Apa iku Domain-Driven Design (DDD)?

Question

Accepted Answer

**Domain-Driven Design (DDD)** minangka pendekatan kanggo design software sing fokus ing pemodelan software supaya cocog karo **business domain** kanthi cetha — nekanake kolaborasi karo domain experts, basa sing padha, lan domain models lan boundaries sing jelas didefinisikake. Iki luwih berarti kanggo business domains sing kompleks.

## Core ideas of DDD

```text
DDD centers the design on the BUSINESS DOMAIN (the real-world problem):
  ✓ UBIQUITOUS LANGUAGE → a shared, precise vocabulary between developers and domain
    EXPERTS, used consistently in code AND conversation (reduces miscommunication)
  ✓ MODEL the domain → rich domain models reflecting real business concepts/rules (not
    just data structures) — the model captures the business logic
  ✓ collaborate with domain EXPERTS → deeply understand the domain to model it well
```

## Strategic DDD (boundaries)

```text
BOUNDED CONTEXT → divide a large domain into bounded contexts, each with its own model
  and language (a term can mean different things in different contexts) → manage complexity
  → avoids one huge confused model; defines clear boundaries
CONTEXT MAPPING → define relationships/integration between bounded contexts
→ strategic DDD manages large, complex domains by dividing them sensibly
```

## Tactical DDD (building blocks)

```text
ENTITIES → objects with identity (tracked over time); VALUE OBJECTS → defined by attributes
  (no identity); AGGREGATES → clusters of entities with a root (consistency boundary)
REPOSITORIES → access aggregates; DOMAIN SERVICES → domain logic not fitting an entity;
DOMAIN EVENTS → things that happened in the domain
→ tactical patterns to model the domain richly
```

## Apa lha sing penting

Ngerti Domain-Driven Design iku ilmu tingkat senior sing berarti amarga iku **pendekatan sing berpengaruh kanggo atasi business domains sing kompleks** kanthi pemodelan domain sing cetha, dadi penting kanggo design software kanggo domains sing kompleks.

DDD fokus design ing **business domain** — pemodelan software supaya cocog karo real-world problem kanthi cetha — sing berarti kanggo domains kompleks endi business logic dhewe iku tantangan utama.

Ngerti **core ideas** — **ubiquitous language** (vocabulary sing padha lan presisi antara developers lan domain experts sing dikaake konsisten ing code lan conversation, ngurangi miscommunication sing nyisak projects kompleks), **pemodelan domain** sing kaya (domain models sing ngrefleksikake real business concepts lan rules, ora mung data structures, nangkep business logic), lan **kolaborasi karo domain experts** (ngerti domain kanthi jero kanggo pemodelan sing becik) — nangkep filosofi sentral DDD yaiku alignment software karo business.

Ngerti **strategic DDD** — **bounded contexts** (mbagi domain gedhe dadi contexts sing saben-saben duweni model lan basa dheweke, amarga term bisa beda teges ing contexts beda, managing complexity lan ngindari model gedhe tunggal sing bingung) lan context mapping — ngrefleksikake carane DDD atasi domains gedhe lan kompleks kanthi mbagi kanthi becik (konsep berarti sing uga ana hubungane karo microservice boundaries).

Ngerti **tactical DDD** — entities (identity), value objects (didefinisikake karo attributes), aggregates (consistency boundaries karo root), repositories, domain services, lan domain events — nyedhiyakake building blocks kanggo pemodelan domain sing kaya.

DDD berpengaruh kanggo complex business software, nyedhiyakake guidance strategic (boundaries) lan tactical (modeling).

Sumpama DDD iku pendekatan berpengaruh kanggo atasi complex business domains (melalui close domain modeling, ubiquitous language, bounded contexts, lan rich domain models) sing berarti kanggo complex software, lan sumpama ngerti core ideas, strategic boundaries, lan tactical patterns iku penting kanggo design systems domain-complex, ngerti Domain-Driven Design iku valuable senior-level knowledge — pendekatan berpengaruh kanggo complex business domains, nekanake close domain modeling lan clear boundaries (bounded contexts), penting kanggo design software endi business complexity iku tantangan utama, lan ngrefleksikake design sophistication sing dikarepake saka senior developers sing atasi domains kompleks.