@mark01/express-utils/lib/middlewares/busy-handler.js

npm package that contains utilities for express.js

import toobusy from 'toobusy-js';
import { AppError } from '../error';
export const busyHandler = () => (_, __, next) => {
    toobusy.maxLag(200);
    toobusy.interval(750);
    if (toobusy()) {
        next(new AppError('API is currently too busy. Please try again later!', 503));
        return;
    }
    next();
};
export default busyHandler;