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

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

Interface Summary

Interface	Description
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
CommandHandler<COMMAND,EVENT,ERROR>	Command Handler which is responsible for loading any existing Aggregate STATE from the underlying EventStore (see CommandHandler.deciderBasedCommandHandler(ConfigurableEventStore, AggregateType, Class, AggregateIdResolver, AggregateIdResolver, AggregateSnapshotRepository, Class, Decider)) and coordinate persisting any changes to the Aggregate, in the form of EVENT's, to the EventStore as part of an active UnitOfWork (if one exists) The actual logic is delegated to an instance of a Decider
Decider<COMMAND,EVENT,ERROR,STATE>	Variant of the event sourced Decider pattern, which supports building an Aggregate STATE based on previous EVENT's that relate to the aggregate instance, and which can handle COMMAND's, whose side effect is either an ERROR or a List of EVENT's (can be an empty list)
Handler<COMMAND,EVENT,ERROR,STATE>	Decider related interface that is responsible for handling COMMAND(s),whose side effect is either an ERROR or a List of EVENT's (can be an empty list)
HandlerResult<ERROR,EVENT>	Captures that result of calling a Handler.handle(Object, Object) for a specific COMMAND and aggregate STATE Concrete instances can either be of type HandlerResult.Success or type HandlerResult.Error
InitialStateProvider<STATE>	Decider or View related interface, which provides the Initial STATE for a given aggregate/projection/view. The InitialStateProvider works in collaboration with the StateEvolver in the context of the Decider or View pattern
IsStateFinalResolver<STATE>	Decider related interface that resolves if the aggregate's state is final and no more changes can occur, i.e.
StateEvolver<EVENT,STATE>	A Decider or View related interface, which can apply EVENT<(s) to a aggregate/projection/view STATE instance
View<EVENT,STATE>	Variant of the Event Sourced Projection/View concept

Class Summary

Class	Description
HandlerResult.Error<ERROR,EVENT>	Error variant of the HandlerResult
HandlerResult.Success<ERROR,EVENT>	Success variant of the HandlerResult