Event Sourcing & CQRS from the Trenches • Sidney Shek • YOW! 2016

This presentation was recorded at YOW! 2016. #GOTOcon #YOW https://yowcon.com Sidney Shek - Architect at Atlassian RESOURCES https://x.com/sidneyshek https://www.linkedin.com/in/sidney-shek ABSTRACT At Atlassian, we are in the midst of an architectural shift towards microservices to provide a scalable and flexible platform for our cloud services. In order to achieve this safely with no risk of losing customer data, we are investigating ‘event sourcing’ for representing our domain models i.e. capturing streams of immutable events to represent data instead of the traditional update-in-place paradigm. With event sourcing, old versions of data can be easily restored and audit trails are available by default to help with debugging. In combination with the command-query responsibility separation (CQRS) pattern, we can seamlessly bring online new functionality requiring schema changes or new query patterns, and re-architect later for more scale simply by replaying and reinterpreting events into new microservices and ephemeral data stores. In this talk, I will describe in detail what event sourcing and CQRS are, why we are using this approach, and a walk through of our implementation in Scala (leveraging scalaz-streams) in an AWS environment using #DynamoDB, #Kinesis and #Lambdas. [...] RECOMMENDED BOOKS Ethan Garofolo • Practical Microservices • https://amzn.to/3BXjCjQ Adam Bellemare • Building Event-Driven Microservices • https://amzn.to/3CydWwZ Forsgren, Humble & Kim • Accelerate: The Science of Lean Software and DevOps • https://amzn.to/3tCz1xO John Arundel & Justin Domingus • Cloud Native DevOps with Kubernetes • https://amzn.to/3hKZvI5 Wynne, Hellesoy & Tooke • The Cucumber Book • https://amzn.to/3tEUINJ https://twitter.com/GOTOcon https://www.linkedin.com/company/goto- https://www.instagram.com/goto_con https://www.facebook.com/GOTOConferences #CQRS #EventSourcing #Immutability #SoftwareEngineering #SoftwareDevelopment #Programming #Complexity #SidneyShek #YOWcon Looking for a unique learning experience? Attend the next GOTO conference near you! Get your ticket at https://gotopia.tech Sign up for updates and specials at https://gotopia.tech/newsletter SUBSCRIBE TO OUR CHANNEL - new videos posted almost daily. https://www.youtube.com/user/GotoConferences/?sub_confirmation=1