Off the Rails(Madeleine on Rails)

AndrzejKrzywda.com

Not even a plugin yet.

Work in progress....

Started on Saturday at 2pmFinished at 3.30am

Demo the sample app.

Uses Madeleine.

What is Madeleine?

Imagine a world without relational databases

No ORM!

You operate on objects that live in memory.

Extremely fast!

Yes, you have to have enough RAM.

Sometimes your objects are serialized to a file.

Changes between snapshots are serialized as

‘command’ objects.

The whole concept is called “Prevalence”.

Prevayler is a Java implementation of this

concept.

Madeleine is a Ruby implementation of this

concept.

Remember Instiki?

Created by DHH, the first versions were using

Madeleine.

SnapshotsCommandsRoot object

Automatic creation of command objects.

How to apply it to Rails?

Single process only

config/initializers/madeleine.rb

Reads from snapshotStarts the AppService

Starts a “snapshotting” thread.(saves the files to db/madeleine/)

Add ApplicationController.app method

app/controllers/tasks_controller.rb

Communication with the app.rb

Enable classes caching (even in development)

Otherwise you loose everything on the next request.

How to deal with “schema” changes?

Object migrations.

Summary

It seems to work.a VERY different way of thinking

Pure objectsA plugin?

Thanks!