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CQRS Is an Anti-Pattern for DDD

Are you interested in new ways to build better software systems? If you work with distributed systems or build any kind of web application, you most likely have heard of the new trends like using Domain-Driven Design with Event-Sourcing and Command Query Responsibility Segregation (CQRS). Well, they are not exactly brand new. However, they are now becoming increasingly popular.

nip.io/

Dead simple wildcard DNS for any IP Address

Stop editing your /etc/hosts file with custom hostname and IP address mappings.

The Tighten Test: 12 Steps to a Better Team

Twenty years ago today, Joel Spolsky (who later co-founded Stack Overflow) published The Joel Test: 12 Steps to Better Code listing 12 metrics for rating the quality of a software development team. The premise is simple: you get 1 point for each “yes” answer, for a total score of up to 12 points.

Architecture decision records, also known as ADRs, are a great way to document how and why a decision was reached within a codebase. We’ve started to adopt them within the mobile team here at GitHub, documenting decisions that affect the iOS codebase and Android codebase, as well as decisions that affect both mobile clients.

ADRs are not the most common within open source codebases, but have gained more popularity since ~2017 within long-lived, “evolutionary” codebases like those in more enterprise-y settings.

So why write an ADR? Why spend time documenting something when a decision has already been made?

https://free-for.dev/

This is a list of software (SaaS, PaaS, IaaS, etc.) and other offerings that have free tiers for developers.

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Mocking/stubbing the current Date in Jest tests

This post goes through multiple approaches to mocking, stubbing and spying on the date constructor using Jest.

Don't get stuck

A history about the importance of know your time and to not get stuck.

For this special history guide, we are going to take a trip back in time to see where the seed of Linux was planted — namely via the Unix systems of the early 1970s and how it has progressed through the modern day. Though most are completely unaware of the enormous impact that Unix-like operating systems have planted on our society, understanding its storied history can allow us to realize why the Unix model has lived on far longer and become more successful than any other operating system architecture (and philosophy) in existence.

tmpmail - A temporary email right from your terminal

tmpmail is a command line utility that allows you to create a temporary email address and receive emails to the temporary email address. It uses 1secmail's API to receive the emails.

EXPLAIN docs

After a lot of time looking at query plans, we’re still coming across new operation types, fields, and terminology. Many of these terms were tricky to look up and understand, so we decided to share descriptions and useful links for many of the most common in a glossary.

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Introducing the MDN Web Docs Front-end developer learning pathway

The MDN Web Docs Learning Area (LA) was first launched in 2015, with the aim of providing a useful counterpart to the regular MDN reference and guide material. MDN had traditionally been aimed at web professionals, but we were getting regular feedback that a lot of our audience found MDN too difficult to understand, and that it lacked coverage of basic topics.
https://developer.mozilla.org/en-US/docs/Learn

SQL Optimizations in PostgreSQL: IN vs EXISTS vs ANY/ALL vs JOIN

This is one of the most common questions asked by developers who write SQL queries against the PostgreSQL database. There are multiple ways in which a sub select or lookup can be framed in a SQL statement. PostgreSQL optimizer is very smart at optimizing queries, and many of the queries can be rewritten/transformed for better performance.

Expose

Expose is a beautiful, open source, tunnel application that allows you to share your local websites with others via the internet.

Combining event sourcing and stateful systems

As Brent stated: In this two-part series, my colleague Freek and I will discuss the architecture of a project we're working on. We will share our insights and answers to problems we encountered along the way. This part will be about the design of the system, while Freek's part will look at the concrete implementation.

Let's set the scene.

Does scrum ruin great engineers or are you doing it wrong?

A question on Stack Overflow’s Software Engineering site caught our attention recently. It tries to come to terms with the impact of scrum on developers' ability to do a great job. The claim is a bold one: Scrum is turning good developers into average ones. Could that be true?

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Auto-restart a crashed service in systemd

Systemd allows you to configure a service so that it automatically restarts in case it’s crashed.

My Personal Best Practices For Using LaunchDarkly Feature Flags

The Most-Neglected Postgres Feature?

log_line_prefix should be the most-neglected postgres feature. Overused and mis-configured. The author talk about his finding, the great use and some tips for log_line_prefix configuration. This feature is very powerful on PostgreSQL.

Logical Replication Between PostgreSQL and MongoDB

A decoder plugin to enable logical replication from a PostgreSQL (as publisher) to MongoDB (as subscriber).

Awesome-Compose: Application samples for project development kickoff

A curated list of Docker Compose samples.

These samples provide a starting point for how to integrate different services using a Compose file and to manage their deployment with Docker Compose.

