ch.elca.el4j.services.persistence.generic.dao
Interface DaoChangeNotifier

All Known Implementing Classes:

DefaultDaoChangeNotifier

public interface DaoChangeNotifier

Notifies registered observers of DAO changes. The notifications sent are consistent.

Author:

Adrian Moos (AMS)

File-location:

DaoChangeNotifier

Last check-in date:

2009-08-04 14:25:40 +0200 (Di, 04. Aug 2009) by swismer for revision 3874

Nested Class Summary

static class	DaoChangeNotifier.Change Sent if something in this DAO view may have changed.
static class	DaoChangeNotifier.EntityChange Something about DaoChangeNotifier.EntityChange.m_changee may have changed.
static class	DaoChangeNotifier.EntityDeleted The DaoChangeNotifier.EntityChange.m_changee has been deleted.
static class	DaoChangeNotifier.EntityInserted The DaoChangeNotifier.EntityChange.m_changee has been inserted.
static class	DaoChangeNotifier.EntityStateChanged The DaoChangeNotifier.EntityChange.m_changee's state has changed.
static class	DaoChangeNotifier.NewEntityState The DaoChangeNotifier.EntityChange.m_changee has new state.

Field Summary

static DaoChangeNotifier.Change

FUZZY_CHANGE A fuzzy change object so callers do not have to construct their own.

Method Summary

void	announce(DaoChangeNotifier.Change change) Announces change to all subscribed observers.
void	subscribe(DaoChangeListener cl) Causes cl to receive future change notifications.
void	unsubscribe(DaoChangeListener cl) Causes cl to no longer receive future change notifications.

Field Detail

FUZZY_CHANGE

static final DaoChangeNotifier.Change FUZZY_CHANGE

A fuzzy change object so callers do not have to construct their own.

Method Detail

subscribe

void subscribe(DaoChangeListener cl)

Causes cl to receive future change notifications.

Parameters:

cl - The DaoChangeListener to subscribe

unsubscribe

void unsubscribe(DaoChangeListener cl)

Causes cl to no longer receive future change notifications.

Parameters:

cl - The DaoChangeListener to unsubscribe

announce

void announce(DaoChangeNotifier.Change change)

Announces change to all subscribed observers.

Parameters:

change - The change to announce