io.micronaut.data.event

Interface EntityEventListener<T>

Type Parameters:

T - the entity type

All Superinterfaces:

java.util.EventListener, io.micronaut.core.order.Ordered

All Known Subinterfaces:

PostPersistEventListener<T>, PostRemoveEventListener<T>, PostUpdateEventListener<T>, PrePersistEventListener<T>, PreRemoveEventListener<T>, PreUpdateEventListener<T>

All Known Implementing Classes:

AnnotatedMethodInvokingEntityEventListener, AutoPopulatedEntityEventListener, AutoTimestampEntityEventListener, EntityEventRegistry, UUIDGeneratingEntityEventListener

@Indexed(value=EntityEventListener.class)
public interface EntityEventListener<T>
extends java.util.EventListener, io.micronaut.core.order.Ordered

The interface representing an entity event listener.

Event listeners are able to listen for persistence events through the various method hooks provided. The supports(RuntimePersistentEntity, Class) method can be used to narrow applicable entities and should be called by implementors prior to invoking one of the event methods.

Note that EntityEventListener added by the user SHOULD NOT be annotated with Primary.

Since:

2.3.0

Author:

graemerocher, Denis Stepanov

Field Summary

Fields

Modifier and Type	Field and Description
static EntityEventListener<java.lang.Object>	NOOP A no-op event listener that does nothing.

Fields inherited from interface io.micronaut.core.order.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Method Summary

Modifier and Type	Method and Description
default void	postLoad(EntityEventContext<T> context) A post-load hook.
default void	postPersist(EntityEventContext<T> context) A post-persist hook.
default void	postRemove(EntityEventContext<T> context) A post-remove hook.
default void	postUpdate(EntityEventContext<T> context) A post-update hook.
default boolean	prePersist(EntityEventContext<T> context) A pre-persist hook.
default boolean	preQuery(QueryEventContext<T> context) A pre-update hook.
default boolean	preRemove(EntityEventContext<T> context) A pre-remove hook.
default boolean	preUpdate(EntityEventContext<T> context) A pre-update hook.
default boolean	supports(RuntimePersistentEntity<T> entity, java.lang.Class<? extends java.lang.annotation.Annotation> eventType) Allows including or excluding a listener for a specific entity.

Methods inherited from interface io.micronaut.core.order.Ordered

getOrder

Field Detail

NOOP

static final EntityEventListener<java.lang.Object> NOOP

A no-op event listener that does nothing.

Method Detail

supports

default boolean supports(RuntimePersistentEntity<T> entity,
                         java.lang.Class<? extends java.lang.annotation.Annotation> eventType)

Allows including or excluding a listener for a specific entity.

Parameters:

entity - The entity

eventType - The event type

Returns:

True if it is supported

prePersist

default boolean prePersist(@NonNull
                           EntityEventContext<T> context)

A pre-persist hook. Implementors can return false to evict the operation.

Parameters:

context - The context object

Returns:

A boolean value indicating whether to proceed with the operation.

postPersist

default void postPersist(@NonNull
                         EntityEventContext<T> context)

A post-persist hook. Executed once the object has been persisted.

Parameters:

context - The context object

postLoad

default void postLoad(@NonNull
                      EntityEventContext<T> context)

A post-load hook. Executed once the object has been persisted.

Parameters:

context - The context object

preRemove

default boolean preRemove(@NonNull
                          EntityEventContext<T> context)

A pre-remove hook. Implementors can return false to evict the operation.

Parameters:

context - The context object

Returns:

A boolean value indicating whether to proceed with the operation.

postRemove

default void postRemove(@NonNull
                        EntityEventContext<T> context)

A post-remove hook. Executed once the object has been removed.

Parameters:

context - The context object

preUpdate

default boolean preUpdate(@NonNull
                          EntityEventContext<T> context)

A pre-update hook. Implementors can return false to evict the operation.

Parameters:

context - The context object

Returns:

A boolean value indicating whether to proceed with the operation.

preQuery

default boolean preQuery(@NonNull
                         QueryEventContext<T> context)

A pre-update hook. Implementors can return false to evict the operation.

Parameters:

context - The context object

Returns:

A boolean value indicating whether to proceed with the operation.

postUpdate

default void postUpdate(@NonNull
                        EntityEventContext<T> context)

A post-update hook. Executed once the object has been updated.

Parameters:

context - The context object