Cliff Richardson - A Pattern Language for Microservices

Website

• www.microservices.io 
• Plain Old Objects
• Eventuate
• Chris Richardson Consulting

Author

"Chris Richardson is a developer and architect with over 20 years of experience. He is a Java Champion and the author of POJOs in Action, which describes how to build enterprise Java applications with POJOs and frameworks such as Spring and Hibernate. Chris is the founder of the original CloudFoundry.com. He now spends his time providing microservices consulting and training and working on his third startup, Eventuate, Inc. Chris has a computer science degree from the University of Cambridge in England and lives in Oakland, CA."

Summary

From the home page ..."Microservices - also known as the microservice architecture - is an architectural style that structures an application as a collection of services that are

• Highly maintainable and testable
• Loosely coupled
• Independently deployable
• Organized around business capabilities.

The microservice architecture enables the continuous delivery/deployment of large, complex applications. It also enables an organization to evolve its technology stack."

Contents

How to apply the patterns

Application architecture patterns

• Monolithic architecture
• Microservice architecture

Decomposition

• Decompose by business capability
• Decompose by subdomain

Deployment patterns

• Multiple service instances per host
• Service instance per host
• Service instance per VM
• Service instance per Container
• Serverless deployment
• Service deployment platform

Cross cutting concerns

• Microservice chassis
• Externalized configuration

Communication style

• Remote Procedure Invocation
• Messaging
• Domain-specific protocol

External API

• API gateway
• Backend for front-end

Transactional messaging

• Transactional outbox
• Transaction log tailing
• Polling publisher

Service discovery

• Client-side discovery
• Server-side discovery
• Service registry
• Self registration
• 3rd party registration

Reliability

• Circuit Breaker

Data management

• Database per Service
• Shared database
• Saga new
• API Composition new
• CQRS
• Event sourcing
• Application events

Security

• Access Token

Testing

• Service Component Test
• Consumer-driven contract test
• Consumer-side contract test

Observability

• Log aggregation
• Application metrics
• Audit logging
• Distributed tracing
• Exception tracking
• Health check API
• Log deployments and changes new

UI patterns

• Server-side page fragment composition
• Client-side UI composition

Presentations

• https://microservices.io/presentations/index.html

Mike's Notes

• Has a useful outline of options to choose from when considering using Microservices
• Good diagrams
• Has written a book
• Offers training
• Has skin in the game