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What are microservices?

Microservices - also known as the microservice architecture - is an architectural style that structures an application as a collection of services that are:

Services are typically organized around business capabilities. Each service is often owned by a single, small team.

Microservices enable fast flow

For a business to thrive in today鈥檚 volatile, uncertain, complex and ambiguous world, IT must deliver that software rapidly, frequently and reliably.

To do that for large complex applications you need the success triangle.

Design microservices using Assemblage

The key challenge when using microservices is designing a good service architecture.

If you get it wrong you risk creating a distributed monolith, which will slow down software delivery.

Assemblage is an architecture definition process for grouping subdomains/bounded contexts into services.

Dark energy and dark matter shape the architecture

Assemblage uses the dark energy and dark matter forces to shape the service architecture.

Dark energy forces encourage decomposition into smaller services. Dark matter forces resist decomposition.

The balance between these forces shapes the service architecture.

The pattern language is your guide

The microservices pattern language is your guide when designing an architecture: service collaboration, testing, deployment, common crosscutting concerns and more. It鈥檚 a collection of patterns that help you make decisions when designing and evolving an architecture.

Incrementally refactor a monolith to microservices

The monolithic architecture is not an anti-pattern. It鈥檚 a good choice for small teams and small projects.

But if you outgrow your monolithic architecture, you need to refactor it to services using the Strangler Fig pattern.


Note: tagging is work-in-process

DDD 聽 路聽 GitOps 聽 路聽 Microservices adoption 聽 路聽 ancient lore 聽 路聽 anti-patterns 聽 路聽 api gateway 聽 路聽 application api 聽 路聽 application architecture 聽 路聽 architecting 聽 路聽 architecture 聽 路聽 architecture documentation 聽 路聽 assemblage 聽 路聽 beer 聽 路聽 books 聽 路聽 build vs buy 聽 路聽 containers 聽 路聽 dark energy and dark matter 聽 路聽 deployment 聽 路聽 deployment pipeline 聽 路聽 design-time coupling 聽 路聽 developer experience 聽 路聽 development 聽 路聽 devops 聽 路聽 docker 聽 路聽 eventuate platform 聽 路聽 fast flow 聽 路聽 generative AI 聽 路聽 glossary 聽 路聽 health 聽 路聽 hexagonal architecture 聽 路聽 implementing commands 聽 路聽 implementing queries 聽 路聽 inter-service communication 聽 路聽 kubernetes 聽 路聽 loose coupling 聽 路聽 microservice architecture 聽 路聽 microservice chassis 聽 路聽 microservices adoption 聽 路聽 microservices rules 聽 路聽 microservicesio updates 聽 路聽 modular monolith 聽 路聽 multi-architecture docker images 聽 路聽 observability 聽 路聽 pattern 聽 路聽 refactoring to microservices 聽 路聽 resilience 聽 路聽 sagas 聽 路聽 security 聽 路聽 service api 聽 路聽 service architecture 聽 路聽 service blueprint 聽 路聽 service collaboration 聽 路聽 service design 聽 路聽 service discovery 聽 路聽 service granularity 聽 路聽 service template 聽 路聽 software delivery metrics 聽 路聽 success triangle 聽 路聽 survey 聽 路聽 tacos 聽 路聽 team topologies 聽 路聽 testing 聽 路聽 transaction management 聽 路聽 transactional messaging 聽 路聽 wardley mapping

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About is brought to you by Chris Richardson. Experienced software architect, author of POJOs in Action, the creator of the original, and the author of Microservices patterns.

New workshop: Architecting for fast, sustainable flow

Enabling DevOps and Team Topologies thru architecture

DevOps and Team topologies are vital for delivering the fast flow of changes that modern businesses need.

But they are insufficient. You also need an application architecture that supports fast, sustainable flow.

Learn more and register for my September 2024 online workshops....


I help organizations improve agility and competitiveness through better software architecture.

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LEARN about microservices

Chris offers numerous other resources for learning the microservice architecture.

Get the book: Microservices Patterns

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Example microservices applications

Want to see an example? Check out Chris Richardson's example applications. See code

Virtual bootcamp: Distributed data patterns in a microservice architecture

My virtual bootcamp, distributed data patterns in a microservice architecture, is now open for enrollment!

It covers the key distributed data management patterns including Saga, API Composition, and CQRS.

It consists of video lectures, code labs, and a weekly ask-me-anything video conference repeated in multiple timezones.

The regular price is $395/person but use coupon WURMXAJV to sign up for $95 (valid until July 19th, 2024). There are deeper discounts for buying multiple seats.

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Learn how to create a service template and microservice chassis

Take a look at my Manning LiveProject that teaches you how to develop a service template and microservice chassis.

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Eventuate is Chris's latest startup. It makes it easy to use the Saga pattern to manage transactions and the CQRS pattern to implement queries.

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