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Scala 3 Domain Design & Typelevel Stack Cookbook

Domain Design & Typelevel Stack Cookbook

Scala 3 Domain Design & Typelevel Stack Cookbook
This book is 40% completeLast updated on 2026-08-30

A Scala book that goes straight to the point. Touches upon the beauty of domain design in Scala and tries to alleviate some gripes about the Typelevel stack by handing quick recipes.

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About

About

About the Book

A Scala book that goes straight to the point. Touches upon the beauty of domain design in Scala and tries to alleviate some gripes about the Typelevel stack by handing quick recipes.

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Author

About the Author

David Flores

Software Engineer that loves reasoning about the inner workings of everything. Also a musician and arts lover.

Contents

Table of Contents

  • Introduction — What This Book Is (and Isn't)
  • Part 1 Introduction
    1. Opaque Types — Type Safety Without the Runtime Tax
    2. ADTs & Enums — Making Illegal States a Compile Error
    3. Smart Constructors — Validation at the Border
    4. Type Classes with given/using — Behavior Without Inheritance
    5. State Machines — Letting the Compiler Enforce Your Workflow
    6. Domain Errors as Data — Ditching Exceptions for Good
    7. Enforcing Multi-Field Invariants on Aggregates
  • Part 2 Introduction — The TypeStack, Demystified
    1. Bootstrapping an http4s Server
    2. Routers — Defining, Composing and Merging Routes
    3. Decoding & Validating Requests
    4. Centralized Error Handling Middleware
    5. JWT Authentication
    6. Rate Limiting
    7. Config, Logging & Structured Context
    8. Wiring Your App as a Resource Graph
    9. Concurrency Patterns: Fibers, Parallelism, Timeouts & Racing
    10. Scheduled Jobs with fs2
    11. Handling Uploaded and Returned Files Safely with fs2
  • Closing Notes

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