CODEWITHSUNDEEP
node.jssocket.io
Dev Oskii
Dev Oskii

Reputation: 929

Node/Socket.io - How to emit a function/data every x minutes

I have a Node server that is using socket.io. I would like my socket object to emit some data to the connected browser once per minute on the minute. Ideally something like setInterval() but instead of calling every x minutes, look at the time and execute at on the minute.

I imagine it would look something like this, if I wanted to send every 1 minutes. 

var data = "someData";
io.on('connection', function (socket) {
    socket.emit_every_x_minutes(1, 'myData', data)}
});

This would emit "someData" to the client socket periodically every 1 minute.

What is the correct way to emit every x minutes socket.io?

Upvotes: 4

Views: 6618

Answers (2)

Sadhu
Sadhu

Reputation: 890

You can use node-schedule or node-cron modules.

Visit : https://www.npmjs.com/package/node-schedule

or

Visit: http://merencia.com/node-cron/

Upvotes: 1

marchaos
marchaos

Reputation: 3444

Why not use setInterval / setTimeout ?

var data = "someData";
io.on('connection', (socket) => {
    setInterval(() => {
        socket.emit(1, 'myData', data)}
    }, 60 * 1000);
});

If you want on the minute, every minute, without a library:

var data = "someData";
const doEveryMinute = (socket) => {
   setTimeout(() => {
       setInterval(() => doEveryMinute(socket), 60000);
       socket.emit(1, 'myData', data)}
   }, (60 - date.getSeconds()) * 1000);
}

io.on('connection', (socket) => {
    doEveryMinute(socket);
});

If accuracy is important, then you'll want something like https://github.com/kelektiv/node-cron.

Upvotes: 5

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