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How to break a Monolith into Microservices

What to decouple and when As monolithic systems become too large to deal with, many enterprises are drawn to breaking them down into the microservices architectural style. It is a worthwhile journey, but not an easy one. We've learned that to do this well, we need to start with a simple service, but then draw out services that are based on vertical capabilities that are important to the business a

niseissa 2020/10/21

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Patterns for Managing Source Code Branches

Modern source-control systems provide powerful tools that make it easy to create branches in source code. But eventually these branches have to be merged back together, and many teams spend an inordinate amount of time coping with their tangled thicket of branches. There are several patterns that can allow teams to use branching effectively, concentrating around integrating the work of multiple de

niseissa 2020/04/21

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Announcing the Second Edition of "Refactoring"

For the past two years, I've been working on a second edition of my book "Refactoring". Here I have details about the new edition and some memos describing my thoughts in the last months of this project. The book is now available and you can buy it from inform it (the web presence of the publisher), Amazon, or your favorite book seller. Purchasing the book gives you access to the canonical web edit

niseissa 2018/08/25

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The Practical Test Pyramid

The "Test Pyramid" is a metaphor that tells us to group software tests into buckets of different granularity. It also gives an idea of how many tests we should have in each of these groups. Although the concept of the Test Pyramid has been around for a while, teams still struggle to put it into practice properly. This article revisits the original concept of the Test Pyramid and shows how you can

niseissa 2018/04/04

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Testing Strategies in a Microservice Architecture

There has been a shift in service based architectures over the last few years towards smaller, more focussed "micro" services. There are many benefits with this approach such as the ability to independently deploy, scale and maintain each component and parallelize development across multiple teams. However, once these additional network partitions have been introduced, the testing strategies that