How to determine the end of copying a file to the file system?

Question

Java

there is a function that copies a file from a temporary directory

try(OutputStream outputStream = new FileOutputStream(new File(fileFullPath));){
            int read = 0;
            byte[] bytes = new byte[1024];
            while ((read = is.read(bytes)) != -1) {
                outputStream.write(bytes, 0, read);
            }
            outputStream.flush();
        } catch (IOException e) {
            logger.error(e.getMessage(), e);
        }

the problem is that after copying the file needs to be transferred over the network. But the file is transferred correctly only when debugging is enabled, i.e. it is very likely that the transfer starts before the file is completely copied. Has anyone come across this problem and knows how to solve it?

Answer 1

well, after executing the while loop, when the file is read, call the function of copying it from the network, maybe I didn’t understand the question correctly ((((