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

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

Class DelayedAddAndDeleteAggregateSnapshotDelegate

java.lang.Object

dk.cloudcreate.essentials.components.eventsourced.aggregates.snapshot.DelayedAddAndDeleteAggregateSnapshotDelegate

All Implemented Interfaces:

AggregateSnapshotRepository

public class DelayedAddAndDeleteAggregateSnapshotDelegate
extends Object
implements AggregateSnapshotRepository

Delegating AggregateSnapshotRepository which directly delegates all operations to the provided delegateRepository, except for AggregateSnapshotRepository.aggregateUpdated(Object, AggregateEventStream), AggregateSnapshotRepository.deleteSnapshots(AggregateType, Object, Class, List), which are performed asynchronously in the background.
This ensures that expensive update/clean-up for aggregate snapshots in the database don't affect aggregate persistence performance.

Constructor Summary

Constructors

Constructor	Description
DelayedAddAndDeleteAggregateSnapshotDelegate(AggregateSnapshotRepository delegateRepository)

Method Summary

Modifier and Type	Method	Description
<ID,AGGREGATE_IMPL_TYPE> void	aggregateUpdated(AGGREGATE_IMPL_TYPE aggregate, dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateEventStream<ID> persistedEvents)	Callback from an Aggregate Repository to notify that the aggregate has been updated
static AggregateSnapshotRepository	delegateTo(AggregateSnapshotRepository delegateRepository)
<AGGREGATE_IMPL_TYPE> void	deleteAllSnapshots(Class<AGGREGATE_IMPL_TYPE> ofAggregateImplementationType)	Delete all snapshots for the given aggregate implementation type
<ID,AGGREGATE_IMPL_TYPE> void	deleteSnapshots(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType, ID aggregateId, Class<AGGREGATE_IMPL_TYPE> withAggregateImplementationType)	Delete all snapshots for the given aggregate instance with the given aggregate implementation type
<ID,AGGREGATE_IMPL_TYPE> void	deleteSnapshots(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType, ID aggregateId, Class<AGGREGATE_IMPL_TYPE> withAggregateImplementationType, List<dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.types.EventOrder> snapshotEventOrdersToDelete)	Delete all snapshots with a given AggregateSnapshot.eventOrderOfLastIncludedEvent for the given aggregate instance, with the given aggregate implementation type
<ID,AGGREGATE_IMPL_TYPE> List<AggregateSnapshot<ID,AGGREGATE_IMPL_TYPE>>	loadAllSnapshots(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType, ID aggregateId, Class<AGGREGATE_IMPL_TYPE> aggregateImplType, boolean includeSnapshotPayload)	Load all AggregateSnapshot's related to the given aggregate instance
<ID,AGGREGATE_IMPL_TYPE> Optional<AggregateSnapshot<ID,AGGREGATE_IMPL_TYPE>>	loadSnapshot(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType, ID aggregateId, dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.types.EventOrder withLastIncludedEventOrderLessThanOrEqualTo, Class<AGGREGATE_IMPL_TYPE> aggregateImplType)
<ID,AGGREGATE_IMPL_TYPE> Optional<AggregateSnapshot<ID,AGGREGATE_IMPL_TYPE>>	loadSnapshot(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType, ID aggregateId, Class<AGGREGATE_IMPL_TYPE> aggregateImplType)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DelayedAddAndDeleteAggregateSnapshotDelegate

public DelayedAddAndDeleteAggregateSnapshotDelegate(AggregateSnapshotRepository delegateRepository)

Method Detail

delegateTo

public static AggregateSnapshotRepository delegateTo(AggregateSnapshotRepository delegateRepository)

loadSnapshot

public <ID,AGGREGATE_IMPL_TYPE> Optional<AggregateSnapshot<ID,AGGREGATE_IMPL_TYPE>> loadSnapshot(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType,
                                                                                                             ID aggregateId,
                                                                                                             Class<AGGREGATE_IMPL_TYPE> aggregateImplType)

Specified by:

loadSnapshot in interface AggregateSnapshotRepository

Type Parameters:

ID - the aggregate ID type

AGGREGATE_IMPL_TYPE - the concrete aggregate implementation type

Parameters:

aggregateType - the aggregate type (determining the aggregate's event stream name)

aggregateId - the identifier for the aggregate instance

aggregateImplType - the concrete aggregate implementation type

Returns:

the aggregate snapshot wrapped in an Optional if a snapshot was found, otherwise Optional.empty()

loadSnapshot

public <ID,AGGREGATE_IMPL_TYPE> Optional<AggregateSnapshot<ID,AGGREGATE_IMPL_TYPE>> loadSnapshot(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType,
                                                                                                             ID aggregateId,
                                                                                                             dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.types.EventOrder withLastIncludedEventOrderLessThanOrEqualTo,
                                                                                                             Class<AGGREGATE_IMPL_TYPE> aggregateImplType)

Specified by:

loadSnapshot in interface AggregateSnapshotRepository

Type Parameters:

