Architecture

Decoupling the Client and Server with Hypermedia

This is part two in a series about hypermedia and REST. You don't need to read the previous post to follow this one, but if...more.

Duration vs. Concurrency in AWS Lambda

[Updated 2018-04-16] I was corrected on Twitter about how Event (async) invocation throttling behaves, and have updated this post accordingly in several places marked like...more.

Basic Web App Architecture 101

Okay, so you want to build a web app. Let's use a very basic web application for instance. The user story is this: The user...more.

Turning Up The Good On REST APIs

This is part one in a series about hypermedia and REST. If you like this and want to read more, check out Part 2: Decoupling...more.

Two Design Patterns You're Probably Already Using

I came into this field from a very non-technical background. And when I say very non-technical, I mean that I was an elementary fine arts...more.

What Is Assumed When Deferring Database Decisions?

I first heard about the idea of deferring database decisions from Bob Martin, who pioneered the concept while working on FitNesse and has expanded on...more.

Concurrency Control Strategies for Secret Agents

In the 1963 movie "Dr. No," the first in the James Bond series, Bond travels to Jamaica for a case, and he knows that his...more.

Decomposing Asynchronous Workers in Ruby

I'm a proponent of building small, composable pieces over one large piece that does many things. The large piece usually works well, but it eliminates...more.

Loose Coupling in Go lang

Go lang offers a wide range of features that help us achieve loosely coupled program designs. Coupling refers to the direct knowledge that an element...more.

Organizing Your Clojure Environment and Logs with Leiningen

Coming from a Rails environment, one of the things I took for granted was a nice logging setup in which all logs were written to...more.

Mistaking Encapsulation for Abstraction

"Abstract" is a commonly used word in software. I hear it a few times every day. "Can we make an abstraction around this?" "Let's move...more.

Take Pride in Your Legacy (Code)

A developer joining a project, unless the project is starting a completely new application, will be working with dreaded “legacy code.” The process of becoming...more.

Pattern Language of Thieves

What do architects (designers of buildings), software developers, and thieves have in common? They each have a pattern language. I was watching “Ocean’s Twelve” recently...more.

Leaky Libraries: How To Assess The Risk Of Dependencies

ben voss
26 May 2014
Tools
Architecture

A library is a package of code. Usually a library is small. It is focused on solving a single problem. A library is created when...more.

The Single Responsibility Principle

uncle bob
08 May 2014
Architecture

In 1972 David L. Parnas published a classic paper entitled On the Criteria To Be Used in Decomposing Systems into Modules. It appeared in the...more.

Modular JavaScript

JavaScript is a complicated language. One of the difficult areas is scope. We can think of scope as the world a particular line of code...more.

Conditionals Aren’t Evil, Unless You Duplicate Them

We Hate If Statements Many of us have been taught that, in OOP, most of a program’s “if” statements can be replaced by polymorphism. We...more.

Strive for Simplicity

A few weeks ago I had an opportunity to pair with Uncle Bob. We were going to pair on a message queue convenience wrapper I...more.

The Repository Pattern

A recurring theme on the 8th Light blog is decoupling your applications from the implementation of details. A detail can be anything from UI elements...more.

Servers in Source Control

8th Light has accumulated a lot of servers, the cloud kind, over the years. Each one configured by the team that was building our internally...more.

Implementing and Testing the Singleton Pattern in Ruby

What is a Singleton Object? The GoF identifies a singleton as a way to "ensure a class only has one instance, and provide a global...more.

Owning Your Dependencies

Dependencies are nearly unavoidable for non-trivial software projects. These can be large dependencies, such as web frameworks and databases, or smaller decisions, such as pagination...more.

Explicit Collections

Don't extract that method yet! In programming, we tend to work with collections of objects quite often. For example, we may need to check to...more.

The Clean Architecture

Over the last several years we’ve seen a whole range of ideas regarding the architecture of systems. These include: Hexagonal Architecture (a.k.a. Ports and Adapters)...more.

Thinking Differently About the Single Responsibility Principle

When the Single Responsibility Principle is taught among developers, one aspect - the responsibility - is harped on the most. But what counts as a...more.

NO DB

In the United States, in 1920, the manufacture, sale, and importation of alcoholic beverages was prohibited by a constitutional amendment. That amendment was repealed thirteen...more.

Service Oriented Agony

I sat down with a group of developers today to do a retrospective on a project. They told me that project management has been complaining...more.

Clean Architecture

uncle bob
22 Nov 2011
Architecture

In the weeks since I started talking about the need to clean up our architecture, I’ve noticed a surprising resistance to the idea. Apparently the...more.

Screaming Architecture

uncle bob
30 Sep 2011
Architecture

Imagine that you are looking at the blueprints of a building. This document, prepared by an architect, tells you the plans for the building. What...more.

Architecture

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