const Metric = require('../metric'); module.exports = (server) => { const metric = Metric(server); server.subscription('/stats/{id}', { onSubscribe: (socket, path, params, next) => { console.log('onSubscribe'); metric.on(params.id); next(); }, onUnsubscribe: (socket, path, params, next) => { console.log('onUnsubscribe'); metric.off(params.id); next(); } }); };