Domain Modeling Made Functional by Wlaschin, Scott -- Read -- Imperial Library of Trantor

Index

Domain Modeling Made Functional

About the Pragmatic Bookshelf Table of Contents Early praise for Domain Modeling Mad e Functional Preface

Who Is This Book For? What’s in This Book? Other Approaches to Domain Modeling Working with the Code in This Book Questions or Suggestions? Credits Acknowledgments

Pa rt 1 Understanding the Domain

Chapter 1: Introducing Domain-Driven Design

The Importance of a Shared Model Understanding the Domain Through Business Event s Partitioning the Domain into Subdomains Creating a Solution Using Bounded Con texts Creating a Ubiquitous Language Summarizing the Concepts of Domain-Driven Desi gn Wrapping Up

Chapter 2: Understanding the Domain

Interview with a Domain Expert Fighting the Impulse to Do Database-Driven Des ign Fighting the Impulse to Do Class-Driven Design Documenting the Domain Diving Deeper into the Order-Taking Wo rkflow Representing Complexity in Our Domain Model Wrapping Up

Chapter 3: A Functional Architecture

Bounded Contexts as Autonomous Software Compon ents Communicating Between Bounded Contexts Contracts Between B ounded Contexts Workflows Within a Bounded Context Code Structure Within a Bounded Context Wrapping Up What’s Next

Part 2: Modeling the Domain

Chapter 4: Understanding Types

Understanding Functions Types and Functions Composition of Types Working with F# Types Building a Domain Model by Composing Types Modeling Optional Values, Errors, and Collecti ons Organizing Types in Files an d Projects Wrapping Up

Chapter 5: Domain Modeling with Types

Reviewing the Domain Model Seeing Patterns in a Domain Model Modeling Simple Values Modeling Complex Data Modeling Workflows with Functions A Question of Identity: Value Objects A Question of Identity: Entities Aggregates Putting It All Together Wrapping Up

Chapter 6: Integrity and Consistency in the Domain

The Integrity of Simple V alues Units of Measure Enforcing Invariants with the Type System Capturing Business Rules in the Type System Consistency Wrapping Up

Chapter 7: Modeling Workflows as Pipelines

The Workflow Input Modeling an Order as a Set of States State Machines Modeling Each Step in the Workflow with Types Documenting Effects Composing the Workflow fro m the Steps Are Dependencies Part of the Design? The Complete Pipeline Long-Running Workflows Wrapping Up What’s Next

Part 3: Implementing the Model

Chapter 8: Understanding Functions

Functions, Functions, Everywhere Functions Are Things Total Functions Composition Wrapping Up

Chapter 9: Implementation: Composing a Pipeline

Working with Simple Types Using Function Types to Guide the Implementat ion Implementing the Validatio n Step Implementing the Rest of the Steps Composing the Pipeline Steps Together Injecting Dependencies Testing Dependencies The Assembled Pipeline Wrapping Up

Chapter 10: Implementation: Working with Errors

Using the Result Type to Make Errors Explicit Working with Domain Errors Chaining Result-Generating Functions Using bind and map in Our Pipeline Adapting Other Kinds of Functions to the Two- Track Model Making Life Easier with Computation Expressio ns Monads and More Adding the Async Effect Wrapping Up

Chapter 11: Serialization

Persistence vs. Serialization Designing for Serialization Connecting the Serialization Code to the Work flow A Complete Serialization Example How to Translate Domain Types to DTOs Wrapping Up

Chapter 12: Persistence

Pushing Persistence to the Edges Command-Query Separation Bounded Contexts Must Own Their Data Storage Working with Document Databases Working with Relational Databases Transactions Wrapping Up

Chapter 13: Evolving a Design and Keeping It Clean

Change 1: Adding Shipping Charges Change 2: Adding Support for VIP Customers Change 3: Adding Support for Promotion Codes Change 4: Adding a Business Hours Constraint Dealing with Additional Requirements Changes Wrapping Up Wrapping Up the Book