Gracefully Shutdown in Bun

I used to think NodeJS nor its alternatives never have any clue for listening to OS quit signals. I used to put tini to make it stopped.

Actually, we can stop them. It’s just the code must be added manually. The code:

process.on('SIGINT', () => {
  console.log('Received SIGINT. Performing graceful shutdown...');
  // Perform cleanup operations here, e.g., close database connections,
  // close open files, stop accepting new requests, etc.
  process.exit(0); // Exit after cleanup
});

process.on('SIGTERM', () => {
  console.log('Received SIGTERM. Performing graceful shutdown...');
  // Perform cleanup operations here
  process.exit(0); // Exit after cleanup
});

To make us in the same page:

bun create hono@latest sample-app

We modify the src/index.ts so it would be like this:

import { Hono } from 'hono'

const app = new Hono()

app.get('/', (c) => {
  return c.text('Hello Hono!')
})

process.on('SIGINT', () => {
  console.log('Received SIGINT. Performing graceful shutdown...');
  // Perform cleanup operations here, e.g., close database connections,
  // close open files, stop accepting new requests, etc.
  process.exit(0); // Exit after cleanup
});

process.on('SIGTERM', () => {
  console.log('Received SIGTERM. Performing graceful shutdown...');
  // Perform cleanup operations here
  process.exit(0); // Exit after cleanup
});

export default app

Now our app will listen to the sound of her people.