question: @ Override public boolean lock ( ) { try { if ( ! FileFactory . isFileExist ( location , FileFactory . getFileType ( tmpPath ) ) ) { FileFactory . mkdirs ( location , FileFactory . getFileType ( tmpPath ) ) ; } String lockFilePath = location + CarbonCommonConstants . FILE_SEPARATOR + lockFile ; if ( ! FileFactory . isFileExist ( lockFilePath , FileFactory . getFileType ( location ) ) ) { FileFactory . createNewLockFile ( lockFilePath , FileFactory . getFileType ( location ) ) ; } fileOutputStream = new FileOutputStream ( lockFilePath ) ; channel = fileOutputStream . getChannel ( ) ; try { fileLock = channel . tryLock ( ) ; } catch ( OverlappingFileLockException e ) { return false ; } if ( null != fileLock ) { return true ; } else { return false ; } } catch ( IOException e ) { return false ; } }
target:  Lock API for locking of the file channel of the lock file.