Video and slides synchronized, mp3 and slide download available at http://bit.ly/YL91yo. Daniel Erickson addresses the problems appearing in mixing MVC and real time frameworks in web applications and how Geddy transparently solves these issues. Filmed at qconsf.com. Daniel Erickson has spent the better part of the last 8 years evolving with the web. He currently works for Yammer as a Senior JavaScript Engineer. He is a core contributor for Geddy, one of the leading web frameworks for Node.js. He has been working with Node since it's early days back in 2010, and has worked with a number of companies to help them write well organized Node applications.

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RT-MVC
Real Time Model/View/Controller Applications
/Daniel Erickson qConSF

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WHAT'S GOING TO
WIN
REAL TIME OR MVC?

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REAL TIME?

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YEAH!
'CUZ SOME PEOPLE SAY:
MVC doesn't scale well
MVC is dead

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BUT MVC IS HERE TO STAY
Gives teams structure to get things done
Allows new people to jump into your project
Easy to get started with

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WHAT'S GOING TO
WIN
REAL TIME OR MVC?

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MVC?

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TOTALLY!
'CUZ PEOPLE THINK:
Real Time is hard
Maintain a new stack
Event Machine and Tornado suck
Front end code is messy

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BUT REAL TIME IS ALSO HERE TO STAY
Use WebSockets to get updates on the front end
Instant feedback for your users
Works really well on mobile

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WHAT'S GOING TO
WIN
REAL TIME OR MVC?

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BOTH!

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REAL TIME AND MVC
ACTUALLY MIX PRETTY WELL

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YOU CAN:
Define your model once and use it all over the place
use your templates on both sides of HTTP
Mirror events from the backend to the frontend
instance created
instace updated
instance removed

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HOW WE SOLVED THE
REAL TIME PROBLEM
WITH GEDDY

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WAIT,
WHAT'S GEDDY?

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THE ORIGINAL MVC
FRAMEWORK FOR NODE.JS
Very familiar if you know Rails
Awesome noSQL and SQL ORM
Many different templating languages

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AND NOW IT
SUPPORTS REAL TIME
RIGHT OUT OF THE BOX

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SO LETS MAKE AN MVC APP
THAT SUPPORTS REAL TIME

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GENERATE AN APP
$ npm install -g geddy
$ geddy app -rt demo
$ cd demo
$ geddy scaffold -rt thing title description
$ geddy

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TEST IT OUT
Open up
and
http://localhost:4000/things
http://localhost:4000/things/add

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FOR THOSE OF YOU FOLLOWING
ALONG AT HOME
1. add a thing
2. watch it show up in the other window
3. update the thing
4. watch it change in the other window
5. remove the item
6. watch it get removed from the other window.

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WHAT JUST HAPPENED?
geddy app -rt demo
Generated a demoapp with realtime enabled

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WHAT JUST HAPPENED?
geddy scaffold -rt thing ...
Generated a thingresource
thingmodel
made that model available on the front end
thingscontroller
routes
views that subscribe to the realtime events

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HOW DOES IT WORK?
ON THE SERVER SIDE:
geddy sees the realtimeflag in your config file
copies your models over to a public js file
sets up listeners for each model's lifecycle events
proxies those lifecycle events to socket.io

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HOW DOES IT WORK?
ON THE CLIENT SIDE:
registers listeners for all model related events
proxies them to the appropriate models
scaffolds some code that hooks into real time events

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THATS PRETTY COOL,
BUT IS IT EASY TO CHANGE?
modify your model once and you get it everywhere
emit custom events on your models
all generated code can be modified

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WHAT'S NEXT ON THE ROADMAP?
Create an AJAX adapter for the front-end ORM
Real time queries
Per instance real time events
A better way to share templates

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WANT TO HELP OUT?
CHECK OUT GEDDY AT
Join the mailinglist
open bugs on github
send us pull requests
http://geddyjs.org

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ANY QUESTIONS?

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