They asked if I would like to work on a book about Domain-Driven Design. In January of this year I was approached by Manning. I’ve said it before, but this is an important encouragement to keep going. I absolutely love how early supporters bought this book when they could only read a few chapters.
This allows me to publish the first chapters, and then keep publishing new chapters over the course of several months. For me publishing through Leanpub has always worked well, maybe because my writing process usually turns out to be more or less linear. Soon enough I was able to publish a couple of chapters on Leanpub. I thought it would be very important to make it a practical book, with short and clear rules for object design. While exploring the subject area I realized there would be a lot to write about, and a lot to declare as out-of-scope too.
An entity is the only type of mutable object in an application.An entity always has a named constructor.A service gets its dependencies and configuration values injected as constructor arguments.Not as low level as the kind of programming advice people usually refer to as clean code, but general programming rules for different kinds of objects. It turned out that, after days of high level training on web application architecture and Domain-Driven Design, there was a need for some kind of manual for low level object-oriented programming. The idea for it came from a conversation I had with the friendly folks at Akeneo (Nantes) earlier that year. In November 2018 I started working on this book. Today Manning released my latest book! It’s called “Object Design Style Guide”.
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