Aggregates

Aggregates are a core concept in Domain-Driven Design (DDD) and event sourcing. Arc provides seamless integration with Chronicle's aggregate roots, offering automatic dependency injection and event tracking.

What are Aggregates?

An aggregate is a cluster of domain objects that can be treated as a single unit. The aggregate root is the entry point to the aggregate and ensures the consistency of changes within the aggregate boundary.

Key Features

• Automatic Registration: Aggregate roots are automatically discovered and registered in the dependency injection container
• Event Source ID Resolution: Automatic resolution of aggregate instances based on the event source ID from command context
• Change Tracking: Automatic tracking of changes and events generated by aggregate roots
• Transient Lifecycle: Each request gets a fresh instance tied to a specific event source ID

Topics

• Aggregate Roots - How to use aggregate roots with dependency injection and event sourcing
• Aggregate Root - Defining and implementing aggregate roots