blocks|key|522710|text|var+minutes+=+5,+the_interval+=+minutes+*+60+*+1000;
setInterval(function()+{
++console.log("I+am+doing+my+5+minutes+check");
++//+do+your+stuff+here
},+the_interval);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|522711|将该代码另存为node_regular_job.js并运行:)|unstyled|522712|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>var minutes = 5, the_interval = minutes * 60 * 1000;
setInterval(function() {
 console.log("I am doing my 5 minutes check");
 // do your stuff here
}, the_interval);
</code></pre>

Save that code as node_regular_job.js and run it :)

blocks|key|739203|text|如果你有一些异步任务要管理，你应该这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|739204|(function+schedule()+{
++++background.asyncStuff().then(function()+{
++++++++console.log('Process+finished,+waiting+5+minutes');
++++++++setTimeout(function()+{
++++++++++++console.log('Going+to+restart');
++++++++++++schedule();
++++++++},+1000+*+60+*+5);
++++}).catch(err+=>+console.error('error+in+scheduler',+err));
})();|code-block|syntax|javascript|739205|您不能保证它何时启动，但如果您的作业执行时间超过5分钟，则至少您不会同时运行多次作业。|739206|您仍然可以使用setInterval来调度异步作业，但是如果您这样做了，那么您至少应该将已处理的任务标记为“正在处理”，以便如果要在前一次完成之前再次调度该作业，您的逻辑可能会决定不处理仍在处理的任务。|offset|length|style|CODE|739207|entityMap^0|0|0|0|7|B|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|T|8|@$K|U|L|V|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

This is how you should do if you had some async tasks to manage:

<pre><code>(function schedule() {
 background.asyncStuff().then(function() {
 console.log('Process finished, waiting 5 minutes');
 setTimeout(function() {
 console.log('Going to restart');
 schedule();
 }, 1000 * 60 * 5);
 }).catch(err =&gt; console.error('error in scheduler', err));
})();
</code></pre>

You cannot guarantee however when it will start, but at least you will not run multiple time the job at the same time, if your job takes more than 5 minutes to execute.

You may still use <code>setInterval</code> for scheduling an async job, but if you do so, you should at least flag the processed tasks as "being processed", so that if the job is going to be scheduled a second time before the previous finishes, your logic may decide to not process the tasks which are still processed.

blocks|key|739257|text|当从代码控制作业时，@alessioalex+has+the+right+answer，但其他人可能会在这里跌跌撞撞地寻找命令行界面解决方案。你不能打败sloth-cli。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|739258|例如，只需运行sloth+5+"npm+start"即可每5分钟运行一次npm+start。|739259|This+project有一个package.json用法示例。|739260|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/8012484/3931488|1|https://www.npmjs.com/package/sloth-cli|2|https://github.com/Vandivier/udacity-apify/blob/master/package.json^0|24|9|A|X|0|24|9|1|0|7|J|10|9|0|F|C|0|C|2|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@$9|Y|A|Z|1|10]|$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|19|8|@$9|1A|A|1B|B|C]]|D|@$9|1C|A|1D|1|1E]]|E|$]]|$1|J|3|-4|5|6|7|1F|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]|R|$5|M|N|O|E|$P|S]]|T|$5|M|N|O|E|$P|U]]]]

<a href="https://stackoverflow.com/a/8012484/3931488">@alessioalex has the right answer</a> when controlling a job from the code, but others might stumble over here looking for a CLI solution. You can't beat <a href="https://www.npmjs.com/package/sloth-cli" rel="nofollow noreferrer"><code>sloth-cli</code></a>.

Just run, for example, <code>sloth 5 "npm start"</code> to run <code>npm start</code> every 5 minutes.

<a href="https://github.com/Vandivier/udacity-apify/blob/master/package.json" rel="nofollow noreferrer">This project</a> has an example <code>package.json</code> usage.

blocks|key|739266|text|您可以使用this+package|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|739267|var+cron+=+require('node-cron');

cron.schedule('*/5+*+*+*+*',+()+=>+{
++console.log('running+a+task+5+minutes');
});|code-block|syntax|javascript|739268|entityMap|0|LINK|mutability|MUTABLE|url|https://www.npmjs.com/package/node-cron^0|5|C|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

You can use <a href="https://www.npmjs.com/package/node-cron" rel="noreferrer">this package</a>

<pre><code>var cron = require('node-cron');

cron.schedule('*/5 * * * *', () =&gt; {
 console.log('running a task 5 minutes');
});
</code></pre>

I'm new to node.js. I need node.js to query a mongodb every five mins, get specific data, then using socket.io, allow subscribed web clients to access this data. I already have the socket.io part set up and of course mongo, I just need to know how to have node.js run every five minutes then post to socket.io.

What's the best solution for this?

Thanks

Schedule Node.js job every five minutes

我是node.js的新手。我需要node.js每五分钟查询一次mongodb，获取特定的数据，然后使用socket.io，允许订阅的web客户端访问这些数据。我已经设置了socket.io部分，当然，我只需要知道如何让node.js每五分钟运行一次，然后发布到socket.io。对此最好的解决方案是什么？谢谢

问每五分钟安排一次Node.js作业
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