├── .gitignore ├── README.md ├── docs └── reactive-demo.gif ├── example.sql ├── index.html ├── index.js ├── package.json ├── public ├── ScoreItem.js ├── ScoreList.js ├── applyDiff.js ├── dist │ ├── JSXTransformer-0.12.2.js │ ├── jquery.min.js │ ├── lodash.js │ ├── react-0.12.2.js │ └── sockjs.min.js ├── main.css └── results.js └── settings.js /.gitignore: -------------------------------------------------------------------------------- 1 | *.*~ 2 | *.swp 3 | *.swo 4 | .npm 5 | node_modules 6 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Reactive MySQL example application 2 | 3 | A reactive scoreboard built using the following Javascript components: 4 | 5 | * [mysql-live-select](https://github.com/numtel/mysql-live-select) - Provide events on `SELECT` statement result set updates 6 | * [Express](http://expressjs.com) - Web framework 7 | * [SockJS](http://sockjs.org) - WebSocket emulation 8 | * [React](http://reactjs.org) - User interface library 9 | 10 | Click on a player to select and then click on the arrow to increment their score. 11 | 12 | ![Demo action GIF](docs/reactive-demo.gif) 13 | 14 | Insert, increment and delete operations are latency-compensated. 15 | 16 | ## Installation 17 | 18 | Installation requires configuring a MySQL server to output a binary log. See the [`mysql-live-select` Readme](https://github.com/numtel/mysql-live-select) for more information. 19 | 20 | ```bash 21 | $ git clone https://github.com/numtel/reactive-mysql-example.git 22 | $ cd reactive-mysql-example 23 | $ npm install 24 | # Update MySQL configuration 25 | $ vim settings.js 26 | # Add example data to MySQL server 27 | $ mysql < example.sql 28 | # Start server on port 5000 29 | $ node index.js 30 | ``` 31 | 32 | ## License 33 | 34 | [Unlicense](http://unlicense.org/) 35 | 36 | -------------------------------------------------------------------------------- /docs/reactive-demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/numtel/reactive-mysql-example/dfd4255fc2f70754d63cb264e497faa33279bb04/docs/reactive-demo.gif -------------------------------------------------------------------------------- /example.sql: -------------------------------------------------------------------------------- 1 | 2 | CREATE TABLE `players` ( 3 | `id` int(11) NOT NULL AUTO_INCREMENT, 4 | `name` varchar(45) DEFAULT NULL, 5 | `score` int(11) NOT NULL DEFAULT '0', 6 | PRIMARY KEY (`id`) 7 | ) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=latin1; 8 | 9 | INSERT INTO `players` (`name`, `score`) VALUES 10 | ('Kepler', 40),('Leibniz',50),('Maxwell',60),('Planck',70); 11 | -------------------------------------------------------------------------------- /index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Reactive MySQL example 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |

Scoreboard

23 |
24 | 25 | 26 | -------------------------------------------------------------------------------- /index.js: -------------------------------------------------------------------------------- 1 | var express = require('express'); 2 | var sockjs = require('sockjs'); 3 | var http = require('http'); 4 | var LiveSelect = require('mysql-live-select'); 5 | 6 | var dbSettings = require('./settings'); 7 | var sockOptions = { 8 | sockjs_url: "http://cdn.jsdelivr.net/sockjs/0.3.4/sockjs.min.js" 9 | }; 10 | 11 | // Initialize components 12 | var liveDb = new LiveSelect(dbSettings); 13 | var app = express(); 14 | var server = http.createServer(app); 15 | var sock = sockjs.createServer(sockOptions); 16 | 17 | // Cache socket connections 18 | var connected = []; 19 | 20 | // Initialze result set 21 | var results = liveDb.select('select * from players order by score desc', [ { 22 | table: 'players' 23 | } ]).on('update', function(diff, data){ 24 | var msg = JSON.stringify({ 25 | type: 'diff', 26 | data: diff 27 | }); 28 | // Send change to all clients 29 | connected.forEach(function(conn){ 30 | conn.write(msg); 31 | }); 32 | }); 33 | 34 | // Socket event handler 35 | sock.on('connection', function(conn) { 36 | connected.push(conn); 37 | 38 | // Provide initial result set snapshot 39 | conn.write(JSON.stringify({ 40 | type: 'init', 41 | data: results.data 42 | })); 43 | 44 | // Handle incoming message from client 45 | conn.on('data', function(message) { 46 | var data = JSON.parse(message); 47 | switch(data.type){ 48 | case 'increment': 49 | var id = parseInt(data.id, 10); 50 | if(id > 0){ 51 | liveDb.db.query('UPDATE players SET score=score+1 