    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 *      https://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;
    019
    020import java.io.IOException;
    021
    022/**
    023 * FTPConnectionClosedException is used to indicate the premature or unexpected closing of an FTP connection resulting from a
    024 * {@link org.apache.commons.net.ftp.FTPReply#SERVICE_NOT_AVAILABLE FTPReply.SERVICE_NOT_AVAILABLE} response (FTP reply code 421) to a failed FTP command. This
    025 * exception is derived from IOException and therefore may be caught either as an IOException or specifically as an FTPConnectionClosedException.
    026 *
    027 * @see FTP
    028 * @see FTPClient
    029 */
    030public class FTPConnectionClosedException extends IOException {
    031
    032    private static final long serialVersionUID = 3500547241659379952L;
    033
    034    /** Constructs a FTPConnectionClosedException with no message */
    035    public FTPConnectionClosedException() {
    036    }
    037
    038    /**
    039     * Constructs a FTPConnectionClosedException with a specified message.
    040     *
    041     * @param message The message explaining the reason for the exception.
    042     */
    043    public FTPConnectionClosedException(final String message) {
    044        super(message);
    045    }
    046
    047}