// Copyright 2016 Google LLC

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

'use strict';

const express = require('express');

const memjs = require('memjs');

const app = express();

// [START gae_flex_redislabs_memcache]

// Environment variables are defined in app.yaml.

const {MEMCACHE_URL} = process.env;

const mc = memjs.Client.create(MEMCACHE_URL);

// [END gae_flex_redislabs_memcache]

app.get('/', async (req, res, next) => {

try {

const {value} = await mc.get('foo');

if (value) {

res.status(200).send(`Value: ${value.toString('utf-8')}`);

return;

}

await mc.set('foo', `${Math.random()}`, {});

res.redirect('/');

} catch (err) {

next(err);

return;

}

});

const PORT = process.env.PORT || 8080;

const server = app.listen(PORT, () => {

console.log(`App listening on port ${PORT}`);

console.log('Press Ctrl+C to quit.');

});

module.exports = server;