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My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

Showing the changes to java/pkg/sun/net/ProgressMonitor.java (1 of 18352 files). Show all

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java/pkg/sun/net/ProgressMonitor.java+257−0
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1+/*
2+ * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
3+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4+ *
5+ * This code is free software; you can redistribute it and/or modify it
6+ * under the terms of the GNU General Public License version 2 only, as
7+ * published by the Free Software Foundation. Oracle designates this
8+ * particular file as subject to the "Classpath" exception as provided
9+ * by Oracle in the LICENSE file that accompanied this code.
10+ *
11+ * This code is distributed in the hope that it will be useful, but WITHOUT
12+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14+ * version 2 for more details (a copy is included in the LICENSE file that
15+ * accompanied this code).
16+ *
17+ * You should have received a copy of the GNU General Public License version
18+ * 2 along with this work; if not, write to the Free Software Foundation,
19+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20+ *
21+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22+ * or visit www.oracle.com if you need additional information or have any
23+ * questions.
24+ */
25+
26+package sun.net;
27+
28+import java.util.ArrayList;
29+import java.util.Iterator;
30+import java.net.URL;
31+
32+/**
33+ * ProgressMonitor is a class for monitoring progress in network input stream.
34+ *
35+ * @author Stanley Man-Kit Ho
36+ */
37+public class ProgressMonitor
38+{
39+ /**
40+ * Return default ProgressMonitor.
41+ */
42+ public static synchronized ProgressMonitor getDefault() {
43+ return pm;
44+ }
45+
46+ /**
47+ * Change default ProgressMonitor implementation.
48+ */
49+ public static synchronized void setDefault(ProgressMonitor m) {
50+ if (m != null)
51+ pm = m;
52+ }
53+
54+ /**
55+ * Change progress metering policy.
56+ */
57+ public static synchronized void setMeteringPolicy(ProgressMeteringPolicy policy) {
58+ if (policy != null)
59+ meteringPolicy = policy;
60+ }
61+
62+
63+ /**
64+ * Return a snapshot of the ProgressSource list
65+ */
66+ public ArrayList<ProgressSource> getProgressSources() {
67+ ArrayList<ProgressSource> snapshot = new ArrayList<ProgressSource>();
68+
69+ try {
70+ synchronized(progressSourceList) {
71+ for (Iterator<ProgressSource> iter = progressSourceList.iterator(); iter.hasNext();) {
72+ ProgressSource pi = iter.next();
73+
74+ // Clone ProgressSource and add to snapshot
75+ snapshot.add((ProgressSource)pi.clone());
76+ }
77+ }
78+ }
79+ catch(CloneNotSupportedException e) {
80+ e.printStackTrace();
81+ }
82+
83+ return snapshot;
84+ }
85+
86+ /**
87+ * Return update notification threshold
88+ */
89+ public synchronized int getProgressUpdateThreshold() {
90+ return meteringPolicy.getProgressUpdateThreshold();
91+ }
92+
93+ /**
94+ * Return true if metering should be turned on
95+ * for a particular URL input stream.
96+ */
97+ public boolean shouldMeterInput(URL url, String method) {
98+ return meteringPolicy.shouldMeterInput(url, method);
99+ }
100+
101+ /**
102+ * Register progress source when progress is began.
103+ */
104+ public void registerSource(ProgressSource pi) {
105+
106+ synchronized(progressSourceList) {
107+ if (progressSourceList.contains(pi))
108+ return;
109+
110+ progressSourceList.add(pi);
111+ }
112+
113+ // Notify only if there is at least one listener
114+ if (progressListenerList.size() > 0)
115+ {
116+ // Notify progress listener if there is progress change
117+ ArrayList<ProgressListener> listeners = new ArrayList<ProgressListener>();
118+
119+ // Copy progress listeners to another list to avoid holding locks
120+ synchronized(progressListenerList) {
121+ for (Iterator<ProgressListener> iter = progressListenerList.iterator(); iter.hasNext();) {
122+ listeners.add(iter.next());
123+ }
124+ }
125+
126+ // Fire event on each progress listener
127+ for (Iterator<ProgressListener> iter = listeners.iterator(); iter.hasNext();) {
128+ ProgressListener pl = iter.next();
129+ ProgressEvent pe = new ProgressEvent(pi, pi.getURL(), pi.getMethod(), pi.getContentType(), pi.getState(), pi.getProgress(), pi.getExpected());
130+ pl.progressStart(pe);
131+ }
132+ }
133+ }
134+
135+ /**
136+ * Unregister progress source when progress is finished.
