Henry.He hekailiang

Setup macOS

I'm in a hospital in Spain and my MacBook was stolen.

Now I bought a new one and need to configure it. I have an AirPort Time Capsule that backs up everything using Time Machine, but I don't want all the crap I had in the old one. So let's get our hands dirty!

1. Update OS to latest version

Rough Notes about CQRS and ES

Once upon a time…

I once took notes (almost sentence by sentence with not much editing) about the architectural design concepts - Command and Query Responsibility Segregation (CQRS) and Event Sourcing (ES) - from a presentation of Greg Young and published it as a gist (with the times when a given sentence was heard).

I then found other summaries of the talk and the gist has since been growing up. See the revisions to know the changes and where they came from (aka the sources).

It seems inevitable to throw Domain Driven Design (DDD) in to the mix.

Extremely bare example of Spray routing authentication using session cookies and XSRF tokens

This code was quickly ripped out of an active project to serve as an example. It will not compile in any way!

Any questions? Add them to the comments!

Notes

the application uses a version of the cake pattern to compose the Spray routing application together from various traits
a lot of those traits should be pretty self-explaining based on their name but if requested I can paste them into this Gist

	#!/bin/bash
	sudo apt-get update
	sudo apt-get -y install linux-image-extra-$(uname -r)
	sudo sh -c "wget -qO- https://get.docker.io/gpg \| apt-key add -"
	sudo sh -c "echo deb http://get.docker.io/ubuntu docker main\ > /etc/apt/sources.list.d/docker.list"
	sudo apt-get update
	sudo apt-get -y install lxc-docker

	import spray.routing.{AuthenticationFailedRejection, HttpService}
	import akka.actor.{Props, ActorSystem, Actor, ActorRefFactory}
	import spray.routing.authentication._
	import scala.concurrent.Promise
	import spray.routing.AuthenticationFailedRejection.CredentialsMissing
	import akka.io.IO
	import spray.can.Http

	class MinifiedService extends Actor with HttpService {
	val identity_cookie_name = "session_id"

	import akka.actor.Actor
	import akka.actor.ActorSystem
	import akka.agent.Agent
	import com.typesafe.config.ConfigFactory
	import akka.event.Logging
	import akka.actor.Props
	import kafka.utils.Utils
	import java.nio.ByteBuffer