The bootstrap comes preloaded with sockets! This feature is turned off by default but can be turned on via the application config.
The server uses express-ws. By default, all socket messages are stringified JSON objects containing an instruction and data.

To enable sockets use this config block:

{
  "websocket": {
    "enabled": true
  }
}

To catch updates from clients use the following code:

const NextBootstrap = require('@dpdk/bootstrap');
const bootstrap = new NextBootstrap(__dirname, process.cwd(), nextConfig);

bootstrap.websocket.update = (ws, data) => {
  // Custom code here
  console.log('Socket Data: ', data);
};

bootstrap.init();

To send updates to all sockets the bootstrap exposes the following function:

const NextBootstrap = require('@dpdk/bootstrap');
const bootstrap = new NextBootstrap(__dirname, process.cwd(), nextConfig);

bootstrap.init();

// Send update to all sockets
bootstrap.websocket.send("hello", {
  some: "data"
});

To catch socket connects use the following code:

const NextBootstrap = require('@dpdk/bootstrap');
const bootstrap = new NextBootstrap(__dirname, process.cwd(), nextConfig);

bootstrap.websocket.connect = (ws) => {
  // Custom code here
};

bootstrap.init();

To catch socket disconnects use the following code:

const NextBootstrap = require('@dpdk/bootstrap');
const bootstrap = new NextBootstrap(__dirname, process.cwd(), nextConfig);

bootstrap.websocket.disconnect = (ws) => {
  // Custom code here
};

bootstrap.init();

Additional Express WS Documentation: https://www.npmjs.com/package/express-ws

Additional WebSocket Documentation: https://developer.mozilla.org/en-US/docs/Web/API/WebSocket