    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.net.ftp;
    019import java.io.IOException;
    020
    021/**
    022 * FTPConnectionClosedException is used to indicate the premature or
    023 * unexpected closing of an FTP connection resulting from a
    024 * {@link org.apache.commons.net.ftp.FTPReply#SERVICE_NOT_AVAILABLE FTPReply.SERVICE_NOT_AVAILABLE }
    025 *  response (FTP reply code 421) to a
    026 * failed FTP command.  This exception is derived from IOException and
    027 * therefore may be caught either as an IOException or specifically as an
    028 * FTPConnectionClosedException.
    029 *
    030 * @see FTP
    031 * @see FTPClient
    032 */
    033
    034public class FTPConnectionClosedException extends IOException
    035{
    036
    037    private static final long serialVersionUID = 3500547241659379952L;
    038
    039    /** Constructs a FTPConnectionClosedException with no message */
    040    public FTPConnectionClosedException()
    041    {
    042    }
    043
    044    /**
    045     * Constructs a FTPConnectionClosedException with a specified message.
    046     *
    047     * @param message  The message explaining the reason for the exception.
    048     */
    049    public FTPConnectionClosedException(final String message)
    050    {
    051        super(message);
    052    }
    053
    054}