Nawa za ka bayyana iyakat sabis ta amfani da DDD jigon hudu hannu?

Question

Accepted Answer

Kyakkyawan iyakar sabis za su bi **iya aiki ta kasua**, ba yankoki teknik ba. **Domain-Driven Design (DDD)** yana ba da kayan aiki mai inganci don haka: **jigon hudu hannu** — wani yanki jaji a ciki da karon jagora da shartunansa suke daidai.

## Jigon hudu hannu

Kasuwar "Customer" na iya nufin abubuwa daban-daban a jigogi daban-daban. Kowane jigon hudu hannu yana mallaki nufin nasa kasuwa, kuma sabis na yau da kullun yana zama ga jigo gida.

```text
┌───────────────────┐   ┌────────────────────┐
│  Sales context    │   │  Support context   │
│  Customer =       │   │  Customer =        │
│   leads, orders   │   │   tickets, SLAs    │
└───────────────────┘   └────────────────────┘
   one service             another service
```

## Nawa za ka gani iyakar

- **Daidaita ga iya aiki ta kasua** (Umarnin, Kuɗin, Jigilar raye), ba sunan kasua ba ko tebur na DB.
- **Damun jari a cikin, sauri ɗanɗano koli fili** iyaka.
- Kula inda **yarukan jiya na jiya** ya canza — wanda yake kasancewar yankin gefen jigo.
- Yi amfani da **taswira jigo** don yin gida abubuwa (bisa/bisa).

## Ƙara-ƙara

```text
✗ Entity services ("User service", "Product service") — too fine, chatty
✗ Splitting by technical layer (a "database service")
✗ Boundaries that force a distributed transaction for every operation
```

Idan sabis biyu sai suka kira juna don kammala wata aiki, iyaka tabbas ba daidai ba.

## Me take mahimmanci

Iyakar da aka yanke da wuri zai zama mai tsada a sauye a gida, saboda suka tabbata a cikin APIs da gabado-gadoji waɗanda wasu ƙungiya suke dogaro.

DDD jigon hudu hannu yana ba ka hanyar da ke da inganci don jija waɗannan layi jiya jiya ga aiki, saboda sabis suka kasance da damun jari da kuma zasu iya samun yama cikin banjaren kafin sai suke ba da shawara daidai-daidai.