1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.net.ftp;
19
20 import java.io.IOException;
21
22 /**
23 * FTPConnectionClosedException is used to indicate the premature or unexpected closing of an FTP connection resulting from a
24 * {@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
25 * exception is derived from IOException and therefore may be caught either as an IOException or specifically as an FTPConnectionClosedException.
26 *
27 * @see FTP
28 * @see FTPClient
29 */
30 public class FTPConnectionClosedException extends IOException {
31
32 private static final long serialVersionUID = 3500547241659379952L;
33
34 /** Constructs a FTPConnectionClosedException with no message */
35 public FTPConnectionClosedException() {
36 }
37
38 /**
39 * Constructs a FTPConnectionClosedException with a specified message.
40 *
41 * @param message The message explaining the reason for the exception.
42 */
43 public FTPConnectionClosedException(final String message) {
44 super(message);
45 }
46
47 }