001/*
002 * This library is part of OpenCms -
003 * The Open Source Content Management System
004 *
005 * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * For further information about Alkacon Software GmbH & Co. KG, please see the
018 * company website: https://www.alkacon.com
019 *
020 * For further information about OpenCms, please see the
021 * project website: https://www.opencms.org
022 *
023 * You should have received a copy of the GNU Lesser General Public
024 * License along with this library; if not, write to the Free Software
025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
026 */
027
028package org.opencms.loader;
029
030import java.io.IOException;
031
032/**
033 * Signals that an image cache entry disappeared after it had already been found locally.<p>
034 *
035 * External image caches use this exception to distinguish a stale local metadata entry from other storage errors.
036 * The image loader can then regenerate the derivative and retry its delivery once. Streaming methods must raise this
037 * exception before writing content to the supplied output stream.<p>
038 */
039public class CmsImageCacheEntryNotFoundException extends IOException {
040
041    /** Serial version id. */
042    private static final long serialVersionUID = 1L;
043
044    /**
045     * Creates a new exception.<p>
046     *
047     * @param key the missing image cache key
048     */
049    public CmsImageCacheEntryNotFoundException(String key) {
050
051        super("Image cache entry not found: " + key);
052    }
053
054    /**
055     * Creates a new exception.<p>
056     *
057     * @param key the missing image cache key
058     * @param cause the root cause
059     */
060    public CmsImageCacheEntryNotFoundException(String key, Throwable cause) {
061
062        super("Image cache entry not found: " + key, cause);
063    }
064}