/** * Rotate the head log file to a read-only log file, and open a new empty head log file to write * in. * * <p>All cursors opened on this log are temporarily disabled (closing underlying resources) and * then re-open with their previous state. */ private void rotateHeadLogFile() throws ChangelogException { // Temporarily disable cursors opened on head, saving their state final List<Pair<AbortableLogCursor<K, V>, CursorState<K, V>>> cursorsOnHead = disableOpenedCursorsOnHead(); final LogFile<K, V> headLogFile = getHeadLogFile(); final File readOnlyLogFile = new File(logPath, generateReadOnlyFileName(headLogFile)); headLogFile.close(); renameHeadLogFileTo(readOnlyLogFile); openHeadLogFile(); openReadOnlyLogFile(readOnlyLogFile); // Re-enable cursors previously opened on head, with the saved state updateOpenedCursorsOnHeadAfterRotation(cursorsOnHead); // Notify even if time-based rotation is not enabled, as it could be enabled at any time replicationEnv.notifyLogFileRotation(this); lastRotationTime = timeService.now(); }