Domain Events

Kind: pattern

Layer: Execution Core

Record: architecture:domain-events

Severity: recommended

Scope: domain, bounded context

Canonical: Ontology

A design pattern that records each significant change in the domain as an event named in the domain's language.

Listed in Architecture principles, after Command Query Responsibility Segregation (CQRS) and before Integration Events.

Requires

• Domain Model
• Event Semantics

Reinforces

• Domain-Driven Design (DDD)
• Event-Driven Architecture

Enables

• Decoupled Domain Reactions

Conflicts with

• Infrastructure Events in Domain

In tension with

• Event Granularity

Tensions

• Domain Events / Event Granularity

Violated by

• Infrastructure Events in Domain

Refactored by

• Name the Concept

Severity

• recommended

Category

• Event / Messaging / Asynchronous Architecture

Refactors

• Distributed Monolith
• Circular Dependency
• Independence
• Autonomy
• Microservices

Required by

• Event Sourcing

Linked from

• Execution joins the halves
• Anti-patterns
• Domain Architecture
• Core Modular Design
• Event / Messaging / Asynchronous Architecture
• Codebase / System Architecture Styles
• Core Vocabulary
• Event Messaging Async
• Severity levels
• The resolutions