+handler.ts

import type { FastifyPluginAsyncTypebox } from '@fastify/type-provider-typebox';
import { Type } from '@sinclair/typebox';

import cache from '~/utilities/cache';

export default (async (app) => {
  /*
  ```sh
  $ curl --request GET --url http://127.0.0.1:3000/api/hello-world/caching?text=foo
  $ curl --request GET --url http://127.0.0.1:3000/api/hello-world/caching?text=bar
  ```
  */
  app.get(
    '',
    {
      schema: {
        querystring: Type.Object({
          text: Type.String(),
        }),
        response: {
          200: Type.Object({
            message: Type.String(),
          }),
        },
      },
    },
    async (req, reply) => {
      const { text } = req.query;

      const cached = await cache.wrap(
        'myText',
        async () => {
          return { message: text };
        },
        5_000,
      );

      return reply.send(cached);
    },
  );
}) as FastifyPluginAsyncTypebox;