Created
December 9, 2018 03:45
-
-
Save ShiningRay/3b8aaeea2fcb2c1db2731949f2469e2e to your computer and use it in GitHub Desktop.
nanomsg req/rep load balancer example
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var nano = require('nanomsg'); | |
const async = require('async') | |
function createWorker(index) { | |
var worker = nano.socket('rep') | |
const endpoint = 'inproc://worker' + index; | |
worker.bind(endpoint); | |
worker.index = index; | |
worker.on('data', (buf) => { | |
var a = buf.toString(); | |
var b = parseFloat(a); | |
console.log(`at ${index} received: ${b}`); | |
worker.send([index, b, (b * 2)].join('=')) | |
}) | |
return worker; | |
} | |
var workers = [] | |
for (var i = 0; i < 5; i++) { | |
workers.push(createWorker(i)); | |
} | |
const balancer = nano.socket('req', { | |
raw: true | |
}); | |
workers.forEach((w) => { | |
balancer.connect('inproc://worker' + w.index); | |
}) | |
const server = nano.socket('rep', { | |
raw: true | |
}); | |
server.bind('inproc://server') | |
nano.device(server, balancer) | |
// Client side /////////////// | |
var client = nano.socket('req') | |
client.connect('inproc://server'); | |
client.on('data', (d) => { | |
console.log('client received: ', d.toString()); | |
}) | |
async.forever((next) => { | |
const r = Math.random(); | |
console.log('sending ' + r) | |
client.send(r); | |
// we must sleep here, otherwise if we use for loop then we can only get the first response | |
setTimeout(next, 100); | |
}) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment