wow-core/me.ahoo.wow.eventsourcing.snapshot/SnapshotStrategy

SnapshotStrategy

Strategy for managing snapshots of state aggregates. Snapshot strategies determine when and how to create snapshots based on state events. This helps optimize aggregate loading by reducing the number of events that need to be replayed.

Implementations can define custom logic for snapshot creation, such as:

Taking snapshots after a certain number of events
Taking snapshots at specific time intervals
Taking snapshots based on aggregate state changes

Author

ahoo wang

Inheritors

SimpleSnapshotStrategy

NoOp

VersionOffsetSnapshotStrategy

MetricSnapshotStrategy

Types

NoOp

object NoOp : SnapshotStrategy

No-operation implementation of SnapshotStrategy that never creates snapshots. Useful for testing or when snapshots are not needed.

Functions

metrizable

fun SnapshotStrategy.metrizable(): SnapshotStrategy

Wraps a SnapshotStrategy with metrics collection capabilities. Returns a MetricSnapshotStrategy that collects metrics on snapshot strategy operations.

onEvent

abstract fun onEvent(stateEventExchange: StateEventExchange<*>): Mono<Void>

Processes a state event exchange to determine if a snapshot should be created. Implementations should analyze the event and potentially trigger snapshot creation.