WHERE id=' + 52 | liveDb.db.escape(id)); 53 | } 54 | break; 55 | case 'delete': 56 | var id = parseInt(data.id, 10); 57 | if(id > 0){ 58 | liveDb.db.query('DELETE FROM players WHERE id=' + 59 | liveDb.db.escape(id)); 60 | } 61 | break; 62 | case 'insert': 63 | var name = String(data.name); 64 | if(name.length > 0 && name.length < 45){ 65 | liveDb.db.query('INSERT INTO players (`name`, `score`) VALUES (' + 66 | liveDb.db.escape(name) + ', 0)'); 67 | } 68 | } 69 | }); 70 | 71 | conn.on('close', function() { 72 | // On close, remove connection from connection list 73 | var index = connected.indexOf(conn); 74 | connected.splice(index, 1); 75 | }); 76 | }); 77 | 78 | // Express configuration 79 | sock.installHandlers(server, { prefix:'/sock' }); 80 | 81 | app.get('/', function (req, res) { 82 | res.sendFile(__dirname + '/index.html'); 83 | }); 84 | 85 | app.use('/', express.static(__dirname + '/public')); 86 | 87 | server.listen(5000); 88 | 89 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "mysql-example", 3 | "version": "1.1.0", 4 | "description": "Example showing reactive MySQL", 5 | "main": "index.js", 6 | "scripts": { 7 | "test": "echo \"Error: no test specified\" && exit 1" 8 | }, 9 | "keywords": [ 10 | "express", 11 | "mysql", 12 | "sockets", 13 | "reactive" 14 | ], 15 | "author": "Ben Green (http://github.com/numtel)", 16 | "license": "MIT", 17 | "dependencies": { 18 | "express": "^4.13.3", 19 | "mysql-live-select": "1.0.3", 20 | "sockjs": "^0.3.15" 21 | } 22 | } 23 | -------------------------------------------------------------------------------- /public/ScoreItem.js: -------------------------------------------------------------------------------- 1 | var ScoreItem = React.createClass({ 2 | onClick: function() { 3 | this._owner.setState({ active: this }); 4 | }, 5 | increment: function() { 6 | incrementScore(this.props.item.id); 7 | // Latency compensation 8 | this.setState({ score: (this.state.score || this.props.item.score) + 1 }); 9 | }, 10 | remove: function() { 11 | deletePlayer(this.props.item.id); 12 | // Latency compensation 13 | this.setState({ deleted: true }); 14 | }, 15 | getInitialState: function() { 16 | return { 17 | score: null, 18 | deleted: false 19 | }; 20 | }, 21 | componentWillReceiveProps: function(nextProps) { 22 | if(this.state.score){ 23 | // Reset latency compensation 24 | this.setState({ score: null }); 25 | } 26 | }, 27 | render: function() { 28 | var item = this.props.item; 29 | var score = this.state.score || item.score; 30 | var isActive = this._owner.state.active === this; 31 | var className = this.state.deleted ? 'hidden' : 32 | isActive ? 'active' : ''; 33 | return ( 34 |
  • 35 | {item.name} 36 | 37 | Increment Score 38 | 39 | × 40 | {score} 41 |
    • 42 | ); 43 | } 44 | }); 45 | -------------------------------------------------------------------------------- /public/ScoreList.js: -------------------------------------------------------------------------------- 1 | var ScoreList = React.createClass({ 2 | getInitialState: function() { 3 | return { 4 | active: null, 5 | newItems: [] 6 | }; 7 | }, 8 | submitInsert: function(event){ 9 | event.preventDefault(); 10 | var input = event.target.querySelector('input'); 11 | 12 | if(input.value.length > 45){ 13 | return alert('Name too long (maximum 45 characters)'); 14 | } 15 | 16 | insertPlayer(input.value); 17 | 18 | // Latency compensation 19 | var newItems = this.state.newItems; 20 | newItems.push({ 21 | id: 'x-' + newItems.length, 22 | name: input.value, 23 | score: 0 24 | }); 25 | this.setState({ newItems: newItems }); 26 | 27 | // Reset form 28 | input.value = ""; 29 | }, 30 | componentWillReceiveProps: function(nextProps) { 31 | if(this.state.newItems.length){ 32 | // Reset latency compensation 33 | this.setState({ newItems: [] }); 34 | } 35 | }, 36 | render: function() { 37 | var results = this.props.results; 38 | var newItems = this.state.newItems; 39 | var items = []; 40 | for(var i = 0; i < results.length; i++){ 41 | items.push(); 42 | } 43 | // Also append items in latency-compensation array 44 | for(var i = 0; i < newItems.length; i++){ 45 | items.push(); 46 | } 47 | return ( 48 |
    49 |
      {items}
    50 |
    51 | 52 | 53 |
    54 |
