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Handle data lock race condition

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This commit is contained in:
crschnick 2023-12-21 10:51:56 +00:00
parent 8e1665ba27
commit 7d03e22af3
1 changed files with 8 additions and 1 deletions
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9
app/src/main/java/io/xpipe/app/core/AppDataLock.java
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@ -5,6 +5,7 @@ import io.xpipe.app.issue.ErrorEvent;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.nio.file.FileAlreadyExistsException;
import java.nio.file.Files;
import java.nio.file.Path;
@ -22,7 +23,13 @@ public class AppDataLock {
var file = getLockFile().toFile();
Files.createDirectories(file.toPath().getParent());
if (!Files.exists(file.toPath())) {
Files.createFile(file.toPath());
try {
// It is possible that another instance creates the lock at almost the same time
// If it already exists, we lost the race
Files.createFile(file.toPath());
} catch (FileAlreadyExistsException f) {
return false;
}
}
channel = new RandomAccessFile(file, "rw").getChannel();
lock = channel.tryLock();