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Upgrading Postgres major versions using Logical Replication

Arch Fun Statistics

Everyday Hacks for Docker

In this post, I’ve decided to share with you some useful commands and tools I frequently use when working with awesome Docker technology. There is no particular order or “coolness level” for every “hack.” I will simply present the use case and how the specific command or tool has helped me with my work. Read these great hacks and make sure to check out the great hack of all – Codefresh –  the best CI for Docker out there.

https://codefresh.io/docker-tutorial/not-ignore-dockerignore-2/

A video course Introduction to CQRS and Event Sourcing

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Intro Guide to Dockerfile Best Practices

There are over one million Dockerfiles on GitHub today, but not all Dockerfiles are created equally. Efficiency is critical, and this blog series will cover five areas for Dockerfile best practices to help you write better Dockerfiles: incremental build time, image size, maintainability, security and repeatability. If you’re just beginning with Docker, this first blog post is for you! The next posts in the series will be more advanced.

The case against the ifsetor function

how to traverse nested array structures with potentially non-existing keys without throwing notices

Laravel Beyond CRUD

Proposal for thinking Laravel applications using DDD approach. A blog series for PHP developers working on larger-than-average Laravel projects.

Designing Your First App in Kubernetes, Part 1: Getting Started

Kubernetes’s gravity as the container orchestrator of choice continues to grow, and for good reason: It has the broadest capabilities of any container orchestrator available today. But all that power comes with a price; jumping into the cockpit of a state-of-the-art jet puts a lot of power under you, but how to actually fly the thing is not obvious.

How to run short ALTER TABLE without long locking concurrent queries

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Craftsmen know their tools

When programmers call themselves craftsmen or artisans, I can agree that we are. At the same time though, some of these programmers underestimate what craftsmanship actually means.

We Programmers

The good, the bad and the ugly.

History and effective use of Vim

This article is based on historical research and on simply reading the Vim user manual cover to cover. Hopefully these notes will help you (re?)discover core functionality of the editor, so you can abandon pre-packaged vimrc files and use plugins more thoughtfully.

Google spent 10 years researching what makes the 'perfect' manager — here at the top 10 traits they found

59 Linux Networking commands and scripts

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Snyk

Use Open Source. Stay Secure.

A developer-first solution that automates finding & fixing vulnerabilities in your dependencies

Reading List - by Mathias Verraes

Code Reviews and Blame Culture

A common belief is that gated reviews lead to blaming individuals. The opposite can be true.

 

How to Write a Git Commit Message

Why good commit messages matter

Better Commits with Static Review

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Good Engineering Practices while Working Solo

How Much maintenance_work_mem Do I Need?

While I generally like PostgreSQL's documentation quite a bit, there are some areas where it is not nearly specific enough for users to understand what they need to do. The documentation for maintenance_work_mem is one of those places. It says, and I quote, "Larger settings might improve performance for vacuuming and for restoring database dumps," but that isn't really very much help, because if it might improve performance, it also might not improve performance, and you might like to know which is the case before deciding to raise the value, so that you don't waste memory. TL;DR: Try maintenance_work_mem = 1GB. Read on for more specific advice.

JSONPlaceholder

Fake Online REST API for Testing and Prototyping

A Beginner’s Guide to the True Order of SQL Operations

The SQL language is very intuitive. Until it isn’t. A guide to understanding the order of a SELECT operation.

The state of open source security - 2019

Snyk is an incredible tool for package security. And they released a state of open source security, talking about open source adoption and package, images and code vulnerabilites. We are talking about maven, npm, pypi, docker, etc.

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Cloud Computing without Containers

Cloudflare has a cloud computing platform called Workers. Unlike essentially every other cloud computing platform I know of, it doesn’t use containers or virtual machines. We believe that is the future of Serverless and cloud computing in general, and I’ll try to convince you why.

HTTP-over-QUIC will officially become HTTP/3

The protocol that's been called HTTP-over-QUIC for quite some time has now changed name and will officially become HTTP/3. This was triggered by this original suggestion by Mark Nottingham.

The QUIC Working Group in the IETF works on creating the QUIC transport protocol. QUIC is a TCP replacement done over UDP. Originally, QUIC was started as an effort by Google and then more of a "HTTP/2-encrypted-over-UDP" protocol.

Announcing SSH Access through Cloudflare

A way to replace the old (clunky) VPN by SSH access. Leverage access without losing security.

The Memory Resource Triad

Some more information about the three resources that affect query performance: cpu, memory, and storage.

psql: A New Edit

Have you ever found yourself in the middle of a long statement in psql and wanted to pull up your favorite editor? Now, you can, using the same shortcut of control-x control-e that you would in bash!