This is a quick example of how to instrument a socket method. https://gist.github.com/adam-hert/006b8da7a9406bc3a2b1ca185a4d4a5e#file-index-js-L15-L23
Documentation: http://docs.traceview.solarwinds.com/Instrumentation/nodejs.html#start-or-continue-a-trace
| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Socket.IO chat</title> | |
| <style> | |
| * { margin: 0; padding: 0; box-sizing: border-box; } | |
| body { font: 13px Helvetica, Arial; } | |
| form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; } | |
| form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; } | |
| form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; } | |
| #messages { list-style-type: none; margin: 0; padding: 0; } | |
| #messages li { padding: 5px 10px; } | |
| #messages li:nth-child(odd) { background: #eee; } | |
| #messages { margin-bottom: 40px } | |
| </style> | |
| </head> | |
| <body> | |
| <ul id="messages"></ul> | |
| <form action=""> | |
| <input id="m" autocomplete="off" /><button>Send</button> | |
| </form> | |
| <script src="https://cdn.socket.io/socket.io-1.2.0.js"></script> | |
| <script src="https://code.jquery.com/jquery-1.11.1.js"></script> | |
| <script> | |
| $(function () { | |
| var socket = io(); | |
| $('form').submit(function(){ | |
| socket.emit('chat message', $('#m').val()); | |
| $('#m').val(''); | |
| return false; | |
| }); | |
| socket.on('chat message', function(msg){ | |
| $('#messages').append($('<li>').text(msg)); | |
| window.scrollTo(0, document.body.scrollHeight); | |
| }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
| var tv = require('traceview'); | |
| tv.traceMode = 'always' | |
| var app = require('express')(); | |
| var http = require('http').Server(app); | |
| var io = require('socket.io')(http); | |
| //this gets traced automatically | |
| app.get('/', function(req, res){ | |
| res.sendFile(__dirname + '/index.html'); | |
| }); | |
| io.on('connection', function(socket){ | |
| //Start a trace manually for specific socket methods | |
| socket.on('chat message', function(msg){ | |
| tv.startOrContinueTrace(null, function (last) { | |
| return last.descend('Chat-Socket') //Chat-Socket can be any string, this will be the layer name | |
| }, function (done) { | |
| // Do some stuff and then call the callback to mark the layer as done | |
| setImmediate(done) | |
| }, function(){ | |
| io.emit('chat message', msg) | |
| }) | |
| }); | |
| }); | |
| //basic hello world node stuff | |
| http.listen(3000, function(){ | |
| console.log('listening on *:' + 3000); | |
| }); |
| { | |
| "name": "socket-chat-example", | |
| "version": "0.0.1", | |
| "description": "my first socket.io app", | |
| "dependencies": { | |
| "express": "^4.15.2", | |
| "socket.io": "^1.7.3", | |
| "traceview": "^2.7.3" | |
| }, | |
| "scripts": { | |
| "start": "node index.js" | |
| } | |
| } |
