expressJPoolExample.js

const express = require('express')
const app = express()
const Pool = require('jpool');

// middleare                     
app.use((req, res) => {
  const pool = new Pool();
  
  req.job = (filename) => {
    pool.add(path.resolve(__dirname, `jobs/${filename}.js`), req)
  }
})                  

// route
app.post('/email/change', function (req, res) {
  req.job("sendEmail");
  res.send('email change requested')
})

app.listen(3000)