scheduledcollectionaction.java

人力资源管理系统 系统把几乎所有与人力资源相关的数据统一管理

//$Id: ScheduledCollectionAction.java,v 1.7.2.8 2003/12/27 07:16:00 oneovthafew Exp $
package net.sf.hibernate.impl;

import java.io.Serializable;

import net.sf.hibernate.cache.CacheException;
import net.sf.hibernate.cache.CacheConcurrencyStrategy.SoftLock;
import net.sf.hibernate.collection.CollectionPersister;
import net.sf.hibernate.engine.SessionImplementor;
import net.sf.hibernate.impl.SessionImpl.Executable;

abstract class ScheduledCollectionAction implements Executable {
	
	private final CollectionPersister persister;
	private final Serializable id;
	private final SessionImplementor session;
	private SoftLock lock;
	
	public ScheduledCollectionAction(CollectionPersister persister, Serializable id, SessionImplementor session) 
	throws CacheException {
		this.persister = persister;
		this.session = session;
		this.id = id;
	}
	
	public void afterTransactionCompletion(boolean success) throws CacheException {
		if ( persister.hasCache() ) persister.getCache().release(id, lock);
	}
	
	public Serializable[] getPropertySpaces() {
		return new Serializable[] { persister.getCollectionSpace() };
	}

	protected final CollectionPersister getPersister() {
		return persister;
	}

	protected final Serializable getId() {
		return id;
	}

	protected final SessionImplementor getSession() {
		return session;
	}
	
	public final void beforeExecutions() throws CacheException {
		// we need to obtain the lock before any actions are 
		// executed, since this may be an inverse="true"
		// bidirectional association and it is one of the
		// earlier entity actions which actually updates
		// the database (this action is resposible for
		// second-level cache invalidation only)
		if ( persister.hasCache() ) lock = persister.getCache().lock(id);
	}
	
	protected final void evict() throws CacheException {
		if ( persister.hasCache() ) persister.getCache().evict(id);
	}
	
}