Package io.permazen.core

Interface DeleteListener

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface DeleteListener

Listener interface for notifications that an object is about to be deleted.

See Also:

• Transaction.addDeleteListener()

Method Summary

Modifier and Type	Method	Description
void	onDelete(Transaction tx, ObjId id, int[] path, NavigableSet<ObjId> referrers)	Receive notification of an object about to be deleted.

Method Details

onDelete

void onDelete(Transaction tx,
 ObjId id,
 int[] path,
 NavigableSet<ObjId> referrers)

Receive notification of an object about to be deleted.

Notifications are delivered in the same thread that is deleting the object, before the delete actually occurs. At most one notification will be delivered for any object, even if Transaction.delete() is invoked reentrantly from within this listener.

Parameters:

tx - associated transaction

id - the ID of the object about to be deleted

path - path of reference fields (represented by storage IDs) that lead to id

referrers - all objects that (indirectly) refer to the affected object via the path