ThoughtWorks
  • Contact
  • Español
  • Português
  • Deutsch
  • 中文
Go to overview
  • Engineering Culture, Delivery Mindset

    Embrace a modern approach to software development and deliver value faster

    Intelligence-Driven Decision Making

    Leverage your data assets to unlock new sources of value

  • Frictionless Operating Model

    Improve your organization's ability to respond to change

    Platform Strategy

    Create adaptable technology platforms that move with your business strategy

  • Experience Design and Product Capability

    Rapidly design, deliver and evolve exceptional products and experiences

    Partnerships

    Leveraging our network of trusted partners to amplify the outcomes we deliver for our clients

Go to overview
  • Automotive
  • Cleantech, Energy and Utilities
  • Financial Services and Insurance
  • Healthcare
  • Media and Publishing
  • Not-for-profit
  • Public Sector
  • Retail and E-commerce
  • Travel and Transport
Go to overview

Featured

  • Technology

    An in-depth exploration of enterprise technology and engineering excellence

  • Business

    Keep up to date with the latest business and industry insights for digital leaders

  • Culture

    The place for career-building content and tips, and our view on social justice and inclusivity

Digital Publications and Tools

  • Technology Radar

    An opinionated guide to technology frontiers

  • Perspectives

    A publication for digital leaders

  • Digital Fluency Model

    A model for prioritizing the digital capabilities needed to navigate uncertainty

  • Decoder

    The business execs' A-Z guide to technology

All Insights

  • Articles

    Expert insights to help your business grow

  • Blogs

    Personal perspectives from ThoughtWorkers around the globe

  • Books

    Explore our extensive library

  • Podcasts

    Captivating conversations on the latest in business and tech

Go to overview
  • Application process

    What to expect as you interview with us

  • Grads and career changers

    Start your tech career on the right foot

  • Search jobs

    Find open positions in your region

  • Stay connected

    Sign up for our monthly newsletter

Go to overview
  • Conferences and Events
  • Diversity and Inclusion
  • News
  • Open Source
  • Our Leaders
  • Social Change
  • Español
  • Português
  • Deutsch
  • 中文
ThoughtWorksMenu
  • Close   ✕
  • What we do
  • Who we work with
  • Insights
  • Careers
  • About
  • Contact
  • Back
  • Close   ✕
  • Go to overview
  • Engineering Culture, Delivery Mindset

    Embrace a modern approach to software development and deliver value faster

  • Experience Design and Product Capability

    Rapidly design, deliver and evolve exceptional products and experiences

  • Frictionless Operating Model

    Improve your organization's ability to respond to change

  • Intelligence-Driven Decision Making

    Leverage your data assets to unlock new sources of value

  • Partnerships

    Leveraging our network of trusted partners to amplify the outcomes we deliver for our clients

  • Platform Strategy

    Create adaptable technology platforms that move with your business strategy

  • Back
  • Close   ✕
  • Go to overview
  • Automotive
  • Cleantech, Energy and Utilities
  • Financial Services and Insurance
  • Healthcare
  • Media and Publishing
  • Not-for-profit
  • Public Sector
  • Retail and E-commerce
  • Travel and Transport
  • Back
  • Close   ✕
  • Go to overview
  • Featured

  • Technology

    An in-depth exploration of enterprise technology and engineering excellence

  • Business

    Keep up to date with the latest business and industry insights for digital leaders

  • Culture

    The place for career-building content and tips, and our view on social justice and inclusivity

  • Digital Publications and Tools

  • Technology Radar

    An opinionated guide to technology frontiers

  • Perspectives

    A publication for digital leaders

  • Digital Fluency Model

    A model for prioritizing the digital capabilities needed to navigate uncertainty

  • Decoder

    The business execs' A-Z guide to technology

  • All Insights

  • Articles

    Expert insights to help your business grow

  • Blogs

    Personal perspectives from ThoughtWorkers around the globe

  • Books

    Explore our extensive library

  • Podcasts

    Captivating conversations on the latest in business and tech

  • Back
  • Close   ✕
  • Go to overview
  • Application process

    What to expect as you interview with us

  • Grads and career changers

    Start your tech career on the right foot

  • Search jobs

    Find open positions in your region

  • Stay connected

    Sign up for our monthly newsletter

  • Back
  • Close   ✕
  • Go to overview
  • Conferences and Events
  • Diversity and Inclusion
  • News
  • Open Source
  • Our Leaders
  • Social Change
Blogs
Select a topic
View all topicsClose
Technology 
Agile Project Management Cloud Continuous Delivery  Data Science & Engineering Defending the Free Internet Evolutionary Architecture Experience Design IoT Languages, Tools & Frameworks Legacy Modernization Machine Learning & Artificial Intelligence Microservices Platforms Security Software Testing Technology Strategy 
Business 
Financial Services Global Health Innovation Retail  Transformation 
Careers 
Career Hacks Diversity & Inclusion Social Change 
Blogs

