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# To regenerate the test key and certificates

# Generate an RSA private key and convert it to PKCS8 wraped in PEM
openssl genrsa 2048 | openssl pkcs8 -topk8 -inform pem -outform pem -nocrypt -out rsa.key
# Generate a certificate signing request with the private key
openssl req -new -key rsa.key -out rsa.csr
# Sign request with private key
openssl x509 -req -days 10000 -in rsa.csr -signkey rsa.key -out rsa.crt

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Install Coursier

https://github.com/coursier/coursier#command-line-1

Add the following functions to your shell

Generate a read-only, personal access token for GitHub.

export GITHUB_TOKEN=XXXXXXX

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Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

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I use Play 2.5.6 with Scala and found several interesting modules but I think some basic and really useful features are still missing...

Here is my sample app where I do my tests :

• messages
• messages.fr
• index.scala.html
• I18nHelper.scala

I list here needed features (according to me) from the most needed to the least needed.

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Deploying Scala Play Framework Applications on AWS Beanstalk using Docker containers

By Mohammad Al Amin - Intern at IncludeSec

Overview

1. Pre-requisites
2. Run your app in a local container
3. Stage your app
4. Setup AWS EB CLI
5. Deploy

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fooapp@srv:~$ cat app/env/PLAY_OPTS 

export DATABASE_URL="jdbc:postgresql://127.0.0.1/foobar"

# We could wire a different configuration file here
# or set up a different database on the fly
export PLAY_OPTS="-DapplyEvolutions.default=true -DapplyDownEvolutions.default=true -Ddb.default.url="$DATABASE_URL" -Ddb.default.user=fooapp -Ddb.default.password=fooapppw -Ddb.default.driver=org.postgresql.Driver"

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#!/bin/bash

REMOTE=play@SERVER_IP
REMOTE_APP=/home/play/PROJECT_NAME/

sbt stage || exit 1;
ssh $REMOTE "cd $REMOTE_APP; ./stop.sh";
rsync -va target/ $REMOTE:$REMOTE_APP/target
ssh $REMOTE "cd $REMOTE_APP; ./start.sh";

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Useful Scalac Flags

So, there have been some discussions and angry tweets recently about irritating Scala "features" (like value discarding and auto-tupling) that can actually be turned off by selecting the right compiler flag in conjunction with -Xfatal-warnings. I highly recommend a set of options something like those below.

scalacOptions ++= Seq(
  "-deprecation",           
  "-encoding", "UTF-8",       // yes, this is 2 args
  "-feature",                
 "-language:existentials",

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Setup vagrant vm

vagrant box add precise64 http://files.vagrantup.com/precise64.box
vagrant init precise64
sed -i '.bak' 's/# config.vm.network :private_network/config.vm.network :private_network/' Vagrantfile
vagrant up
vagrant ssh

Install base software and apache (to have something to proxy)