The important thing in DDD is the strategic part. Bounded context says that this term of this concept is really have a specific meaning in this specific context and may have another meaning in a different context. So you know you have those different strategy paths that you have to discover when using domain-driven design. That's I think what was the most important thing for me to discover and help me with many products by the way. In functional programming you have this concept of immittability and in DDD you have the concept of domain events. Domain events are facts that has occurred and you cannot change them. You can just acknowledge that something has happened. The fact that you have this image that
“Time is important for business. We have to model it explicitly. Temporal modeling means that we use time-based artifacts as first modeling citizens."
Tomasz Jaskula is the CTO and co-founder of Luteceo and an experienced software developer and architect. In this episode, we started off discussing how Domain-Driven Design (DDD) influenced Tomasz’s view on software development approach and its relation with functional programming. Tomasz then explained in depth about the time concept in business applications and temporal modeling, in particular, bi-temporal modeling. He mentioned the different concepts of time in temporal modeling, explaining them using an example for easier illustration. We then extended our discussion further to Event Sourcing, understanding the key concept, its relation to temporal modeling, when we should decide to use Event Sourcing in our application, and some available tools that can help us implement Event Sourcing.
Listen out for:
- Career Journey - [00:04:58]
- DDD and Bounded Context - [00:08:56]
- DDD and Functional Programming - [00:13:24]
- Temporal Modeling - [00:14:47]
- 3 Different Types of Time - [00:21:13]
- Event Sourcing - [00:25:42]
- When to Use Event Sourcing - [00:28:13]
- Event Sourcing Tools - [00:34:02]
- 3 Tech Lead Wisdom - [00:36:10]
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Tomasz’s Bio
Tomasz Jaskuła is CTO and co-founder of Luteceo, a software consulting company in Paris. Tomasz has more than 20 years of professional experience as a developer and software architect, and worked for many companies in the e-commerce, industry, insurance, and financial fields. He has mainly focused on creating software that delivers true business value, aligns with strategic business initiatives, and provides solutions with clearly identifiable competitive advantages. Tomasz is also a main contributor to the OSS project XOOM for the .NET platform. In his free time, Tomasz perfects his guitar playing and spends time with his family. He recently wrote a book with Vaughn Vernon titled “Strategic Monoliths and Microservices” published by Addison-Wesley.
Follow Tomasz:
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For more info about the episode (including quotes and transcript), visit techleadjournal.dev/episodes/66.
