CD
Cloudflare Developers•5d ago
marbemac

With wrangler 4, can the using keyword replace the need to manually manage ctx.waitUntil?

For example to manage a db connection, would the below work as expected? And if so, any drawback vs the old waitUntil approach? 
const getConnection = async () => {
  const connection = await getDb();

  return {
    connection,
    [Symbol.asyncDispose]: async () => {
      await connection.close();
    },
  };
};

// CF worker fetch handler
export default {
  async fetch(request, env, ctx) {
    await using db = getConnection();

    // vs old ctx.waitUntil approach
    // ctx.waitUntil(db.connection.close());

    return new Response(`Hi`);
  },
};
const getConnection = async () => {
  const connection = await getDb();

  return {
    connection,
    [Symbol.asyncDispose]: async () => {
      await connection.close();
    },
  };
};

// CF worker fetch handler
export default {
  async fetch(request, env, ctx) {
    await using db = getConnection();

    // vs old ctx.waitUntil approach
    // ctx.waitUntil(db.connection.close());

    return new Response(`Hi`);
  },
};
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