lessless

• How to effectively compose your business logic
• Slim your aggregates with Event Sourcing!
• Architecture Weekly Webinar #8 - Slim down your aggregates!
• Straightforward Event Sourcing with TypeScript and NodeJS
• Process Managers Made Simple - Chris Condron - EventSourcing 2021
• Architecture Weekly Wbinar #3 - Implementing Distributed Processes
• Saga and Process Manager - distributed processes in practice
• [Event-driven distributed processes by example](https://event-driven.io/en/event_driven_distributed_processes_by_exam

jwilger

This code is extracted from one of my private projects as an example of how to implement encryption of PII in event streams using two keys: a master key for each "data subject" that is stored in Vault and never transported to the systems that process the PII, and a key unique to each event that is stored (itself encrypted) with the event.

To be clear, the key that is stored with the data is encrypted by another key that is not stored with the data. The idea is that each "data subject" has an encryption key that is stored in Vault (external). When you encrypt data, the library will:

1. create a new AES 256 encryption key

coco98

provider "aws" {
  region     = "${var.region}"
}
### VPC

# Fetch AZs in the current region
data "aws_availability_zones" "available" {}

resource "aws_vpc" "datastore" {
  cidr_block = "172.17.0.0/16"

slashdotdash

Commanded middleware for command enrichment

Usage

Add the EnrichCommand middleware to your command router:

defmodule MyApp.Router do
  use Commanded.Commands.Router
 

branneman

// FP Lenses
const lens = get => set => ({ get, set });
const view = lens => obj => lens.get(obj);
const set = lens => val => obj => lens.set(val)(obj);
const over = lens => fn => obj => set(lens)(fn(view(lens)(obj)))(obj);
const lensProp = key => lens(prop(key))(assoc(key));

louthy

//
// See https://github.com/louthy/language-ext
// 

using System;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using LanguageExt;
using static LanguageExt.Prelude;

swlaschin

Functional Track talks from NDC Oslo 2017

Also, here is the list of all videos from NDC Oslo 2017:

• YouTube
• Vimeo

Wednesday 2017-06-14

swlaschin

(*
Example of domain-driven design for Checkers
Rules from here: https://www.itsyourturn.com/t_helptopic2030.html

A SERIES OF SCRATCH DESIGNS
*)

// As we go through the rules, and learn things, we create a series of designs

module Version1 =

bitwalker

defmodule Config do
  @moduledoc """
  This module handles fetching values from the config with some additional niceties
  """

  @doc """
  Fetches a value from the config, or from the environment if {:system, "VAR"}
  is provided.

  An optional default value can be provided if desired.

jboner

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: