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CQRS applications brings some new challenges for statically typed language lovers since a considerable amount of the modeling effort goes to the definition of Commands and Events as separated entities without direct connection with the main domain model classes.
The biggest challenge is how to model a domain as an Algebraic Data Type where its operations are modeled as Commands and Events (themselves also ADTs) and have everything defined as a cohesive, well-typed domain.
This can be achieved in different ways: using type parameters, type members or type classes. Each solution has its Pros and Cons that you will explore and discuss in detail.
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Method reification and type-safety in a CQRS world - Intermediate
Renato is a software developer at Lightbend where he works in the Lagom Framework Team. Scala aficionado since 2009, he has been hacking in Scala and related technologies for fun and profit. He has a special interest for Event Sourcing/CQRS, DDD and Microservices Architectures. He's the founder of BeScala (Belgian Scala User Group) and maintainer of Lagom Framework.