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Drupal and Node.js

Push your site

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Node.js • Server based JavaScript

• Event driven

• Asynchronous

• Non-blocking

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Node.js – more detail • Single Process

o Great for simplicity

o Must be careful not to block the main event loop

• Multiple threads generated

• Event Loop

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Event Loop

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node.js Webserver http://nodejs.adammalone.net:13337/ var http = require('http'); http.createServer(function (req, res) { res.writeHead(200, { 'Content-Type': 'text/plain' }); res.end('Nice and Simple node.js webserver!\n'); }) .listen(13337); console.log('Server running at http://127.0.0.1:1337/');

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PHP vs Node.js

• Assume I run Reuters/AP

• Necessity for speed in breaking news

• Examples are useful!

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Drupal Integration • ‘Plumbing’ Module: Nodejs Integration http://drupal.org/project/nodejs

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project/nodejs • 5 Main hooks/functions

o hook_nodejs_handlers_info o hook_nodejs_user_channels

o nodejs_send_content_channel_token &

nodejs_send_content_channel_message

o nodejs_enqueue_message

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Simplicity $commands[] = ajax_command_before('#main-wrapper', $output); $message = (object) array( 'channel' => 'chat_nodejs_auth', 'commands' => $commands, 'callback' => 'nodejsExtras', ); nodejs_enqueue_message($message);

(function ($) { Drupal.Nodejs.callbacks.nodejsExtras = { callback: function (message) { Drupal.nodejs_ajax.runCommands(message); } }; }(jQuery));

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Extending • Drupal

o Nodejs chat module o Nodejs comments o Users online block o Breaking News o Heartbeat o File Downloads o Your module here

• Node o mymodule.server.js o Forever o Many others to hook into

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Why Not?

• Node.js isn’t for everything

• Do not use for CPU bound operations

• Callback spaghetti

• Lots of rage online

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Questions nodejs@adammalone.net http://adammalone.net