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    
018    package org.apache.commons.net.ftp;
019    import 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    
035    public 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    }