methods.js

exports.index = function (request, reply) {
  
  reply('hello world');
};

routes.js

var Methods = require('./methods');

exports.register = function (plugin, options, next) {

  plugin.route({
    method: 'GET',
    path: '/',
    handler: Methods.index
  })
  
  next();
};

exports.register.attributes = {
  name: 'routes'
};

server.js

var Hapi = require('hapi');
var Routes = require('./routes')

var server = new Hapi.Server(3000);

server.pack.register(Routes, function (err) {
  
  server.start(function () {
    
    console.log('Server started');
  })
})