Getting Started With Event Sourcing

Transcript

1. By: Asrul Sani Ariesandy Data Engineer Getting Started With Event Sourcing
2. About Me: Name : Asrul Sani Ariesandy What I do: Data Engineer @Kata.ai
3. Event Sourcing? In Event sourcing (ES) we can look at a system and say that there are actions and every action causes a reaction. The action, in this case, can be implemented as commands and the reactions as events. (Netijen Mesir, 3000SM)
5. The Problems With CRUD 1. Too straight forward term (Create, Read, Update and Delete) 2. Domain experts don't speak in CRUD terms (Need: Ubiquitous Language) 3. CRUD is how we as developers have trained ourselves to think.
6. CRUD VS ES
7. Command Query Responsibility Segregation A command tells our application to do something. Its name always uses the indicative tense, like TerminateBusiness or SendForgottenPasswordEmail. Query Command Getting some information from the system.
8. Command Model and Query Model When methods on the ThingCommands interface are executed, the Command Model state is mutated. When methods on the ThingQueries interface are executed, the Query Model state is queried. (Kang Tahu Campur Sebelah, 2020)
9. CQRS and Architecture Ports and Adapters is an architecture that has an impact on the way an application or service as a whole works. (Kang Parkir DILO, 1942)
10. TERIMAKASIH