/* * Copyright (c) 1999, 2001, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package javax.naming; /**  * This exception is thrown when attempting to communicate with a  * directory or naming service and that service is not available.  * It might be unavailable for different reasons. For example,  * the server might be too busy to service the request, or the server  * might not be registered to service any requests, etc.  * <p>  * Synchronization and serialization issues that apply to NamingException  * apply directly here.  *  * @author Rosanna Lee  * @author Scott Seligman  *  * @since 1.3  */ public class ServiceUnavailableException extends NamingException {    /**     * Constructs a new instance of ServiceUnavailableException using an     * explanation. All other fields default to null.     *     * @param   explanation     Possibly null additional detail about this exception.     * @see java.lang.Throwable#getMessage     */    public ServiceUnavailableException(String explanation) {        super(explanation);    }     /**      * Constructs a new instance of ServiceUnavailableException.      * All fields default to null.      */    public ServiceUnavailableException() {        super();    }     /**     * Use serialVersionUID from JNDI 1.1.1 for interoperability     */    private static final long serialVersionUID = -4996964726566773444L;}