Node js introduction
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Node.js is a server-side JavaScript platform built on Google's V8 engine. It is non-blocking and asynchronous, making it suitable for data-intensive real-time applications. The document discusses how to install Node.js and its dependencies on Ubuntu, introduces key Node.js concepts like events and the event loop, and provides examples of popular Node.js packages and use cases.
Node js introduction
- 1. NodeJS IntroductionWhat is Node? (Teaser)How to install/set-up and examples
- 2. IntroductionIntroduction to Node JSHow to Install/ToolsBasic Node concepts (teaser)Demo
- 3. Nodejs IntroductionNodeJS is built on Google’s V8 Javascript engineServer-side non blocking asynchronous JSPerfect for “blood” of Web 2.0 apps (streams, comet, AJAX, etc) and scale
- 4. How to Install (VM) (1/5)Download Ubuntu TurnKey from http://www.turnkeylinux.org/coreDownload the free Vmware player from http://www.vmware.com/download/player/thankyou.html (or use VMWare Workstation)Start the Turnkey Virtual Appliance and follow instruction to set-up root password and update security.Note IP@ to connect to with SSH
- 5. How to Install (SSH) (2/5)Get your favorite SSH tool (duh, Putty!)http://www.chiark.greenend.org.uk/~sgtatham/putty/download.htmlSet-up your SSH connection as indicated left Approve to the RSA key as shown right
- 6. How to Install (Misc.) (3/5)Get Filezilla http://filezilla-project.org/ if you want to transfer through SSH with your favorite editorI use NotePad++ http://notepad-plus-plus.org/with an NppFTP extension http://sourceforge.net/projects/nppftp/ (not automated but easier to remember)
- 7. How to Install (Git) (4/5)Install Compile toolsapt-get install gccapt-get install g++apt-get install makeInstall Git (would be a good L&L. Volunteers?)apt-get install git-coreGit the node repo: (alternative is to download & install the TAR’ed version from nodejs but what’s the fun ?wget http://nodejs.org/dist/node-v0.4.12.tar.gz)gitclone git://github.com/joyent/node.git Make sure to use the latest stable version(As of 10/3/2011, I recommend 0.4.11. 0.4.12 seems to be the latest though) cd nodegitcheckout v0.4.11 Configure/Make./configureMakeMake InstallYou are all set:cd benchmark/node v8_bench.js
- 8. How to Install (NPM) (5/5)Get CURL apt-get install curlInstall NPMcurl http://npmjs.org/install.sh | shYou are all setnpm
- 9. What is NPM?NPM is a Node Dependency manager (better than APT)Get a package, and all dependent package will automatically be installed
- 10. Good Node PackagesConnectThe middleware framework for node: Logging, Cookies, Sessions, Cache, response time …ExpressBuilt on Connect. Essentially all the libraries that people are used to when doing server side development (such asp.net) (Routing, content negotiations, configurations, etc) Socket.io“Socket.IO aims to make realtime apps possible in every browser and mobile device, blurring the differences between the different transport mechanisms. It's care-free realtime 100% in JavaScript.” (essentially synthetically do “sockets” in HTTP)TwitternodeA complete node twitter client API wrapper supporting full JSON streams.
- 11. Why on earth would I want do do server-side JavaScript?Because geeks like to play with new thingsBecause you like the open/flexible/powerful nature of a language such as javascriptYou already do a lot of client-side javascriptYou need to “Web” scaleYou need to communicate with many other resources
- 12. You do many medium size payloads that could benefit from asynchronous processing
- 13. Many javascript developers and a growing established open-source javascriptlibraries and code repositoryMore importantly :It’s cool: And, it hasn’t jumped the shark (yet?):Give me the geek versionPerformance rocks on many connections, resources utilizationNo concepts of threads, which is an extremely wasteful idea when trying to server many (thousands) requestsStreaming (comets) & big data payloads (big .csv reports scaled to thousands) do not scale on thread-based serversNon blocking calls can handle way more requests/seconds and use less memorySource: http://blog.webfaction.com/a-little-holiday-present
- 14. So what have we learnt so far?Node.JS is using non-blocking, event-based (asynchronous) engine to deliver a much more scalable serverJavascript is a really natural fit for event-based programming
- 15. Events in Node.jsRelies on event-loop systemShould be familiar for all developers (.net …) who used events & delegates or others who are familiar with concept of callbacks.Javascript is a really natural fit for event-based programmingBuilds on anonymous functions (lamba*) * Tom will do a L&L on advanced JS (closure, Lambda) concepts shortly
- 16. Blocking vs Non Blocking
- 18. NodeJS Full Demo
- 19. ReferencesWeb faction bloghttp://blog.webfaction.com/a-little-holiday-presentUnderstanding event loops and writing great code for node.jshttp://developer.yahoo.com/blogs/ydn/posts/2010/10/understanding-the-event-loops-and-writing-great-code-for-node-js-part-1/A Not Very Short Introduction To node.jshttp://blog.jayway.com/2011/05/15/a-not-very-short-introduction-to-node-js/Comet with node.js and V8 (amix)http://www.slideshare.net/amix3k/comet-with-nodejs-and-v8Introduction to node.js (JacekBecela)http://www.slideshare.net/jacekbecela/introduction-to-nodejsNode.JS referenceshttp://nodejs.org/Bex Huff http://bexhuff.com/
Editor's Notes
- #4: - Lars Bak (SmallTalk, Java, now JS VM)