spring-boot/me.ahoo.wow.spring.boot/SnapshotQueryBackend

SnapshotQueryBackend

@InternalWowApi

class SnapshotQueryBackend(val bindings: QueryBindings<AggregateType>?, prepare: (AggregateType) -> Unit = {}, indexes: (AggregateType, QueryIndexPlan) -> QueryIndexReport? = null, serves: (AggregateType) -> Boolean = { bindings != null }, store: (AggregateType) -> String? = { null })

The snapshot query backend of the node: the bindings of each aggregate type's backend and storage facts (null when no backend serves the node's snapshots), and, for a backend the host manages, how it prepares an aggregate's storage and manages its x-wow-index indexes and those of its access attributes at startup.

Constructors

SnapshotQueryBackend

constructor(bindings: QueryBindings<AggregateType>?, prepare: (AggregateType) -> Unit = {}, indexes: (AggregateType, QueryIndexPlan) -> QueryIndexReport? = null, serves: (AggregateType) -> Boolean = { bindings != null }, store: (AggregateType) -> String? = { null })

Types

@InternalWowApi

object Companion

Properties

val bindings: QueryBindings<AggregateType>?

val managesIndexes: Boolean

Whether the host manages this backend's indexes; an application's own backend manages its own.

Functions

fun manageIndexes(type: AggregateType, plan: QueryIndexPlan): QueryIndexReport

Manages plan, type's indexes planned on its query model, as the ddl of its store says.

fun prepare(type: AggregateType)

Makes sure type's storage exists, so its facts are the storage's own.

fun serves(type: AggregateType): Boolean

Whether the backend queries type's snapshots: their store has a query backend.

fun storeOf(type: AggregateType): String?

The store type's snapshot queries run on, or null when the host does not know it.