Domain Service

Kind: pattern

Layer: Domain Modeling

Record: architecture:domain-service

Severity: contextual

Scope: domain, behavior, coordination

Canonical: Ontology

A design pattern that places a domain rule spanning several entities in a stateless service named in the domain's language.

Listed in Architecture principles, after Entity and before Runtime Discovery.

Requires

• Domain Model

Reinforces

• Single Responsibility Principle (SRP)
• Ubiquitous Language

Enables

• Cross-Entity Domain Logic

Conflicts with

• Fat Controller
• Transaction Script Sprawl

In tension with

• Aggregate

Tensions

• Domain Service / Aggregate

Violated by

• Fat Controller

Severity

• contextual

Category

• Domain Architecture

Refactors

• God Object

Linked from

• Anti-patterns
• Domain Architecture
• Core Modular Design
• Schema / Canonical Data / Semantics
• Domain Architecture
• Severity levels
• The resolutions