Topics

Choose a topic
  • Technology
    Technology
  • Technology Overview
  • Agile Project Management
  • Cloud
  • Continuous Delivery
  • Data Science & Engineering
  • Defending the Free Internet
  • Evolutionary Architecture
  • Experience Design
  • IoT
  • Languages, Tools & Frameworks
  • Legacy Modernization
  • Machine Learning & Artificial Intelligence
  • Microservices
  • Platforms
  • Security
  • Software Testing
  • Technology Strategy
  • Business
    Business
  • Business Overview
  • Financial Services
  • Global Health
  • Innovation
  • Retail
  • Transformation
  • Careers
    Careers
  • Careers Overview
  • Career Hacks
  • Diversity & Inclusion
  • Social Change
MicroservicesTechnology

Microservices in a Nutshell

James Lewis & Martin Fowler James Lewis & Martin Fowler

Published: Jun 27, 2014

The term "Microservice Architecture" has sprung up over the last few years to describe a particular way of designing software applications as suites of independently deployable services. While there is no precise definition of this architectural style, there are certain common characteristics around organization around business capability, automated deployment, intelligence in the endpoints, and decentralized control of languages and data.

The following is an except from an article that originally appeared on Martin Fowler's website.  

"Microservices" - yet another new term on the crowded streets of software architecture. Although our natural inclination is to pass such things by with a contemptuous glance, this bit of terminology describes a style of software systems that we are finding more and more appealing. We've seen many projects use this style in the last few years, and results so far have been positive, so much so that for many of our colleagues this is becoming the default style for building enterprise applications. Sadly, however, there's not much information that outlines what the microservice style is and how to do it.

In short, the microservice architectural style is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API. These services are built around business capabilities and independently deployable by fully automated deployment machinery. There is a bare mininum of centralized management of these services, which may be written in different programming languages and use different data storage technologies.

To start explaining the microservice style it's useful to compare it to the monolithic style: a monolithic application built as a single unit. Enterprise Applications are often built in three main parts: a client-side user interface (consisting of HTML pages and javascript running in a browser on the user's machine) a database (consisting of many tables inserted into a common, and usually relational, database management system), and a server-side application. The server-side application will handle HTTP requests, execute domain logic, retrieve and update data from the database, and select and populate HTML views to be sent to the browser. This server-side application is a monolith - a single logical executable. Any changes to the system involve building and deploying a new version of the server-side application.

Such a monolithic server is a natural way to approach building such a system. All your logic for handling a request runs in a single process, allowing you to use the basic features of your language to divide up the application into classes, functions, and namespaces. With some care, you can run and test the application on a developer's laptop, and use a deployment pipeline to ensure that changes are properly tested and deployed into production. You can horizontally scale the monolith by running many instances behind a load-balancer.

Monolithic applications can be successful, but increasingly people are feeling frustrations with them - especially as more applications are being deployed to the cloud . Change cycles are tied together - a change made to a small part of the application, requires the entire monolith to be rebuilt and deployed. Over time it's often hard to keep a good modular structure, making it harder to keep changes that ought to only affect one module within that module. Scaling requires scaling of the entire application rather than parts of it that require greater resource. 

These frustrations have led to the microservice architectural style: building applications as suites of services. As well as the fact that services are independently deployable and scalable, each service also provides a firm module boundary, even allowing for different services to be written in different programming languages. They can also be managed by different teams.

We do not claim that the microservice style is novel or innovative, its roots go back at least to the design principles of Unix. But we do think that not enough people consider a microservice architecture and that many software developments would be better off if they used it.

For more information: 

James and Martin’s article goes on to define what a microservice architecture is by laying out 9 common characteristics, discussing its relationship with Service-Oriented Architecture, and considering whether this style is the future of enterprise software. Read it here: martinfowler.com/articles/microservices.html. 

Watch James' recent talk in London on Microservices.

 

James Lewis is a Principal Consultant at ThoughtWorks and member of the Technology Advisory Board. James' interest in building applications out of small collaborating services stems from a background in integrating enterprise systems at scale. He's built a number of systems using microservices and has been an active participant in the growing community for a couple of years.

Martin Fowler is an author, speaker, and general loud-mouth on software development. He's long been puzzled by the problem of how componentize software systems, having heard more vague claims than he's happy with. He hopes that microservices will live up to the early promise its advocates have found.

  • What we do
  • Who we work with
  • Insights
  • Careers
  • About
  • Contact

WeChat

×
QR code to ThoughtWorks China WeChat subscription account

Media and analyst relations | Privacy policy | Modern Slavery statement ThoughtWorks| Accessibility | © 2021 ThoughtWorks, Inc.