wsargent

https://docs.google.com/a/typesafe.com/presentation/d/1QBhMeRRq5Gs5UfgaqvZ_3-LaxC-fQviLbPi5O8fA71c/edit?usp=sharing

wsargent

package backend

import akka.actor.{Actor, ActorRef, Cancellable}

import scala.concurrent.duration.FiniteDuration
import scala.util.control.NoStackTrace

private case class SchedulerException(msg: String) extends akka.AkkaException(msg) with NoStackTrace

/**

wsargent

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"

wsargent

#!/bin/bash

export PW=`cat password`

# Create a JKS keystore that trusts the example CA, with the default password.  
# This is used by the client.
keytool -import -v \
  -alias exampleca \
  -file exampleca.crt \
  -keypass:env PW \

wsargent

#!/bin/bash

export PW=`cat password`

# Create a self signed key pair root CA certificate.
keytool -genkeypair -v \
  -alias exampleca \
  -dname "CN=exampleCA, OU=Example Org, O=Example Company, L=San Francisco, ST=California, C=US" \
  -keystore exampleca.jks \
  -keypass:env PW \

wsargent

#!/bin/bash

export PW=`pwgen -Bs 10 1`

echo "$PW" > password

# Create a self signed certificate & private key to create a root certificate authority.
keytool -genkeypair -v \
  -alias clientCA \
  -keystore client.jks \

wsargent

#!/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";

wsargent

Keybase proof

I hereby claim:

• I am wsargent on github.
• I am will_sargent (https://keybase.io/will_sargent) on keybase.
• I have a public key whose fingerprint is CD69 70B7 2D00 E5BE 9A33 0EF3 C1E8 BF06 2BC6 C4B7

To claim this, I am signing this object:

wsargent

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",

wsargent

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)