blob: b6f6c6415e7625da7eccb664eb15a412284ae766 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
import java.util.LinkedList;
/** The event queue singleton dispatches events received from OpenOffice.org
applications in a thread separate from the AWB main thread.
The queue of event objects, LinkedList<Runnable> The queue object will
also serve as lock for the consumer/producer type synchronization.
*/
class EventQueue
implements Runnable
{
private boolean mbVerbose = false;
private boolean mbHandleDisposingEventsSynchronous = true;
public synchronized static EventQueue Instance ()
{
if (maInstance == null)
maInstance = new EventQueue ();
return maInstance;
}
public void addEvent (Runnable aEvent)
{
synchronized (maMonitor)
{
if (mbVerbose)
System.out.println ("queueing regular event " + aEvent);
maRegularQueue.addLast (aEvent);
maMonitor.notify ();
}
}
public void addDisposingEvent (Runnable aEvent)
{
if (mbHandleDisposingEventsSynchronous)
aEvent.run ();
else
synchronized (maMonitor)
{
if (mbVerbose)
System.out.println ("queueing disposing event " + aEvent);
maDisposingQueue.addLast (aEvent);
maMonitor.notify ();
}
}
private EventQueue ()
{
maRegularQueue = new LinkedList<Runnable>();
maDisposingQueue = new LinkedList<Runnable>();
new Thread(this, "AWB.EventQueue").start();
}
/// This thread's main method: deliver all events
public void run()
{
// in an infinite loop, check for events to deliver, then
// wait on lock (which will be notified when new events arrive)
while( true )
{
Runnable aEvent = null;
do
{
synchronized (maMonitor)
{
if (maDisposingQueue.size() > 0)
{
aEvent = maDisposingQueue.removeFirst();
if (mbVerbose)
System.out.println ("delivering disposing event " + aEvent);
}
else if (maRegularQueue.size() > 0)
{
aEvent = maRegularQueue.removeFirst();
if (mbVerbose)
System.out.println ("delivering regular event " + aEvent);
}
else
aEvent = null;
}
if (aEvent != null)
{
try
{
aEvent.run();
}
catch( Throwable e )
{
System.out.println(
"caught exception during event delivery: " + e );
e.printStackTrace();
}
}
}
while( aEvent != null );
try
{
synchronized (maMonitor)
{
maMonitor.wait();
}
}
catch (Exception e)
{
// can't wait? odd!
System.err.println("Can't wait!");
e.printStackTrace();
}
}
}
private static EventQueue maInstance = null;
private final Object maMonitor = new Object();
private final LinkedList<Runnable> maRegularQueue;
private final LinkedList<Runnable> maDisposingQueue;
}
|
