/**
* Unlock this file and abort this change.
*
* <p>The temporary file (if created) is deleted before returning.
*/
public void unlock() {
final LockFile tmp = myLock;
if (tmp != null) {
myLock = null;
tmp.unlock();
}
}
/**
* Save the configuration as a Git text style configuration file.
*
* <p><b>Warning:</b> Although this method uses the traditional Git file locking approach to
* protect against concurrent writes of the configuration file, it does not ensure that the file
* has not been modified since the last read, which means updates performed by other objects
* accessing the same backing file may be lost.
*
* @throws IOException the file could not be written.
*/
public void save() throws IOException {
final byte[] out;
final String text = toText();
if (utf8Bom) {
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
bos.write(0xEF);
bos.write(0xBB);
bos.write(0xBF);
bos.write(text.getBytes(RawParseUtils.UTF8_CHARSET.name()));
out = bos.toByteArray();
} else {
out = Constants.encode(text);
}
final LockFile lf = new LockFile(getFile(), fs);
if (!lf.lock()) throw new LockFailedException(getFile());
try {
lf.setNeedSnapshot(true);
lf.write(out);
if (!lf.commit())
throw new IOException(MessageFormat.format(JGitText.get().cannotCommitWriteTo, getFile()));
} finally {
lf.unlock();
}
snapshot = lf.getCommitSnapshot();
hash = hash(out);
// notify the listeners
fireConfigChangedEvent();
}
/**
* Write the entry records from memory to disk.
*
* <p>The cache must be locked first by calling {@link #lock()} and receiving true as the return
* value. Applications are encouraged to lock the index, then invoke {@link #read()} to ensure the
* in-memory data is current, prior to updating the in-memory entries.
*
* <p>Once written the lock is closed and must be either committed with {@link #commit()} or
* rolled back with {@link #unlock()}.
*
* @throws IOException the output file could not be created. The caller no longer holds the lock.
*/
public void write() throws IOException {
final LockFile tmp = myLock;
requireLocked(tmp);
try {
writeTo(new SafeBufferedOutputStream(tmp.getOutputStream()));
} catch (IOException err) {
tmp.unlock();
throw err;
} catch (RuntimeException err) {
tmp.unlock();
throw err;
} catch (Error err) {
tmp.unlock();
throw err;
}
}