137+ */
138+ public void unregisterSource(ProgressSource pi) {
139+
140+ synchronized(progressSourceList) {
141+ // Return if ProgressEvent does not exist
142+ if (progressSourceList.contains(pi) == false)
143+ return;
144+
145+ // Close entry and remove from map
146+ pi.close();
147+ progressSourceList.remove(pi);
148+ }
149+
150+ // Notify only if there is at least one listener
151+ if (progressListenerList.size() > 0)
152+ {
153+ // Notify progress listener if there is progress change
154+ ArrayList<ProgressListener> listeners = new ArrayList<ProgressListener>();
155+
156+ // Copy progress listeners to another list to avoid holding locks
157+ synchronized(progressListenerList) {
158+ for (Iterator<ProgressListener> iter = progressListenerList.iterator(); iter.hasNext();) {
159+ listeners.add(iter.next());
160+ }
161+ }
162+
163+ // Fire event on each progress listener
164+ for (Iterator<ProgressListener> iter = listeners.iterator(); iter.hasNext();) {
165+ ProgressListener pl = iter.next();
166+ ProgressEvent pe = new ProgressEvent(pi, pi.getURL(), pi.getMethod(), pi.getContentType(), pi.getState(), pi.getProgress(), pi.getExpected());
167+ pl.progressFinish(pe);
168+ }
169+ }
170+ }
171+
172+ /**
173+ * Progress source is updated.
174+ */
175+ public void updateProgress(ProgressSource pi) {
176+
177+ synchronized (progressSourceList) {
178+ if (progressSourceList.contains(pi) == false)
179+ return;
180+ }
181+
182+ // Notify only if there is at least one listener
183+ if (progressListenerList.size() > 0)
184+ {
185+ // Notify progress listener if there is progress change
186+ ArrayList<ProgressListener> listeners = new ArrayList<ProgressListener>();
187+
188+ // Copy progress listeners to another list to avoid holding locks
189+ synchronized(progressListenerList) {
190+ for (Iterator<ProgressListener> iter = progressListenerList.iterator(); iter.hasNext();) {
191+ listeners.add(iter.next());
192+ }
193+ }
194+
195+ // Fire event on each progress listener
196+ for (Iterator<ProgressListener> iter = listeners.iterator(); iter.hasNext();) {
197+ ProgressListener pl = iter.next();
198+ ProgressEvent pe = new ProgressEvent(pi, pi.getURL(), pi.getMethod(), pi.getContentType(), pi.getState(), pi.getProgress(), pi.getExpected());
199+ pl.progressUpdate(pe);
200+ }
201+ }
202+ }
203+
204+ /**
205+ * Add progress listener in progress monitor.
206+ */
207+ public void addProgressListener(ProgressListener l) {
208+ synchronized(progressListenerList) {
209+ progressListenerList.add(l);
210+ }
211+ }
212+
213+ /**
214+ * Remove progress listener from progress monitor.
215+ */
216+ public void removeProgressListener(ProgressListener l) {
217+ synchronized(progressListenerList) {
218+ progressListenerList.remove(l);
219+ }
220+ }
221+
222+ // Metering policy
223+ private static ProgressMeteringPolicy meteringPolicy = new DefaultProgressMeteringPolicy();
224+
225+ // Default implementation
226+ private static ProgressMonitor pm = new ProgressMonitor();
227+
228+ // ArrayList for outstanding progress sources
229+ private ArrayList<ProgressSource> progressSourceList = new ArrayList<ProgressSource>();
230+
231+ // ArrayList for progress listeners
232+ private ArrayList<ProgressListener> progressListenerList = new ArrayList<ProgressListener>();
233+}
234+
235+
236+/**
237+ * Default progress metering policy.
238+ */
239+class DefaultProgressMeteringPolicy implements ProgressMeteringPolicy {
240+ /**
241+ * Return true if metering should be turned on for a particular network input stream.
242+ */
243+ public boolean shouldMeterInput(URL url, String method)
244+ {
245+ // By default, no URL input stream is metered for
246+ // performance reason.
247+ return false;
248+ }
249+
250+ /**
251+ * Return update notification threshold.
252+ */
253+ public int getProgressUpdateThreshold() {
254+ // 8K - same as default I/O buffer size
255+ return 8192;
256+ }
257+}