Domain-Driven Design: Tackling Complexity in the Heart of Software

Crunching Knowledge......Page 2
Ingredients of Effective Modeling......Page 6
Knowledge Crunching......Page 7
Knowledge-Rich Design......Page 8
Deep Models......Page 11
Ubiquitous Language......Page 12
Modeling Out Loud......Page 17
One Team, One Language......Page 18
Documents and Diagrams......Page 19
Explanatory Models......Page 22
Binding Model and Implementation......Page 25
Model-Driven Design......Page 26
Modeling Paradigms and Tool Support......Page 28
Letting the Bones Show: Why Models Matter to Users......Page 33
Hands-On Modelers......Page 34
Layered Architecture......Page 36
The Domain Layer Is Where the Model Lives......Page 40
The Smart UI “Anti-Pattern”......Page 41
Other Kinds of Isolation......Page 43
A Model Expressed in Software......Page 44
Associations......Page 45
Entities (a.k.a. Reference Objects)......Page 49
Value Objects......Page 54
Services......Page 59
Modules (a.k.a. Packages)......Page 62
Modeling Paradigms......Page 66
The Life Cycle of a Domain Object......Page 70
Aggregates......Page 71
Factories......Page 79
Repositories......Page 86
Designing Objects for Relational Databases......Page 94
Introducing the Cargo Shipping System......Page 96
Distinguishing ENTITIES and VALUE Objects......Page 98
Designing Associations in the Shipping Domain......Page 100
AGGREGATE Boundaries......Page 101
Selecting REPOSITORIES......Page 102
Walking Through Scenarios......Page 103
Object Creation......Page 104
Pause for Refactoring: An Alternative Design of the Cargo AGGREGATE......Page 106
MODULES in the Shipping Model......Page 108
Introducing a New Feature: Allocation Checking......Page 110
A Final Look......Page 113
Breakthrough......Page 115
Story of a Breakthrough......Page 116
Epilogue: A Cascade of New Insights......Page 121
Digging Out Concepts......Page 123
How to Model Less Obvious Kinds of Concepts......Page 132
Supple Design......Page 147
Intention-Revealing Interfaces......Page 149
Side -Effect-Free Functions......Page 152
Assertions......Page 156
Conceptual Contours......Page 159
Standalone Classes......Page 163
Closure of Operations......Page 164
Declarative Design......Page 166
A Declarative Style of Design......Page 168
Angles of Attack......Page 174
Applying Analysis Patterns......Page 181
ExampleEarning Interest with Accounts......Page 182
ExampleInsight into the Nightly Batch......Page 186
Analysis Patterns Are Knowledge to Draw On......Page 190
Relating Design Patterns to the Model......Page 191
Strategy (A.K.A.Policy)......Page 192
Composite......Page 194
Why Not FLYWEIGHT?......Page 199
Exploration Teams......Page 201
Prior Art......Page 202
Crisis as Opportunity......Page 203
Maintaining Model Integrity......Page 205
Bounded Context......Page 207
Continuous Integration......Page 211
Context Map......Page 213
Shared Kernel......Page 219
Customer/Supplier Development Teams......Page 221
Conformist......Page 224
Anticorruption Layer......Page 226
Separate Ways......Page 230
Open Host Service......Page 231
Published Language......Page 232
Unifying an Elephant......Page 234
Choosing Your Model Context Strategy......Page 237
Transformations......Page 242
Distillation......Page 247
Core Domain......Page 248
An Escalation of Distillations......Page 251
Generic Subdomains......Page 252
Domain Vision Statement......Page 257
Highlighted Core......Page 258
Cohesive Mechanisms......Page 261
Segregated Core......Page 264
Abstract Core......Page 270
Choosing Refactoring Targets......Page 271
Large-Scale Structure......Page 272
Evolving Order......Page 274
System Metaphor......Page 276
Responsibility Layers......Page 277
Knowledge Level......Page 288
Pluggable Component Framework......Page 294
How Restrictive Should a Structure Be?......Page 298
Refactoring Toward a Fitting Structure......Page 299
Combining Large-Scale Structures and BOUNDED CONTEXTS......Page 301
Combining Large-Scale Structures and Distillation......Page 304
Who Sets the Strategy?......Page 305
Six Essentials for Strategic Design Decision Making......Page 306
Epilogues......Page 310
Looking Forward......Page 313
Appendix - 
The Use of Patterns in This Book......Page 315
Pattern Name......Page 316
GLOSSARY......Page 318
References......Page 322
PHOTO CREDITS......Page 324