    55 | ); 56 | } 57 | }); 58 | -------------------------------------------------------------------------------- /public/applyDiff.js: -------------------------------------------------------------------------------- 1 | window.applyDiff = function(data, diff) { 2 | data = _.clone(data, true).map(function(row, index) { 3 | row._index = index + 1; 4 | return row; 5 | }); 6 | 7 | var newResults = data.slice(); 8 | 9 | diff.removed !== null && diff.removed.forEach( 10 | function(removed) { newResults[removed._index - 1] = undefined; }); 11 | 12 | // Deallocate first to ensure no overwrites 13 | diff.moved !== null && diff.moved.forEach( 14 | function(moved) { newResults[moved.old_index - 1] = undefined; }); 15 | 16 | diff.copied !== null && diff.copied.forEach(function(copied) { 17 | var copyRow = _.clone(data[copied.orig_index - 1]); 18 | copyRow._index = copied.new_index; 19 | newResults[copied.new_index - 1] = copyRow; 20 | }); 21 | 22 | diff.moved !== null && diff.moved.forEach(function(moved) { 23 | var movingRow = data[moved.old_index - 1]; 24 | movingRow._index = moved.new_index; 25 | newResults[moved.new_index - 1] = movingRow; 26 | }); 27 | 28 | diff.added !== null && diff.added.forEach( 29 | function(added) { newResults[added._index - 1] = added; }); 30 | 31 | var result = newResults.filter(function(row) { return row !== undefined; }); 32 | 33 | return result.map(function(row) { 34 | row = _.clone(row); 35 | delete row._index; 36 | return row; 37 | }); 38 | } 39 | -------------------------------------------------------------------------------- /public/dist/jquery.min.js: -------------------------------------------------------------------------------- 1 | /*! jQuery v1.7.1 jquery.com | jquery.org/license */ 2 | (function(a,b){function cy(a){return f.isWindow(a)?a:a.nodeType===9?a.defaultView||a.parentWindow:!1}function cv(a){if(!ck[a]){var b=c.body,d=f("<"+a+">").appendTo(b),e=d.css("display");d.remove();if(e==="none"||e===""){cl||(cl=c.createElement("iframe"),cl.frameBorder=cl.width=cl.height=0),b.appendChild(cl);if(!cm||!cl.createElement)cm=(cl.contentWindow||cl.contentDocument).document,cm.write((c.compatMode==="CSS1Compat"?"":"")+""),cm.close();d=cm.createElement(a),cm.body.appendChild(d),e=f.css(d,"display"),b.removeChild(cl)}ck[a]=e}return ck[a]}function cu(a,b){var c={};f.each(cq.concat.apply([],cq.slice(0,b)),function(){c[this]=a});return c}function ct(){cr=b}function cs(){setTimeout(ct,0);return cr=f.now()}function cj(){try{return new a.ActiveXObject("Microsoft.XMLHTTP")}catch(b){}}function ci(){try{return new a.XMLHttpRequest}catch(b){}}function cc(a,c){a.dataFilter&&(c=a.dataFilter(c,a.dataType));var d=a.dataTypes,e={},g,h,i=d.length,j,k=d[0],l,m,n,o,p;for(g=1;g0){if(c!=="border")for(;g=0===c})}function S(a){return!a||!a.parentNode||a.parentNode.nodeType===11}function K(){return!0}function J(){return!1}function n(a,b,c){var d=b+"defer",e=b+"queue",g=b+"mark",h=f._data(a,d);h&&(c==="queue"||!f._data(a,e))&&(c==="mark"||!f._data(a,g))&&setTimeout(function(){!f._data(a,e)&&!f._data(a,g)&&(f.removeData(a,d,!0),h.fire())},0)}function m(a){for(var b in a){if(b==="data"&&f.isEmptyObject(a[b]))continue;if(b!=="toJSON")return!1}return!0}function l(a,c,d){if(d===b&&a.nodeType===1){var e="data-"+c.replace(k,"-$1").toLowerCase();d=a.getAttribute(e);if(typeof d=="string"){try{d=d==="true"?!0:d==="false"?!1:d==="null"?null:f.isNumeric(d)?parseFloat(d):j.test(d)?f.parseJSON(d):d}catch(g){}f.data(a,c,d)}else d=b}return d}function h(a){var b=g[a]={},c,d;a=a.split(/\s+/);for(c=0,d=a.length;c)[^>]*$|#([\w\-]*)$)/,j=/\S/,k=/^\s+/,l=/\s+$/,m=/^<(\w+)\s*\/?>(?:<\/\1>)?$/,n=/^[\],:{}\s]*$/,o=/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,p=/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,q=/(?:^|:|,)(?:\s*\[)+/g,r=/(webkit)[ \/]([\w.]+)/,s=/(opera)(?:.*version)?[ \/]([\w.]+)/,t=/(msie) ([\w.]+)/,u=/(mozilla)(?:.*? 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AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 21 | THE SOFTWARE. 22 | */ 23 | 24 | // JSON2 by Douglas Crockford (minified). 25 | var JSON;JSON||(JSON={}),function(){function str(a,b){var c,d,e,f,g=gap,h,i=b[a];i&&typeof i=="object"&&typeof i.toJSON=="function"&&(i=i.toJSON(a)),typeof rep=="function"&&(i=rep.call(b,a,i));switch(typeof i){case"string":return quote(i);case"number":return isFinite(i)?String(i):"null";case"boolean":case"null":return String(i);case"object":if(!i)return"null";gap+=indent,h=[];if(Object.prototype.toString.apply(i)==="[object Array]"){f=i.length;for(c=0;c1?this._listeners[a]=d.slice(0,e).concat(d.slice(e+1)):delete this._listeners[a];return}return},d.prototype.dispatchEvent=function(a){var 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