Kostya Golikov lazyval

Famous article and talk by J. Rainsburger http://blog.thecodewhisperer.com/permalink/integrated-tests-are-a-scam

Gary Bernhardt (from destroyallsoftware.com) has also created several good screencasts on isolated testing.

Auto-deploying built products to gh-pages with GitHub Actions

This is a set up for projects which want to check in only their source files, but have their gh-pages branch automatically updated with some compiled output every time they push.

A file below this one contains the steps for doing this with Travis CI. However, these days I recommend GitHub Actions, for the following reasons:

It is much easier and requires less steps, because you are already authenticated with GitHub, so you don't need to share secret keys across services like you do when coordinate Travis CI and GitHub.
It is free, with no quotas.
Anecdotally, builds are much faster with GitHub Actions than with Travis CI, especially in terms of time spent waiting for a builder.

How-to setup a simple git push deployment

These are my notes basically. At first i created this gist just as a reminder for myself. But feel free to use this for your project as a starting point. If you have questions you can find me on twitter @thomasf https://twitter.com/thomasf This is how i used it on a Debian Wheezy testing (https://www.debian.org/releases/testing/)

Discuss, ask questions, etc. here https://news.ycombinator.com/item?id=7445545

On the server (example.com)

Akka Cluster Implementation Notes

Slightly disorganized but reasonably complete notes on the algorithms, strategies and optimizations of the Akka Cluster implementation. Could use a lot more links and context etc., but was just written for my own understanding. Might be expanded later.

Links to papers and talks that have inspired the implementation can be found on the 10 last pages of this presentation.

Akka Gossip

Gossip state

This is the Gossip state representation:

	/*
	Copyright 2015 Viktor Klang

	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing, software

	import org.scalacheck.Prop.forAll
	import org.scalacheck.Properties

	object ShakespeareSpec extends Properties("Bubble") {

	def spell(words: List[String], mysticNumber: Int) =
	mysticNumber.toString +
	words.mkString + "toil" + "trouble"

	property("bubble") = forAll { (a: List[String], b: Int) =>

	import com.twitter.finagle.Http;
	import com.twitter.finagle.ListeningServer;
	import com.twitter.finagle.Service;
	import com.twitter.finagle.http.HttpMuxer;
	import com.twitter.util.Await;
	import com.twitter.util.Future;
	import java.net.InetSocketAddress;
	import static java.nio.charset.StandardCharsets.UTF_8;
	import static org.jboss.netty.buffer.ChannelBuffers.copiedBuffer;
	import org.jboss.netty.handler.codec.http.*;

	#
	# /etc/sysctl.conf - Configuration file for setting system variables
	# See /etc/sysctl.d/ for additional system variables.
	# See sysctl.conf (5) for information.
	#

	#kernel.domainname = example.com

	# Uncomment the following to stop low-level messages on console
	#kernel.printk = 3 4 1 3

	//==================================================================
	// SPARK INSTRUMENTATION
	//==================================================================

	import com.codahale.metrics.{MetricRegistry, Meter, Gauge}
	import org.apache.spark.{SparkEnv, Accumulator}
	import org.apache.spark.metrics.source.Source
	import org.joda.time.DateTime
	import scala.collection.mutable

	#!/usr/bin/env bash

	# Formatting constants
	BOLD=`tput bold`
	UNDERLINE_ON=`tput smul`
	UNDERLINE_OFF=`tput rmul`
	TEXT_BLACK=`tput setaf 0`
	TEXT_RED=`tput setaf 1`
	TEXT_GREEN=`tput setaf 2`
	TEXT_YELLOW=`tput setaf 3`