Java code for FTP upload doesn't work properly if launched as windows service

Question

I'm using java code for uploading some files using FTP. When I compile and run the code everything works perfectly, but if I launch it as a windows service using Java Service Launcher, it doesn't connect to the FTP server at all (it just does the rest of the job, that is moving files to archive folder).

Btw, is there any better way for testing child process's output, than writing it's output to a file, than parsing the file content? Here's the code:

Runtime runtime = Runtime.getRuntime();
String[] cmd = {"c:\\ftp\\putskripta.bat"};
Process p1 = runtime.exec(cmd);
p1.waitFor();


File izlaz = new File("C:\\ftp\\izlaz.txt");

int arrlen = 10000;
byte[] infile = new byte[arrlen];

FileInputStream fis = new FileInputStream(izlaz); 
BufferedInputStream bis = new BufferedInputStream(fis);
DataInputStream dis = new DataInputStream(bis);

int filelength = dis.read(infile);
String filestring = new String(infile, 0, 10000);
CharSequence[] sekvenca = {"Invalid command", "Not connected"};

if (!filestring.contains(sekvenca[0]) && !filestring.contains(sekvenca[1]))
{
            File uploads = new File("C:\\ftp\\Uploads");
            File[] uploadfiles = uploads.listFiles();
            int godina = java.util.Calendar.getInstance().get(java.util.Calendar.YEAR);
            int mjesec = Calendar.getInstance().get(Calendar.MONTH)+1;
            int dan = Calendar.getInstance().get(Calendar.DAY_OF_MONTH);


            for (int i = 0; i < uploadfiles.length; i++) {
                if (uploadfiles[i].getName().startsWith("ARTST") || uploadfiles[i].getName().startsWith("BESTE") || uploadfiles[i].getName().startsWith("LAGER") || uploadfiles[i].getName().startsWith("AVISE") || uploadfiles[i].getName().startsWith("KUNDE") || uploadfiles[i].getName().startsWith("BORDE") || uploadfiles[i].getName().startsWith("ENTLA")) {
                    File destinacijaFoldera = new File("C:\\ftp\\MovedUploads\\" + godina + "\\" + mjesec + "\\" + dan);

                    File destinacijaFajla = new File("C:\\ftp\\MovedUploads\\" + godina + "\\" + mjesec + "\\" + dan + "\\" + uploadfiles[i].getName());
                    if (!destinacijaFoldera.isDirectory()) {
                        destinacijaFoldera.mkdirs();
                    }

                File temp = new File(destinacijaFoldera, uploadfiles[i].getName() + "_" + String.valueOf(Calendar.getInstance().get(Calendar.HOUR_OF_DAY)) + String.valueOf(Calendar.getInstance().get(Calendar.MINUTE)) + String.valueOf(Calendar.getInstance().get(Calendar.SECOND)));    
                if (!destinacijaFajla.exists()) {
                 uploadfiles[i].renameTo(destinacijaFajla);
                }
                else{
                    uploadfiles[i].renameTo(temp);
                }

                    uploadfiles[i].renameTo(new File(destinacijaFoldera, uploadfiles[i].getName()));
                }
            }
        }
else {izlaz.delete(); throw new Exception("Neuspio pokusaj uploada");}
        izlaz.delete();

Just in case, here is the code for "putskripta.bat"

@echo off
cd c:\ftp\Uploads
ftp -s:c:\ftp\putkomande.txt -i localhost > c:\ftp\izlaz.txt

Answer 1

By default, Windows Services run under the LocalSystem account, which does not have network access. Reconfigure your service to use an account that has access to your FTP site, such as NetworkService, or an account you create.

Answer 2

I don't have a better way of getting the results back from the child process, but I have had success using ftp without creating a child process. The Apache Commons Net package has methods to do the FTP from within the java program.