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‎README.md

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Example Voting App
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==================
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This is an example Docker app with multiple services. It is run with Docker Compose and uses Docker Networking to connect containers together.
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Running
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-------
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Since this app makes use of Compose's experimental networking support, it must be started with:
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$ cd vote-apps/
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$ docker-compose --x-networking up -d
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The app will be running on port 5000 on your Docker host, and the results will be on port 5001.

‎vote-apps/docker-compose.yml

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voting-app:
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build: ./voting-app/.
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volumes:
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- ./voting-app:/app
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ports:
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- "5000:80"
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redis:
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image: redis
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ports: ["6379"]
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worker:
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build: ./worker
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db:
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image: postgres:9.4
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volumes:
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- "myvolume:/var/lib/postgresql/data"
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result-app:
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build: ./result-app/.
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volumes:
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- ./result-app:/app
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ports:
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- "5001:80"

‎vote-apps/result-app/Dockerfile

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FROM node:0.10
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RUN mkdir /app
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WORKDIR /app
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ADD package.json /app/package.json
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RUN npm install && npm ls
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RUN mv /app/node_modules /node_modules
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ADD . /app
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ENV PORT 80
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EXPOSE 80
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CMD ["node", "server.js"]

‎vote-apps/result-app/package.json

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{
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"name": "result-app",
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"version": "1.0.0",
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"description": "",
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"main": "server.js",
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"scripts": {
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"test": "echo \"Error: no test specified\" && exit 1"
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},
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"author": "",
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"license": "MIT",
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"dependencies": {
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"body-parser": "^1.14.1",
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"cookie-parser": "^1.4.0",
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"express": "^4.13.3",
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"method-override": "^2.3.5",
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"async": "^1.5.0",
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"pg": "^4.4.3",
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"socket.io": "^1.3.7"
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}
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}

‎vote-apps/result-app/server.js

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var express = require('express'),
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async = require('async'),
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pg = require("pg"),
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cookieParser = require('cookie-parser'),
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bodyParser = require('body-parser'),
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methodOverride = require('method-override'),
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app = express(),
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server = require('http').Server(app),
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io = require('socket.io')(server);
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io.set('transports', ['polling']);
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var port = process.env.PORT || 4000;
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io.sockets.on('connection', function (socket) {
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socket.emit('message', { text : 'Welcome!' });
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socket.on('subscribe', function (data) {
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socket.join(data.channel);
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});
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});
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async.retry(
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{times: 1000, interval: 1000},
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function(callback) {
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pg.connect('postgres://postgres@voteapps_db_1/postgres', function(err, client, done) {
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if (err) {
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console.error("Failed to connect to db");
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}
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callback(err, client);
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});
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},
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function(err, client) {
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if (err) {
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return console.err("Giving up");
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}
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console.log("Connected to db");
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getVotes(client);
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}
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);
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function getVotes(client) {
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client.query('SELECT vote, COUNT(id) AS count FROM votes GROUP BY vote', [], function(err, result) {
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if (err) {
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console.error("Error performing query: " + err);
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} else {
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var data = result.rows.reduce(function(obj, row) {
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obj[row.vote] = row.count;
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return obj;
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}, {});
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io.sockets.emit("scores", JSON.stringify(data));
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}
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setTimeout(function() {getVotes(client) }, 1000);
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});
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}
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app.use(cookieParser());
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app.use(bodyParser());
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app.use(methodOverride('X-HTTP-Method-Override'));
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app.use(function(req, res, next) {
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res.header("Access-Control-Allow-Origin", "*");
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res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
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res.header("Access-Control-Allow-Methods", "PUT, GET, POST, DELETE, OPTIONS");
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next();
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});
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app.use(express.static(__dirname + '/views'));
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app.get('/', function (req, res) {
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res.sendFile(path.resolve(__dirname + '/views/index.html'));
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});
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server.listen(port, function () {
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var port = server.address().port;
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console.log('App running on port ' + port);
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});

‎vote-apps/result-app/views/app.js

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var app = angular.module('catsvsdogs', []);
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var socket = io.connect({transports:['polling']});
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var bg1 = document.getElementById('background-stats-1');
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var bg2 = document.getElementById('background-stats-2');
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app.controller('statsCtrl', function($scope){
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var animateStats = function(a,b){
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if(a+b>0){
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var percentA = a/(a+b)*100;
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var percentB = 100-percentA;
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bg1.style.width= percentA+"%";
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bg2.style.width = percentB+"%";
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}
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};
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$scope.aPercent = 50;
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$scope.bPercent = 50;
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var updateScores = function(){
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socket.on('scores', function (json) {
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data = JSON.parse(json);
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var a = parseInt(data.a || 0);
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var b = parseInt(data.b || 0);
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animateStats(a, b);
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$scope.$apply(function() {
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if(a + b > 0){
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$scope.aPercent = a/(a+b) * 100;
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$scope.bPercent = b/(a+b) * 100;
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$scope.total = a + b
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}
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});
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});
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};
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var init = function(){
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document.body.style.opacity=1;
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updateScores();
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};
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socket.on('message',function(data){
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init();
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});
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});

‎vote-apps/result-app/views/index.html

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<!DOCTYPE html>
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<html ng-app="catsvsdogs">
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<head>
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<meta charset="utf-8">
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<title>Cats vs Dogs -- Result</title>
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<base href="/index.html">
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<meta name = "viewport" content = "width=device-width, initial-scale = 1.0">
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<meta name="keywords" content="docker-compose, docker, stack">
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<meta name="author" content="Tutum dev team">
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<link rel='stylesheet' href='/stylesheets/style.css' />
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</head>
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<body ng-controller="statsCtrl" >
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<div id="background-stats">
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<div id="background-stats-1">
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</div><!--
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--><div id="background-stats-2">
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</div>
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</div>
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<div id="content-container">
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<div id="content-container-center">
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<div id="choice">
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<div class="choice cats">
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<div class="label">Cats</div>
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<div class="stat">{{aPercent | number:1}}%</div>
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</div>
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<div class="divider"></div>
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<div class="choice dogs">
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<div class="label">Dogs</div>
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<div class="stat">{{bPercent | number:1}}%</div>
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</div>
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</div>
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</div>
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</div>
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<div id="result" ng-if="total > 100">
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{{total}} votes
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</div>
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<script src="socket.io.js"></script>
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<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.5/angular.min.js"></script>
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<script src="app.js"></script>
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</body>
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</html>

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