= Lifecycle Methods

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The lifecycle callback methods notify a domain entity about its interaction within the persistence lifecycle.
For example, the entity is notified immediately prior to being persisted, or when it is about to be updated.

The lifecycle callback methods supported by Apache Isis are:

.Lifecycle methods (partial support)
[cols="1m,3a,2m", options="header"]
|===

|Method
|Description
|Event +
equivalent

|created()
|called when an object has just been created using xref:refguide:applib:index/services/factory/FactoryService.adoc[FactoryService#create(..)] or xref:refguide:applib:index/services/repository/RepositoryService.adoc[RepositoryService#detachedEntity(...)]
|xref:refguide:applib:index/events/lifecycle/ObjectCreatedEvent.adoc[ObjectCreatedEvent]

|loaded()
|called when a (persistent) object has just been loaded from the object store.
|xref:refguide:applib:index/events/lifecycle/ObjectLoadedEvent.adoc[ObjectLoadedEvent]

|persisted()
|called when object has just been persisted from the object store.
|xref:refguide:applib:index/events/lifecycle/ObjectPersistedEvent.adoc[ObjectPersistedEvent]

|persisting()
|called when a (not-yet-persistent) object is just about to be persisted from the object store
|xref:refguide:applib:index/events/lifecycle/ObjectPersistingEvent.adoc[ObjectPersistingEvent]

|removing()
|called when a (persistent) object is just about to be deleted from the object store
|xref:refguide:applib:index/events/lifecycle/ObjectRemovingEvent.adoc[ObjectRemovingEvent]

|updated()
|called when a (persistent) object has just been updated in the object store
|xref:refguide:applib:index/events/lifecycle/ObjectUpdatedEvent.adoc[ObjectUpdatedEvent]

|updating()
|called when a (persistent) object is just about to be updated in the object store
|xref:refguide:applib:index/events/lifecycle/ObjectUpdatingEvent.adoc[ObjectUpdatingEvent]

|===

Further discussion on using events and a subscriber (which will result in a more flexible/decoupled design) can be found xref:applib-classes:events.adoc#lifecycle-events[here].

include::lifecycle/created.adoc[leveloffset=+1]
include::lifecycle/loaded.adoc[leveloffset=+1]
include::lifecycle/persisting.adoc[leveloffset=+1]
include::lifecycle/persisted.adoc[leveloffset=+1]
include::lifecycle/updating.adoc[leveloffset=+1]
include::lifecycle/updated.adoc[leveloffset=+1]
include::lifecycle/removing.adoc[leveloffset=+1]
