const newrelic = require('newrelic');
const koaNewrelic = require('koa-newrelic')(newrelic, opts);
const Koa = require('koa');
const Router = require('koa-router');
const views = require('koa-views');

const app = new Koa();
const router = new Router;

router.get('/', async function (next) {...});

app
  .use(koaNewrelic);
  .use(views()) // use views middleware could help instrument ctx.render method
  .use(router.routes());

const koaNewrelic = require('koa-newrelic')(newrelic, {
  renderMethodName: 'render',
  middlewareTrace: true,
  groupStaticResources: true,
  staticExtensions: ['js', 'css'],
  customTransactionName: (method, path) => `Koajs/${path.slice(1)}#${method}`
});

router.get('/index', async function ctrA(ctx) {...});
router.post('/login', async function ctrB(ctx) {...});

app
	.use(koaNewrelic)
  .use(serve('/public'));
  .use(router.routes());

/*
  In Newrelic, you will find following transactions

    /index#GET
	  Middleware serve
	  Middleware dispatch
	  Middleware ctrA

	/login#POST
	  Middleware serve
	  Middleware dispatch
	  Middleware ctrB

	/*.js#GET
	  Middleware serve

	/*.css#GET
	  Middleware serve  
*/