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Implementing Domain-Driven Design [Englisch] [Gebundene Ausgabe]

Vaughn Vernon
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Inhaltsverzeichnis

 

Foreword    xvii

Preface xix

Acknowledgments    xxix

About the Author xxxiii

Guide to This Book   xxxv

 

Chapter 1: Getting Started with DDD 1

Can I DDD? 2

Why You Should Do DDD 6

How to Do DDD 20

The Business Value of Using DDD 25

The Challenges of Applying DDD 29

Fiction, with Bucketfuls of Reality 38

Wrap-Up 41

 

Chapter 2: Domains, Subdomains, and Bounded Contexts    43

Big Picture   43

Why Strategic Design Is So Incredibly Essential    53

Real-World Domains and Subdomains 56

Making Sense of Bounded Contexts 62

Sample Contexts 72

Wrap-Up 84

 

Chapter 3: Context Maps 87

Why Context Maps Are So Essential 87

Wrap-Up 111

 

Chapter 4: Architecture 113

Interviewing the Successful CIO 114

Layers   119

Hexagonal or Ports and Adapters 125

Service-Oriented 130

Representational State Transfer–REST 133

Command-Query Responsibility Segregation, or CQRS 138

Event-Driven Architecture 147

Data Fabric and Grid-Based Distributed Computing 163

Wrap-Up 168

 

Chapter 5: Entities 171

Why We Use Entities 171

Unique Identity 173

Discovering Entities and Their Intrinsic Characteristics 191

Wrap-Up 217

 

Chapter 6: Value Objects   219

Value Characteristics 221

Integrate with Minimalism 232

Standard Types Expressed as Values 234

Testing Value Objects 239

Implementation   243

Persisting Value Objects 248

Wrap-Up 263

 

Chapter 7: Services   265

What a Domain Service Is (but First, What It Is Not) 267

Make Sure You Need a Service 268

Modeling a Service in the Domain 272

Testing Services   281

Wrap-Up 284

 

Chapter 8: Domain Events   285

The When and Why of Domain Events 285

Modeling Events 288

Publishing Events from the Domain Model 296

Spreading the News to Remote Bounded Contexts 303

Event Store 307

Architectural Styles for Forwarding Stored Events 312

Implementation 318

Wrap-Up 331

 

Chapter 9: Modules 333

Designing with Modules 333

Basic Module Naming Conventions 336

Module Naming Conventions for the Model 337

Modules of the Agile Project Management Context   340

Modules in Other Layers 343

Module before Bounded Context 344

Wrap-Up 345

 

Chapter 10: Aggregates 347

Using Aggregates in the Scrum Core Domain 348

Rule: Model True Invariants in Consistency Boundaries 353

Rule: Design Small Aggregates 355

Rule: Reference Other Aggregates by Identity 359

Rule: Use Eventual Consistency Outside the Boundary 364

Reasons to Break the Rules 367

Gaining Insight through Discovery   370

Implementation 380

Wrap-Up   388

 

Chapter 11: Factories 389

Factories in the Domain Model 389

Factory Method on Aggregate Root 391

Factory on Service   397

Wrap-Up 400

 

Chapter 12: Repositories 401

Collection-Oriented Repositories 402

Persistence-Oriented Repositories 418

Additional Behavior 430

Managing Transactions   432

Type Hierarchies 437

Repository versus Data Access Object 440

Testing Repositories 441

Wrap-Up 448

 

Chapter 13: Integrating Bounded Contexts    449

Integration Basics 450

Integration Using RESTful Resources 458

Integration Using Messaging 469

Wrap-Up   508

 

Chapter 14: Application   509

User Interface   512

Application Services 521

Composing Multiple Bounded Contexts 531

Infrastructure 532

Enterprise Component Containers 534

Wrap-Up 537

 

Appendix A: Aggregates and Event Sourcing: A+ES   539

Inside an Application Service 541

Command Handlers 549

Lambda Syntax 553

Concurrency Control 554

Structural Freedom with A+ES 558

Performance 558

Implementing an Event Store 561

Relational Persistence 565

BLOB Persistence 568

Focused Aggregates 569

Read Model Projections 570

Use with Aggregate Design   573

Events Enrichment   573

Supporting Tools and Patterns   576

Contract Generation 580

Unit Testing and Specifications 582

Event Sourcing in Functional Languages 583

 

Bibliography   585

Index      589

 

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