PERSISTENCE, DATA STRUCTURES, AND THESE THINGS THAT LIVE IN APP/MODELSJustin Litchfield @sototallysweet

PROBLEM SPACE

DB

App1 App2

DB

DataData Data

PROBLEM SPACE

DB

App1App2

DataData

DB

Persistence As A

Service

App3App4

DIAMETRIC HTTPS://GITHUB.COM/RELEVANCE/DIAMETRIC

Wrapper/ORM for Datomic

Datomic is a DB that stores “facts” about an entity

Facts have time stamps and other metadata

DIAMETRIC HTTPS://GITHUB.COM/RELEVANCE/DIAMETRIC

DATA STRUCTURES IN REAL “LIVE” APPS

TWITTER GEM HTTPS://GITHUB.COM/SFERIK/TWITTER

Uses lots of other cool gems

Worth reading

Great structure

244 Files (!!!)

FARADAY HTTPS://GITHUB.COM/LOSTISLAND/FARADAY

FARADAY HTTPS://GITHUB.COM/LOSTISLAND/FARADAY

HASHIE HTTPS://GITHUB.COM/INTRIDEA/HASHIE

Can quickly describe data structures

Provides things like validation, type coersion

But it just feels like a hash

HASHIE HTTPS://GITHUB.COM/INTRIDEA/HASHIE

HASHIE HTTPS://GITHUB.COM/INTRIDEA/HASHIE

HASHIE HTTPS://GITHUB.COM/INTRIDEA/HASHIE

ADAMANTIUM HTTPS://GITHUB.COM/DKUBB/ADAMANTIUM

“Makes objects immutable in a simple, unobtrusive way”

Performance problems?