Interface WriteEventAdapter

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      java.lang.String manifest​(java.lang.Object event)
      Return the manifest (type hint) that will be provided in the fromJournal method.
      java.lang.Object toJournal​(java.lang.Object event)
      Convert domain event to journal event type.
    • Method Detail

      • manifest

        java.lang.String manifest​(java.lang.Object event)
        Return the manifest (type hint) that will be provided in the fromJournal method. Use "" if manifest is not needed.
      • toJournal

        java.lang.Object toJournal​(java.lang.Object event)
        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 com.example.myjournal.EventWithPrimaryKey(event, key).

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

        Parameters:
        event - the application-side domain event to be adapted to the journal model
        Returns:
        the adapted event object, possibly the same object if no adaptation was performed