How to upgrade to 4.x ?

[j0k3r]

As the 4.x is a major release and no UPGRADE.md file exist in the repo, I was wondering how should we upgrade from the 3.4.0 version ?

[brettstack]

Thanks! Added https://github.com/vendia/serverless-express/blob/mainline/UPGRADE.md

[brettstack]

Let me know if you have encounter any issues :)

[j0k3r]

Great, thanks!
We were using that method to speedup warm function:

import serverlessExpress from '@vendia/serverless-express'
import app from 'src/app'
import configureApp from 'src/configureApp'

// global variable server to keep hot in lambda
// server is set at the first call and reused then
let server

export default async (event, context) => {
  if (server) {
    return serverlessExpress.proxy(server, event, context, 'PROMISE').promise
  }

  console.log('Server does not exist')

  try {
    // init dbs connexion, middleware and other stuff
    await configureApp(app)
  } catch (e) {
    console.error(e)
  }

  // other initialization

  server = serverlessExpress.createServer(app)

  return serverlessExpress.proxy(server, event, context, 'PROMISE').promise
}

It looks like it's a bit more complicated now that we can't init the server and pass event & context later?

[brettstack]

You should be able to do something like this #351 (comment)

[j0k3r]

It worked. Thanks

I used:

import serverlessExpress from '@vendia/serverless-express'
import app from 'src/app'
import configureApp from 'src/configureApp'

// global variable server to keep hot in lambda
// server is set at the first call and reused then
let server

export default async (event, context) => {
  if (server) {
    return server(event, context)
  }

  console.log('Server does not exist')

  try {
    // init dbs connexion, middleware and other stuff
    await configureApp(app)
  } catch (e) {
    console.error(e)
  }

  // other initialization

  server = serverlessExpress({ app }).handler

  return server(event, context)
}

An other question we do have a lot of debug message now which are quite huge (it killed a chrome tab just to try to view it on Cloudwatch):

How can we disable them?

[brettstack]

Ahh good point. Originally this was using Winston and would only log when NODE_ENV === 'development'. I'll get a fix out, but you do also have the option of providing your own log object https://github.com/vendia/serverless-express#log

[brettstack]

I've pushed a patch that at least doesn't log debug for production builds. Will get something better in soon to allow setting log.level without needing to specify the other log methods

[github-actions]

🎉 This issue has been resolved in version 4.2.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[j0k3r]

Thanks, finally used that snippet and it worked as expected!

import serverlessExpress from '@vendia/serverless-express'
import app from 'src/app'
import configureApp from 'src/configureApp'

// global variable server to keep hot in lambda
// server is set at the first call and reused then
let server

export default async (event, context) => {
  if (server) {
    return server(event, context)
  }

  console.log('Server does not exist')

  try {
    // init dbs connexion, middleware and other stuff
    await configureApp(app)
  } catch (e) {
    console.error(e)
  }

  // other initialization

  server = serverlessExpress({ app })

  return server(event, context)
}

[sudhirjena]

@j0k3r - Could you please share the a code snippet for configureApp. I am also running into a similar issue but unsure what your configureApp does?

[j0k3r]

@sudhirjena Here is a short version:

import app from './app'

app.set('isProduction', process.env.NODE_ENV === 'prod')
app.set('json spaces', 2)

export default (application) => {
  application.set('app:ready', true)

  return application
}

And app.js:

import express from 'express'

process.env.TZ = 'Europe/Paris'

export default express()