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        super();
043    }
044
045    /***
046     * Constructs a FTPConnectionClosedException with a specified message.
047     *
048     * @param message  The message explaining the reason for the exception.
049     ***/
050    public FTPConnectionClosedException(String message)
051    {
052        super(message);
053    }
054
055}