1 // ========================================================================
2 // Copyright (c) 2006-2011 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // All rights reserved. This program and the accompanying materials
5 // are made available under the terms of the Eclipse Public License v1.0
6 // and Apache License v2.0 which accompanies this distribution.
7 // The Eclipse Public License is available at
8 // http://www.eclipse.org/legal/epl-v10.html
9 // The Apache License v2.0 is available at
10 // http://www.opensource.org/licenses/apache2.0.php
11 // You may elect to redistribute this code under either of these licenses.
12 // ========================================================================
13 package org.eclipse.jetty.osgi.equinoxtools.console;
14
15 import java.io.IOException;
16 import java.io.Writer;
17 import java.util.ArrayList;
18 import java.util.List;
19
20 /**
21 * Can be set with a listener that is called back right after the flush method is called.
22 */
23 public class WebConsoleWriterOutputStream extends org.eclipse.jetty.io.WriterOutputStream
24 {
25
26 /**
27 * Interface called back after the outputstream is flushed.
28 */
29 public interface OnFlushListener
30 {
31 /**
32 * Called right after the flush method on the output stream has been executed.
33 */
34 public void onFlush();
35
36 }
37
38 public interface MessageBroadcaster
39 {
40 public void broadcast();
41 }
42
43 private List<OnFlushListener> _callBacks;
44
45 public WebConsoleWriterOutputStream(Writer writer, String encoding)
46 {
47 super(writer, encoding);
48 }
49
50 @Override
51 public synchronized void flush() throws IOException
52 {
53 super.flush();
54 if (_callBacks != null)
55 {
56 for (OnFlushListener listener : _callBacks)
57 {
58 listener.onFlush();
59 }
60 }
61 }
62
63 public synchronized void addOnFlushListener(OnFlushListener callback)
64 {
65 if (_callBacks == null)
66 {
67 _callBacks = new ArrayList<WebConsoleWriterOutputStream.OnFlushListener>();
68 }
69 if (!_callBacks.contains(callback))
70 {
71 _callBacks.add(callback);
72 }
73 }
74 public synchronized boolean removeOnFlushListener(OnFlushListener callback)
75 {
76 if (_callBacks != null)
77 {
78 return _callBacks.remove(callback);
79 }
80 return false;
81 }
82 public synchronized List<OnFlushListener> getOnFlushListeners()
83 {
84 return _callBacks;
85 }
86
87 }