DevLOVE Beautiful Development - 第一幕 陽の巻
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This document provides an overview of domain-driven design (DDD) patterns and principles including: 1. It discusses common DDD patterns such as entities, value objects, aggregates, factories, repositories and services. 2. It explains the differences between entities and value objects and how they are used in a domain model. 3. It covers key DDD concepts like modeling the domain, isolating the domain layer, object life cycles and working with aggregates.
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DevLOVE Beautiful Development - 第一幕 陽の巻
- 1. DDD Pt.II Building Blocks ~DDD ~ ( ) - tricreo.jp / Jiemamy Project - jiemamy.org 2011.04.09 @
- 2. • (@daisuke_m) • Jiemamy / java-ja • Apache Mahout • Java / OO / DDD •
- 3. works • @IT — Jiemamy • • Java • Java • Java: The Good Parts ( ) • DDD ( )
- 4. DDD http://d.hatena.ne.jp/daisuke-m/20110407/1302156870 • Jiemamy Project • • • DDD • • Jiemamy version 0.3 • baseunits library (timeandmoney)
- 5. Jiemamy • ER • Eclipse (UI ) • DB , SQL ( ) • SQL… • XML I/O, DDD ( )
- 6. Agenda • DDD overview • Isolating the Domain • Model • LifeCycle
- 7. §0 DDD overview • DDD • GoF • PoEAA
- 8. DDD PATTERNS • STRATEGY • OPEN HOST SERVICE • COMPOSITE • CORE DOMAIN • BOUNDED CONTEXT • GENERIC SUBDOMAINS • CONTINUOUS INTEGRATION • DOMAIN VISION STATEMENT • CONTEXT MAP • HIGHLIGHTED CORE • SHARED KERNEL • COHESIVE MECHANISMS • CUSTOMER/SUPPLIER DEVELOPMENT TEAMS • SUGGESTED CORE • CONFORMIST • ABSTRACT CORE • ANTICORRUPTION LAYER • EVOLVING ORDER • SEPARATE WAYS • SYSTEM METAPHOR • OPEN HOST SERVICE • RESPONSIVILITY LAYERS • PUBLISHED LANGUAGE • KNOWLEDGE LEVEL • INTEGRATION • PLUGGABLE COMPONENT FRAMEWORK
- 9. DDD PATTERNS • UBIQUITOUS LANGUAGE • FACTRIES • MODEL-DRIVEN DESIGN • REPOSITORIES • HANDS-ON MODELERS • SPECIFICATION • LAYERED ARCHITECTURE • INTENTION-REVEALING INTERFACES • THE SMART UI "ANTI-PATTERN" • SIDE-EFFECT-FREE FUNCTION • ENTITIES • VALUE OBJECTS • ASSERTIONS • SERVICES • CONCEPTUAL CONTOURS • MODULES • STANDALONE CLASSES • AGGREGATES • CLOSURE OF OPERATIONS
- 10. • • • •( )
- 11. • • •
- 12. Domain or Not • • • HISTORY • • • •
- 13. • UI • DB • • DB
- 14. • • • •
- 15. • → • → • ® • • • ® • •
- 16. • • •
- 17. • • • • Model Driven Design ( ) •
- 18. Model or Not • LibHTTP • User • Search • File • FacebookLogin • String • Translation • StringBuilder • FoobarLogic • YearMonth
- 19. §1 • • • • UI
- 20. LAYERED ARCHITECTURE • • ; •
- 21. Jiemamy DiagramEditor TableView DbObjectEditPart maven-jiemamy-plugin UI jiemamy eclipse plugin ExecuteMojo Application jiemamy-diagram JmDiagram JmNode / JmConnection SqlStatement jiemamy-sql Domain Token JmTable / JmView JmColumn jiemamy-core JmForeignKeyConstraint woodstox SqlExecutor / UUIDProvider XMLInputFactory Infrastructure XMLValidationSchema jiemamy-commons apache commons
- 22. THE SMART UI "ANTI-PATTERN" • DDD • • • light MDD
- 23. UI DB User#save(); → DB toString() ! "<span>...</span>"
- 24. §2 • • • 3 • ENTITY (E) • VALUE OBJECT (VO) • SERVICE
- 25. • • • • Table knows Columns / Column knows Table • Emp knows Dept / Dept knows Emps
- 26. class Emp { class Dept { String name; String name; Dept dept; List<Emp> members; } } Dept tech = new Dept(" "); Emp kato = new Emp(" "); kato.setDept(tech); tech.addMember(kato);
- 27. • Declaration & Reference • Repository
- 28. ENTITY (E) • • • vs • (SE) vs ( )
- 30. • 31 32 31 (File / DB) 32 (On Memory) • • Serialize / Deserialize clone…
- 31. ENTITY • Table • Order • Column • Customer • ForeignKey • Employee • Department
- 32. ENTITY • • • ID • equals hashCode ID
- 33. • ENTITY • ID • • •
- 34. E Column col = ...; // ← ENTITY tableFoo.addColumn(col); tableBar.addColumn(col); // something tableFoo.getColumn(...).setName("AAA"); tableBar
- 35. • ID • (v0.2) •
- 36. VALUE OBJECT (VO) • • • new String("foo") vs new String("foo") • man.getName(): String • equals hashCode property
- 37. VALUE OBJECT • Integer • BigDecimal • String • Color • Date / TimePoint • Status (OPEN / PROGRESS / CLOSED)
- 38. VALUE OBJ. • • • Immutable • Flyweight
- 39. SERVICE • E VO • E VO Service • E VO •
- 40. SERVICE • • (UL) • • →
- 41. • E / VO • E / VO • E / VO • Transaction Script •
- 42. • Infrastructure Service ( ) • E-mail • • Application Service • Excel export • • Domain Service • •
- 43. MODULE • •
- 44. Java package • • 1 •
- 45. MVC • com.example.foobar •com.example.foobar • model • foo • FooModel • FooModel • BarModel • FooView • view UL • FooController • FooView • bar • BarView • BarModel • controller • BarView • FooController • BarController • BarController
- 46. MVC • com.example.foobar •com.example.foobar • model • foo • FooModel • FooModel • BarModel • FooView • view UL • FooController • FooView • bar • BarView • BarModel • controller • BarView • FooController • BarController • BarController
- 47. §3 LifeCycle • Object • new GC • INSERT DELETE •
- 48. §3 LifeCycle
- 49. E • LifeCycle Object LifeCycle • User • JVM
- 50. AGGREGATE • • …
- 51. • • Table • Column Entity • Column Table • ObjColumn → Table
- 52. FACTORY • • • new • Object Object •
- 53. • Obj. • Object LifeCycle • • Object
- 54. Obj. • • Obj. • Obj. • Factory Obj.
- 55. REPOSITORY • • • • • Repository
- 56. • Entity LifeCycle • LC Entity • new • On Memory Collection • Database
- 57. Repos. Collection • DB • Repository Collection • store / delete / find (resolve) ...
- 58. Declaration & Reference CREATE TABLE FOOBAR ( FOO INTEGER, BAR VARCHAR(32), Decl. = Entity PRIMARY KEY (FOO), FOREIGN KEY (BAR) Ref. = VO (ID) REFERECE BAZ (QUX) ); Table has-a Column(s) and ... PrimaryKey has-a ColumnReference
- 59. • / • ENTITY / VO / SERVICE • FACTORY / REPOSITRY • DDD