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 * <p>
030 * <p>
031 * @see FTP
032 * @see FTPClient
033 ***/
034
035public class FTPConnectionClosedException extends IOException
036{
037
038    private static final long serialVersionUID = 3500547241659379952L;
039
040    /*** Constructs a FTPConnectionClosedException with no message ***/
041    public FTPConnectionClosedException()
042    {
043        super();
044    }
045
046    /***
047     * Constructs a FTPConnectionClosedException with a specified message.
048     * <p>
049     * @param message  The message explaining the reason for the exception.
050     ***/
051    public FTPConnectionClosedException(String message)
052    {
053        super(message);
054    }
055
056}