Old School

I kept using SELECT FOR UPDATE at work. Reading PostgreSQL internals made me check which operations it blocks—and which ones can still run.

I used to think IoT was simple: device connects, publishes a message, backend subscribes, data goes into the database. The connection is only the beginning.

I'd been through Refactoring.Guru and Head First Design Patterns. I could name every pattern. But when it came to actually designing something, I was still lost — until this book showed me the difference.

I originally picked this book up for Contract Testing. What stuck was Saga and Outbox. Then I actually built both — and found out the part that eats your time isn't in the book.