EventMessage

Represents a domain event message within the Wow framework's event sourcing architecture.

This interface serves as the base marker for all domain events, providing a comprehensive set of identifiers and metadata necessary for event processing, correlation, and tracking in distributed systems. It combines multiple capability interfaces to provide a complete event representation.

The EventMessage is the fundamental unit of state change in the event sourcing paradigm. Each event represents a fact that has happened in the domain, and together they form an immutable sequence of state changes for aggregates.

Inherited Capabilities

The interface extends multiple capability interfaces, each serving a specific purpose:

• NamedBoundedContextMessage: Identifies the bounded context that produced this event

• CommandId: Correlates the event with the command that triggered it

• NamedAggregate: Identifies the aggregate type that this event belongs to

• Version: Tracks the aggregate's version after applying this event

• AggregateIdCapable: Identifies the specific aggregate instance

• OwnerId: Tracks the owner who created/modified this event

• SpaceIdCapable: Supports namespace-based data layering within tenant context

Usage Example

data class OrderCreatedEvent(
    override val aggregateId: String,
    override val aggregateVersion: Int,
    override val commandId: String,
    override val tenantId: String,
    override val ownerId: String,
    override val spaceId: String,
    val orderId: String,
    val customerId: String,
    val totalAmount: BigDecimal
) : EventMessage<OrderCreatedEvent, OrderCreated>

interface OrderCreated

Type Parameters

See also

Inheritors