/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2009 RSSOwl Development Team **
** http://www.rssowl.org/ **
** **
** All rights reserved **
** **
** This program and the accompanying materials are made available under **
** the terms of the Eclipse Public License v1.0 which accompanies this **
** distribution, and is available at: **
** http://www.rssowl.org/legal/epl-v10.html **
** **
** A copy is found in the file epl-v10.html and important notices to the **
** license from the team is found in the textfile LICENSE.txt distributed **
** in this package. **
** **
** This copyright notice MUST APPEAR in all copies of the file! **
** **
** Contributors: **
** RSSOwl Development Team - initial API and implementation **
** **
** ********************************************************************** */
package org.rssowl.core.persist.service;
import org.rssowl.core.internal.persist.search.ModelSearchImpl;
import org.rssowl.core.persist.dao.DAOService;
import org.rssowl.core.util.ExtensionUtils;
import org.rssowl.core.util.LongOperationMonitor;
/**
* <p>
* The <code>AbstractPersistenceService</code> is a contributable class that
* handles addition, update, deletion and search of the various Model Types in
* the application.
* </p>
* <p>
* Contributors have to implement the Methods startup() and shutdown(), but may
* chose to leave the others as provided in this abstract class. This default
* implementation uses extension-points to lookup ModelDAO and PreferencesDAO.
* </p>
*
* @author bpasero
*/
public abstract class AbstractPersistenceService implements IPersistenceService {
/* ID for ID Generator Contribution */
private static final String MODEL_ID_GENERATOR_EXTENSION_POINT = "org.rssowl.core.IDGenerator"; //$NON-NLS-1$
/* ID for DAO Factory Contribution */
private static final String MODEL_DAO_FACTORY_EXTENSION_POINT = "org.rssowl.core.DAOService"; //$NON-NLS-1$
private volatile IModelSearch fModelSearch;
private volatile IDGenerator fIDGenerator;
private volatile DAOService fDAOService;
protected AbstractPersistenceService() {}
/*
* @see
* org.rssowl.core.persist.service.IPersistenceService#startup(org.rssowl.
* core.util.LongOperationMonitor, boolean, boolean)
*/
public void startup(LongOperationMonitor monitor, boolean emergency, boolean forRestore) throws PersistenceException {
getModelSearch();
getIDGenerator();
getDAOService();
}
/*
* @see org.rssowl.core.model.dao.IPersistenceService#getDAOService()
*/
public DAOService getDAOService() {
if (fDAOService == null)
fDAOService = (DAOService) ExtensionUtils.loadSingletonExecutableExtension(MODEL_DAO_FACTORY_EXTENSION_POINT);
return fDAOService;
}
/*
* @see org.rssowl.core.model.dao.IPersistenceService#getIDGenerator()
*/
public IDGenerator getIDGenerator() {
if (fIDGenerator == null)
fIDGenerator = (IDGenerator) ExtensionUtils.loadSingletonExecutableExtension(MODEL_ID_GENERATOR_EXTENSION_POINT);
return fIDGenerator;
}
/*
* @see org.rssowl.core.model.dao.IPersistenceService#getModelSearch()
*/
public IModelSearch getModelSearch() {
if (fModelSearch == null)
fModelSearch = new ModelSearchImpl();
return fModelSearch;
}
}