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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.echo;
19  
20  import java.io.InputStream;
21  
22  import org.apache.commons.net.discard.DiscardTCPClient;
23  
24  /***
25   * The EchoTCPClient class is a TCP implementation of a client for the
26   * Echo protocol described in RFC 862.  To use the class, merely
27   * establish a connection with
28   * {@link org.apache.commons.net.SocketClient#connect  connect }
29   * and call {@link DiscardTCPClient#getOutputStream  getOutputStream() } to
30   * retrieve the echo output stream and
31   * {@link #getInputStream getInputStream() }
32   *  to get the echo input stream.
33   * Don't close either stream when you're done using them.  Rather, call
34   * {@link org.apache.commons.net.SocketClient#disconnect  disconnect }
35   * to clean up properly.
36   *
37   * @see EchoUDPClient
38   * @see DiscardTCPClient
39   ***/
40  
41  public final class EchoTCPClient extends DiscardTCPClient
42  {
43      /*** The default echo port.  It is set to 7 according to RFC 862. ***/
44      public static final int DEFAULT_PORT = 7;
45  
46      /***
47       * The default EchoTCPClient constructor.  It merely sets the default
48       * port to <code> DEFAULT_PORT </code>.
49       ***/
50      public EchoTCPClient ()
51      {
52          setDefaultPort(DEFAULT_PORT);
53      }
54  
55      /***
56       * Returns an InputStream from which you may read echoed data from
57       * the server.  You should NOT close the InputStream when you're finished
58       * reading from it.  Rather, you should call
59       * {@link org.apache.commons.net.SocketClient#disconnect  disconnect }
60       * to clean up properly.
61       *
62       * @return An InputStream from which you can read echoed data from the
63       *         server.
64       ***/
65      public InputStream getInputStream()
66      {
67          return _input_;
68      }
69  
70  }