Eventcache

Who Kevin van Zonneveld t: @kvz e: kvz@php.net • cake: Learned from @felixge while working on http://phpjs.org Now building http://true.nl backend & admin in it • like: Reusable code & to Automate everything • startup: http://transloadit.com

What Eventcache Cache invalidation for the lazy coder

What What I use it for • Caching model data • Caching slow functions • Auto-Purging when an involved model saves / deletes

What Features • Invalidation Obviously • Doesn’t care about your PHP Framework I use CakePHP, but it’s not tied to that • “Magic function-wrapper” Allows for easy integration in your app.. I’ll show you in a minute! • Easy access EventCache::read(); // like Cake’s Cache::read(); • Speed Eventcache additionally uses inside-process memory This way the cache backend is only hit once per key per process • Supports multiple backends Apc, File, Memcache, Redis

Why #1 Why Caching

Why Simple

Why fastness == pretty awesome Cache adds speed without dropping a sweat

Why #2 Why Eventcache (I already use CakePHP/Custom caching)

Why Well

Why • Caching is easy • Invalidation is hard “There are only 2 hard problems in Computer Science: Cache invalidation, Naming things, Off-by-one errors”

Why Eventcache solves 2 of those problems: • Cache invalidation - Sorry, you are on your own with Naming & Off-by-one errors

How When you store a key • Also register what events will trigger it’s removal • Optionally specify other conditions that have to be met e.g.: parent model’s timestamp, customer_id • Eventcache takes care of invalidation

How The Code

How Initialize Do a vendor import in your bootstrap Optionally conﬁg:

How The normal ﬂow ttl didn’t purge nickname. you didn’t purge nickname. User->afterSave did

How Tie in with your app Fair enough, Eventcache needs to know about your events ..but that’s all there is to it

How Magic function-wrapper Add caching to an existing function with minimal effort -before- just some CPU intensive function

How Magic function-wrapper Add caching to an existing function with minimal effort -after- By adding 4 lines of code, the function is now cached

How More options

How What’s needed • More ﬁne-grained events You could do this yourself, but it would be nice if Eventcache supported events with arguments so you never purge more than needed • Adapters Currently, the APC adapter has some issues • Your tender, love & care Exposing to more programmers & environments to will surface bugs & feature requests to make it perfect

Where Here: • Fork http://github.com/kvz/eventcache • Follow http://twitter.com/kvz • Subscribe http://kevin.vanzonneveld.net • Mail kvz@php.net • Check http://transloadit.com

Questions?

Thank you!

Eventcache

by Kevin van Zonneveld on Oct 22, 2010

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Eventcache — Presentation Transcript