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Akka.NETIWriteEventAdapter Interface

Facility to convert to specialised data models, as may be required by specialized persistence Journals.

Typical use cases include (but are not limited to):

- adding metadata, a.k.a. "tagging" - by wrapping objects into tagged counterparts

- manually converting to the Journals storage format, such as JSON, BSON or any specialised binary format

- splitting up large events into sequences of smaller ones

Namespace:  Akka.Persistence.Journal
Assembly:  Akka.Persistence (in Akka.Persistence.dll) Version: 1.2.0.34 (1.2.0.34)
Syntax
public interface IWriteEventAdapter

The IWriteEventAdapter type exposes the following members.

Methods
  NameDescription
Public methodManifest
Return the manifest (type hint) that will be provided in the [!:FromJournal] method. Use empty string if not needed.
Public methodToJournal

Convert domain event to journal event type.

Some journal may require a specific type to be returned to them, for example if a primary key has to be associated with each event then a journal may require adapters to return "EventWithPrimaryKey(event, key)".

The ToJournal(Object) adaptation must be an 1-to-1 transformation. It is not allowed to drop incoming events during the `toJournal` adaptation.

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