Module dk.cloudcreate.essentials.components.eventsourced.aggregates
Package dk.cloudcreate.essentials.components.eventsourced.aggregates.decider

Interface AggregateIdResolver<T,ID>

Type Parameters:
T - The type of object that this resolver support. Could e.g. be a COMMAND, EVENT, Aggregate STATE, VIEW, etc.
ID - The type of Aggregate Id
public interface AggregateIdResolver<T,ID>
Interface responsible for resolve the optional aggregate id associated with the type T
Example of usages:
  • Command - return the aggregate id associated with the command (can return an Optional.empty()) in case server generated id's are used for commands that create a new Aggregate instance)
  • Event - return the aggregate id associated with the event
  • State - return the aggregate id associated with the aggregate state event projection
  • View - return the aggregate id associated with the View event projection

  • Method Summary

    Modifier and Type
    Method
    Description
    Optional<ID>
    resolveFrom(T t)
    Resolve the optional aggregate id associated with the type T
    Example of usages:
    Command - return the aggregate id associated with the command (can return an Optional.empty()) in case server generated id's are used for commands that create a new Aggregate instance) Event - return the aggregate id associated with the event State - return the aggregate id associated with the aggregate state event projection View - return the aggregate id associated with the View event projection

  • Method Details

    • resolveFrom

      Optional<ID> resolveFrom(T t)
      Resolve the optional aggregate id associated with the type T
      Example of usages:
      • Command - return the aggregate id associated with the command (can return an Optional.empty()) in case server generated id's are used for commands that create a new Aggregate instance)
      • Event - return the aggregate id associated with the event
      • State - return the aggregate id associated with the aggregate state event projection
      • View - return the aggregate id associated with the View event projection
      Parameters:
      t - the instance of T
      Returns:
      if the t contains an aggregate id then it MUST be returned in an Optional.of(Object) otherwise an Optional.empty()