aws-xray-sdk-fastify: Hooks have no effect unless fastify-plugin is used

[iwaiktos]

In sdk_contrib/fastify/lib/plugin.js:

const xRayFastifyPlugin = async (fastify, opts) => {
  configureAWSXRaySync(fastify, opts);

  fastify.decorateRequest('segment', null);
  fastify
    .addHook('onRequest', onRequestHook)
    .addHook('onResponse', onResponseHook)
    .addHook('onError', onErrorHook);  // (A)
};

(A) request/response/error hooks are added to fastify context.

But this "fastify" is xRayFastifyPlugin's inside (encapsulated) context, so the hooks have no effect outside of the plugin.

Using fastify-plugin will fix this issue, I guess.

const fp = require('fastify-plugin');

(snip)

const xRayFastifyPlugin = fp(async (fastify, opts) => {
  configureAWSXRaySync(fastify, opts);

  fastify.decorateRequest('segment', null);
  fastify
    .addHook('onRequest', onRequestHook)
    .addHook('onResponse', onResponseHook)
    .addHook('onError', onErrorHook);  // (A)
});