划，它允许我以不同的时间间隔安排许多任务。例如，
- call function A every 30 seconds
- call function B every 60 seconds
- call function C every 7 days
- 每 30 秒调用一次函数 A
- 每 60 秒调用一次函数 B
- 每 7 天调用一次函数 C
I also want to be able to start and stop the process.
我还希望能够启动和停止该过程。
So far, I have looked at:
到目前为止，我已经看过：
later- the syntax confuses me, also apparently you cant schedule tasks beyond a month
agenda- seems the most promising, however I'm confused about the database functionality
timeplan- too simple, can't start and stop
I find the syntax of the latter confusing.
我发现后者的语法令人困惑。
回答by Tom
I would recommend node-cron. It allows to run tasksusing Cron patterns e.g.
我会推荐node-cron。它允许使用 Cron 模式运行任务，例如
'* * * * * *' - runs every second
'*/5 * * * * *' - runs every 5 seconds
'10,20,30 * * * * *' - run at 10th, 20th and 30th second of every minute
'0 * * * * *' - runs every minute
'0 0 * * * *' - runs every hour (at 0 minutes and 0 seconds)
But also more complexschedules e.g.
但也有更复杂的时间表，例如
'00 30 11 * * 1-5' - Runs every weekday (Monday through Friday) at 11:30:00 AM. It does not run on Saturday or Sunday.
Sample code: running job every 10 minutes:
示例代码：每 10 分钟运行一次作业：
var cron = require('cron');
var cronJob = cron.job("0 */10 * * * *", function(){
// perform operation e.g. GET request http.get() etc.
console.info('cron job completed');
});
cronJob.start();
You can find more examples in node-cronwiki
您可以在node-cronwiki 中找到更多示例
More on cron configuration can be found on cronwiki
I've been using that library in many projects and it does the job. I hope that will help.
我一直在许多项目中使用该库，它完成了这项工作。我希望这会有所帮助。
回答by Ryan Wu
I've used node-cronand agenda.
node-cronis a very simple library, which provide very basic and easy to understand api like crontab. It doesn't need any config and just works.
node-cron是一个非常简单的库，它提供了非常基本且易于理解的 api，如 crontab。它不需要任何配置，就可以工作。
var cronJob = require('cron').CronJob;
var myJob = new cronJob('00 30 11 * * 1-5', function(){...});
myJob.start();
agendais very powerful and fit for much more complex services. Think about ifttt, you have to run millions of tasks. agendawould be the best choice.
议程非常强大，适合更复杂的服务。想想ifttt，你必须运行数百万个任务。议程将是最好的选择。
Note: You need Mongodbto use Agenda
注意：您需要使用Mongodb才能使用 Agenda
var Agenda = require("Agenda");
var agenda = new Agenda({db: { address: 'localhost:27017/agenda-example'}});
agenda.every('*/3 * * * *', 'delete old users');
agenda.start();
回答by Richard Xue
I think the best ranking is
我认为最好的排名是
1.node-schedule
2.later
3.crontab
1.节点调度
2.以后
3.crontab
and the sample of node-scheduleis below:
节点调度示例如下：
var schedule = require("node-schedule");
var rule = new schedule.RecurrenceRule();
//rule.minute = 40;
rule.second = 10;
var jj = schedule.scheduleJob(rule, function(){
console.log("execute jj");
});
Maybe you can find the answer from node modules.
也许你可以从node modules 中找到答案。
回答by raygerrard
I have written a node module that provides a wrapper around setInterval using moment durations providing a declarative interface:
我编写了一个节点模块，它使用提供声明性接口的时刻持续时间为 setInterval 提供了一个包装器：
npm install every-moment
npm 安装每时每刻
var every = require('every-moment');
var timer = every(5, 'seconds', function() {
console.log(this.duration);
});
every(2, 'weeks', function() {
console.log(this.duration);
timer.stop();
this.set(1, 'week');
this.start();
});
https://www.npmjs.com/package/every-moment
https://www.npmjs.com/package/every-moment
回答by Rodrigo Adachi
nodeJS default
nodeJS 默认
https://nodejs.org/api/timers.html
https://nodejs.org/api/timers.html
setInterval(function() {
// your function
}, 5000);
回答by Simon Rigét
I have written a small module to do just that, called timexe:
我写了一个小模块来做到这一点，称为timexe：
- Its simple,small reliable code and has no dependencies
- Resolution is in milliseconds and has high precision over time
- Cron like, but not compatible (reversed order and other Improvements)
- I works in the browser too
- 其简单、小巧、可靠的代码且无依赖
- 分辨率以毫秒为单位，随着时间的推移具有高精度
- Cron 类似，但不兼容（颠倒顺序和其他改进）
- 我也在浏览器中工作
Install:
安装：
npm install timexe
use:
用：
var timexe = require('timexe');
//Every 30 sec
var res1=timexe(”* * * * * /30”, function() console.log(“Its time again”)});
//Every minute
var res2=timexe(”* * * * *”,function() console.log(“a minute has passed”)});
//Every 7 days
var res3=timexe(”* y/7”,function() console.log(“its the 7th day”)});
//Every Wednesdays
var res3=timexe(”* * w3”,function() console.log(“its Wednesdays”)});
// Stop "every 30 sec. timer"
timexe.remove(res1.id);
you can achieve start/stop functionality by removing/re-adding the entry directly in the timexe job array. But its not an express function.
您可以通过直接在 timexe 作业数组中删除/重新添加条目来实现启动/停止功能。但它不是一个明确的功能。