ID - the aggregate ID type

AGGREGATE_IMPL_TYPE - the concrete aggregate implementation type

Parameters:

aggregateType - the aggregate type (determining the aggregate's event stream name)

aggregateId - the identifier for the aggregate instance

withLastIncludedEventOrderLessThanOrEqualTo - the snapshot returned must have AggregateSnapshot.eventOrderOfLastIncludedEvent that is less than or equal to this value

aggregateImplType - the concrete aggregate implementation type

Returns:

the aggregate snapshot wrapped in an Optional if a snapshot was found, otherwise Optional.empty()

loadAllSnapshots

public <ID,AGGREGATE_IMPL_TYPE> List<AggregateSnapshot<ID,AGGREGATE_IMPL_TYPE>> loadAllSnapshots(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType,
                                                                                                             ID aggregateId,
                                                                                                             Class<AGGREGATE_IMPL_TYPE> aggregateImplType,
                                                                                                             boolean includeSnapshotPayload)

Description copied from interface: AggregateSnapshotRepository

Load all AggregateSnapshot's related to the given aggregate instance

Specified by:

loadAllSnapshots in interface AggregateSnapshotRepository

Type Parameters:

ID - the aggregate ID type

AGGREGATE_IMPL_TYPE - the concrete aggregate implementation type

Parameters:

aggregateType - the aggregate type (determining the aggregate's event stream name)

aggregateId - the identifier for the aggregate instance

aggregateImplType - the concrete aggregate implementation type

includeSnapshotPayload - should the AggregateSnapshot.aggregateSnapshot be loaded?

Returns:

list of all AggregateSnapshot's in ascending AggregateSnapshot.eventOrderOfLastIncludedEvent order (the oldest snapshot first) related to the given aggregate instance

aggregateUpdated

public <ID,AGGREGATE_IMPL_TYPE> void aggregateUpdated(AGGREGATE_IMPL_TYPE aggregate,
                                                            dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateEventStream<ID> persistedEvents)

Description copied from interface: AggregateSnapshotRepository

Callback from an Aggregate Repository to notify that the aggregate has been updated

Specified by:

aggregateUpdated in interface AggregateSnapshotRepository

Type Parameters:

ID - the aggregate ID type

AGGREGATE_IMPL_TYPE - the concrete aggregate implementation type

Parameters:

aggregate - the aggregate instance after the changes (in the form of events) has been marked as committed within the aggregate

persistedEvents - the aggregate changes (in the form of events) after they've been persisted

deleteAllSnapshots

public <AGGREGATE_IMPL_TYPE> void deleteAllSnapshots(Class<AGGREGATE_IMPL_TYPE> ofAggregateImplementationType)

Description copied from interface: AggregateSnapshotRepository

Delete all snapshots for the given aggregate implementation type

Specified by:

deleteAllSnapshots in interface AggregateSnapshotRepository

Type Parameters:

AGGREGATE_IMPL_TYPE - the concrete aggregate implementation type

Parameters:

ofAggregateImplementationType - the concrete aggregate implementation type that we want to delete all snapshots for

deleteSnapshots

public <ID,AGGREGATE_IMPL_TYPE> void deleteSnapshots(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType,
                                                           ID aggregateId,
                                                           Class<AGGREGATE_IMPL_TYPE> withAggregateImplementationType)

Description copied from interface: AggregateSnapshotRepository

Delete all snapshots for the given aggregate instance with the given aggregate implementation type

Specified by:

deleteSnapshots in interface AggregateSnapshotRepository

Type Parameters:

ID - the aggregate ID type

AGGREGATE_IMPL_TYPE - the concrete aggregate implementation type

Parameters:

aggregateType - the aggregate type (determining the aggregate's event stream name)

aggregateId - the id of the aggregate that we want to delete all snapshots for

withAggregateImplementationType - the concrete aggregate implementation type that we want to delete all snapshots for

deleteSnapshots

public <ID,AGGREGATE_IMPL_TYPE> void deleteSnapshots(dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.eventstream.AggregateType aggregateType,
                                                           ID aggregateId,
                                                           Class<AGGREGATE_IMPL_TYPE> withAggregateImplementationType,
                                                           List<dk.cloudcreate.essentials.components.eventsourced.eventstore.postgresql.types.EventOrder> snapshotEventOrdersToDelete)

Description copied from interface: AggregateSnapshotRepository

Delete all snapshots with a given AggregateSnapshot.eventOrderOfLastIncludedEvent for the given aggregate instance, with the given aggregate implementation type

Specified by:

deleteSnapshots in interface AggregateSnapshotRepository

Type Parameters:

ID - the aggregate ID type

AGGREGATE_IMPL_TYPE - the concrete aggregate implementation type

Parameters:

aggregateType - the aggregate type (determining the aggregate's event stream name)

aggregateId - the id of the aggregate that we want to delete all snapshots for

withAggregateImplementationType - the concrete aggregate implementation type that we want to delete all snapshots for

snapshotEventOrdersToDelete - The list of AggregateSnapshot.eventOrderOfLastIncludedEvent 's that should be deleted