1 /** 2 * JDBM LICENSE v1.00 3 * 4 * Redistribution and use of this software and associated documentation 5 * ("Software"), with or without modification, are permitted provided 6 * that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain copyright 9 * statements and notices. Redistributions must also contain a 10 * copy of this document. 11 * 12 * 2. Redistributions in binary form must reproduce the 13 * above copyright notice, this list of conditions and the 14 * following disclaimer in the documentation and/or other 15 * materials provided with the distribution. 16 * 17 * 3. The name "JDBM" must not be used to endorse or promote 18 * products derived from this Software without prior written 19 * permission of Cees de Groot. For written permission, 20 * please contact cg@cdegroot.com. 21 * 22 * 4. Products derived from this Software may not be called "JDBM" 23 * nor may "JDBM" appear in their names without prior written 24 * permission of Cees de Groot. 25 * 26 * 5. Due credit should be given to the JDBM Project 27 * (http://jdbm.sourceforge.net/). 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE JDBM PROJECT AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 31 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 32 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 33 * CEES DE GROOT OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 34 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 35 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 36 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 40 * OF THE POSSIBILITY OF SUCH DAMAGE. 41 * 42 * Copyright 2000 (C) Cees de Groot. All Rights Reserved. 43 * Contributions are Copyright (C) 2000 by their associated contributors. 44 * 45 * $Id: CachePolicyListener.java,v 1.3 2003/11/01 13:25:41 dranatunga Exp $ 46 */ 47 48 package jdbm.helper; 49 50 /** 51 * Callback interface between {@link CachePolicy} and a Cache implementation 52 * to notify about cached object eviction. 53 * <p> 54 * Note that <code>CachePolicy</code> implementations typically use 55 * <em>object equality</em> when removing listeners, so concrete 56 * implementations of this interface should also pay attention to 57 * their {@link Object#equals(Object)} and {@link Object#hashCode()} 58 * methods. 59 * 60 * @author <a href="mailto:boisvert@intalio.com">Alex Boisvert</a> 61 * @version $Id: CachePolicyListener.java,v 1.3 2003/11/01 13:25:41 dranatunga Exp $ 62 */ 63 public interface CachePolicyListener { 64 65 /** 66 * Notification that the cache this listener is attached to is evicting 67 * the object indicated. 68 * 69 * @param obj object being evited from cache 70 * @throws CacheEvictionException if this listener encountered problems 71 * while preparing for the specified object's eviction. For example, 72 * a listener may try to persist the object to disk, and encounter 73 * an <code>IOException</code>. 74 */ 75 public void cacheObjectEvicted(Object obj) throws CacheEvictionException; 76 77 }