Class DomainEvent

Namespace

Opossum.Core

Assembly

Opossum.dll

Envelope that carries a domain event payload (Event) together with its indexing metadata (EventType and Tags).

public record DomainEvent : IEquatable<DomainEvent>

Inheritance

object

DomainEvent

Implements

IEquatable<DomainEvent>

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

You do not need to set EventType manually — when left unassigned it defaults to the simple class name of the inner Event object (e.g. "StudentRegisteredEvent"). Override it only when you want to decouple the stored type name from the CLR class name.

Properties

Event

public required IEvent Event { get; init; }

Property Value

IEvent

EventType

The event type name used for indexing and querying. When not set explicitly, defaults to the simple class name of the inner Event (e.g. "StudentRegisteredEvent"). This makes construction via new DomainEvent { Event = ... } always produce a valid, consistent type name without any manual assignment.

public string EventType { get; init; }

Property Value

string

Remarks

You can still set a custom value (e.g. "StudentRegistered" without the suffix) but it must be consistent between writes (append) and reads (query), because it is what gets stored in the EventType index. It is intentionally decoupled from the $type AQN used for polymorphic deserialization, so namespace renames do not affect query behaviour.

Tags

Tags attached to this event for indexing and querying. Immutable after construction; use IEventStoreMaintenance.AddTagsAsync to add tags retroactively.

public IReadOnlyList<Tag> Tags { get; init; }

Property Value

IReadOnlyList<Tag>