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8372048: Performance improvement on Linux remote desktop

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Reviewed-by: azvegint, serb
This commit is contained in:
Renjith Kannath Pariyangad 2025-11-19 12:13:37 +00:00 committed by Alexander Zvegintsev
parent d2926dfd9a
commit 0b3df489e9
2 changed files with 26 additions and 7 deletions
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8
src/java.desktop/unix/classes/sun/awt/screencast/ScreencastHelper.java
View File

@ -63,9 +63,11 @@ public final class ScreencastHelper {
private static final int DELAY_BEFORE_SESSION_CLOSE = 2000;
private static volatile TimerTask timerTask = null;
private static final Timer timerCloseSession
= new Timer("auto-close screencast session", true);
private static class TimerHolder {
private static final Timer timerCloseSession =
new Timer("auto-close screencast session", true);
}
private ScreencastHelper() {}
@ -143,7 +145,7 @@ public final class ScreencastHelper {
}
};
timerCloseSession.schedule(timerTask, DELAY_BEFORE_SESSION_CLOSE);
TimerHolder.timerCloseSession.schedule(timerTask, DELAY_BEFORE_SESSION_CLOSE);
}
public static synchronized void getRGBPixels(

25
src/java.desktop/unix/classes/sun/awt/screencast/TokenStorage.java
View File

@ -238,6 +238,7 @@ final class TokenStorage {
}
private static WatchService watchService;
private static volatile boolean isWatcherThreadStarted = false;
private static void setupWatch() {
try {
@ -257,10 +258,6 @@ final class TokenStorage {
"file watch %s\n", e);
}
}
if (watchService != null) {
new WatcherThread(watchService).start();
}
}
// called from native
@ -337,7 +334,27 @@ final class TokenStorage {
return true;
}
private static void startWatcherThreadIfNeeded() {
if (!isWatcherThreadStarted) {
// not sure if the double-checked locking is actually needed here
// the getTokens is only called from ScreencastHelper#getRGBPixels
// and ScreencastHelper#remoteDesktop* methods (which are synchronized),
// but it may change later.
synchronized (TokenStorage.class) {
if (!isWatcherThreadStarted) {
readTokens(PROPS_PATH);
if (watchService != null) {
new WatcherThread(watchService).start();
}
isWatcherThreadStarted = true;
}
}
}
}
static Set<TokenItem> getTokens(List<Rectangle> affectedScreenBounds) {
startWatcherThreadIfNeeded();
// We need an ordered set to store tokens
// with exact matches at the beginning.
LinkedHashSet<TokenItem> result = new LinkedHashSet<>();