Node.js, toy or power tool ?

Node.js is a relatively newcomer in server side platforms but has garnered the attention of both developers and businesses. We will explore if it lives up to the hype, the ecosystem, where is it a good fit and where it falls short.

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1. Node.js, toy or power tool? Jacksonville Code Camp, 2012 Ovidiu Dimulescu @odimulescu speakerdeck.com/odimulescu
2. • What problem? • How’s Node.js helping? • Use cases • Industry support • Coding in Node.js • Ecosystem • Questions ? Agenda
3. About @odimulescu • Working on the Web since 1997 • • Organizer for JaxMUG.com • Co-Organizer for Jax Big Data meetup
4. Node.js - What’s the problem? Fast CPUs Spinning wheels How do we saturate the CPU doing useful work?
5. Node.js - How’s it helping? • Uses event-driven, non-blocking IO • Enforces async throughout*
6. Multi-Threaded Servers *Credit: blog.cloudfoundry.com
7. Node.js - Single Thread, Event-ed *Credit: blog.cloudfoundry.com
8. Node.js - Concurrency Node.js Event Loop Rq1 Rq2 Rq1 Rq2 Green - Request Executing Red - IO wait
9. Node.js - Concurrency Higher Concurrency Same Latency Thread Node.js
10. Node.js - Been there, done that Event Machines • - Twisted • - EventMachine • - Mina, Netty, Atmosphere, vertx.io • - POE Others • Erlang • Scala / Akka
11. Node.js - But ... They mix async with sync and the mentality is towards sync in libraries, drivers etc.
12. • Proxy between different data layers • Soft real-time apps • Crawlers • CLI tools • Quick prototyping • Lower HW and Operational cost* Node.js - Use Cases
13. • Culture mismatch • Uses Javascript • Requests are CPU intensive • Apps relies on specific libraries / functionality • Transactional systems Node.js - Not best fit
14. Node.js - Industry Support
15. Node.js - Industry Usage
16. 1. Go to nodejs.org 2. Download and run installer Node.js - Installation
17. 1. Go to nodejs.org 2. Download and run installer What’s included? node - binary npm - cli package manager built-in support for http, net, dns Node.js - Installation
18. 1. Regular Installation 2. Make it a service Windows - NSSM, srvany, etc. Unix - Distro dependent 3. Front-end WS Integration IIS 7+ Integration - iisnode Apache - mod_proxy or mod_rewrite Nginx - rewrite or proxy HAProxy, stunnel Node.js - Server Installation
19. Lowest privileges Unix: drop to non-root via setuid / setguid Front with a secure Proxy Enable safeguards “use strict” Node.js - Considerations
20. CLI Version - helloworld.js console.log(“Hello world”); $ node helloworld.js Hello World Web Version Node.js - Hello World
21. Web - Router Version Node.js - Hello World
22. Node.js - I will call you back
23. Node.js - When, then
24. Serial independent Runs a series of functions one after the previous function completed Serial dependent Runs a series of functions passing previous results into next function Parallel fashion Runs a series of function in parallel Queue Runs a series of function in parallel up to desired concurrency Library Choices Async, Groupie, Step, Q, etc. Node.js - Flow libraries
25. Module - mymodule.js Node.js - Modules Client mymodule_client.js
26. Node.js - Modules require(‘mylib’) - Lookup order 1. package.json -> ./lib/mylib.js 2. index.js 3. index.node package.json
27. • console • log4js • Winston • GELF - Graylog Extended Log Format • Windows Event Log ... Node.js - Logging
28. $ npm install node-inspector $ node --debug-brk myapp.js $ node --debug myapp.js debugger listening on port 5858 $ node-inspector visit http://0.0.0.0:8080/debug?port=5858 to start debugging Debuggers WebKit based: Chrome Eclipse V8 Debugger Plugin, JetBrains WebStorm Other Tools v8-profiler, node-profiler nodetime.com Node.js - Debugging
29. Node.js - Inspector
30. Node.js - Debugging
31. Database Drivers MS SQL, MongoDB, PostgreSQL, MySQL, Oracle, SQLite, Redis, CouchDB, Hive, Riak, Cassandra ORMs sequelize, persist, LazyBoy, Model, jugglingdb, node-orm Transactions, Connection Pooling node-mysql-queues Node.js - DB / ORM
32. • Derby • Express • Flatiron • Meteor • Mojito • Tower ... Browserify - Node to Browser conversion Node.js - Web frameworks
33. • assert - built in • API Easy • Cucumber • httpmock, nock, mockery • NodeUnit • Soda ... Node.js - Testing frameworks
34. Node.js - Scaling out
35. Node.js - Scaling out *Credit: blog.evantahler.com
36. • Reuse existing JavaScript skill and code • Low resource usage • Performant VM (Google’s V8) • Active Community, Lots of resources • Package Manager • Enforces Async across • Quick Prototyping • Growing Industry support Node.js - Wrapping up
37. Questions ? Ovidiu Dimulescu @odimulescu speakerdeck.com/odimulescu