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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    *      http://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.smtp;
19  
20  import java.io.IOException;
21  
22  /***
23   * SMTPConnectionClosedException is used to indicate the premature or
24   * unexpected closing of an SMTP connection resulting from a
25   * {@link org.apache.commons.net.smtp.SMTPReply#SERVICE_NOT_AVAILABLE SMTPReply.SERVICE_NOT_AVAILABLE }
26   *  response (SMTP reply code 421) to a
27   * failed SMTP command.  This exception is derived from IOException and
28   * therefore may be caught either as an IOException or specifically as an
29   * SMTPConnectionClosedException.
30   * <p>
31   * <p>
32   * @see SMTP
33   * @see SMTPClient
34   ***/
35  
36  public final class SMTPConnectionClosedException extends IOException
37  {
38  
39      private static final long serialVersionUID = 626520434326660627L;
40  
41      /*** Constructs a SMTPConnectionClosedException with no message ***/
42      public SMTPConnectionClosedException()
43      {
44          super();
45      }
46  
47      /***
48       * Constructs a SMTPConnectionClosedException with a specified message.
49       * <p>
50       * @param message  The message explaining the reason for the exception.
51       ***/
52      public SMTPConnectionClosedException(String message)
53      {
54          super(message);
55      }
56  
57  }