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feat: add config option for if the DOC should lock the file channel (#2526)

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- related to #2222
- effectively just a workaround as most people would not need to worry about locking the clipboard file
This commit is contained in:
Jordan 2023-12-18 15:04:34 +00:00 committed by GitHub
parent f44b1b48c7
commit 6caf4640ea
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 24 additions and 15 deletions
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7
worldedit-core/src/main/java/com/fastasyncworldedit/core/configuration/Settings.java
View File

@ -721,6 +721,13 @@ public class Settings extends Config {
" - Requires clipboard.use-disk to be enabled"
})
public boolean SAVE_CLIPBOARD_NBT_TO_DISK = true;
@Comment({
"Apply a file lock on the clipboard file (only relevant if clipboad.on-disk is enabled)",
" - Prevents other processes using the file whilst in use by FAWE",
" - This extends to other servers, useful if you have multiple servers using a unified clipboard folder",
" - May run into issues where a file lock is not correctly lifted"
})
public boolean LOCK_CLIPBOARD_FILE = false;
}

32
worldedit-core/src/main/java/com/fastasyncworldedit/core/extent/clipboard/DiskOptimizedClipboard.java
View File

@ -305,22 +305,24 @@ public class DiskOptimizedClipboard extends LinearClipboard {
private void init() throws IOException {
if (this.fileChannel == null) {
this.fileChannel = braf.getChannel();
try {
FileLock lock = this.fileChannel.lock();
LOCK_HOLDER_CACHE.put(file.getName(), new LockHolder(lock));
} catch (OverlappingFileLockException e) {
LockHolder existing = LOCK_HOLDER_CACHE.get(file.getName());
if (existing != null) {
long ms = System.currentTimeMillis() - existing.lockHeldSince;
LOGGER.error(
"Cannot lock clipboard file {} acquired by thread {}, {}ms ago",
file.getName(),
existing.thread,
ms
);
if (Settings.settings().CLIPBOARD.LOCK_CLIPBOARD_FILE) {
try {
FileLock lock = this.fileChannel.lock();
LOCK_HOLDER_CACHE.put(file.getName(), new LockHolder(lock));
} catch (OverlappingFileLockException e) {
LockHolder existing = LOCK_HOLDER_CACHE.get(file.getName());
if (existing != null) {
long ms = System.currentTimeMillis() - existing.lockHeldSince;
LOGGER.error(
"Cannot lock clipboard file {} acquired by thread {}, {}ms ago",
file.getName(),
existing.thread,
ms
);
}
// Rethrow to prevent clipboard access
throw e;
}
// Rethrow to prevent clipboard access
throw e;
}
this.byteBuffer = fileChannel.map(FileChannel.MapMode.READ_WRITE, 0, braf.length());
}