/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.loader;
import com.caucho.util.L10N;
import java.lang.ref.WeakReference;
import java.util.logging.Logger;
/**
* Waits for the close event and calls a destroy() method.
*/
public class WeakLoaderListener implements ClassLoaderListener {
private static final L10N L = new L10N(CloseListener.class);
private static final Logger log
= Logger.getLogger(CloseListener.class.getName());
private WeakReference<ClassLoaderListener> _listenerRef;
/**
* Creates the new close listener.
*
* @param resource the resource which needs closing
*/
public WeakLoaderListener(ClassLoaderListener listener)
{
_listenerRef = new WeakReference<ClassLoaderListener>(listener);
}
/**
* Handles the case where a class loader is activated.
*/
public void classLoaderInit(DynamicClassLoader loader)
{
ClassLoaderListener listener = _listenerRef.get();
if (listener != null)
listener.classLoaderInit(loader);
}
/**
* Handles the case where a class loader is dropped.
*/
public void classLoaderDestroy(DynamicClassLoader loader)
{
ClassLoaderListener listener = _listenerRef.get();
if (listener != null)
listener.classLoaderDestroy(loader);
}
}