Runtime Help

Question

Hi friends,
Am developing an application that users send an SMS text message to a number and
a Java program sequentially queris the phone for new messages ang processes them
, sending a reply to the requester.
Here is s snippet of the 'kernel' of the SMS detector
// ---snip
public void saveAllSMS()
        try
            // Get the SMS'es one by one (Nokia 3310)
        for (int i = 1; i < 21; i++)
             Runtime rt = Runtime.getRuntime();
          // Get the SMS through GAMMU
          Process proc = rt.exec("gammu --getsms SM " + String.valueOf(i));
          InputStream stdin = proc.getInputStream();
          InputStreamReader isr = new InputStreamReader(stdin);
          BufferedReader br = new BufferedReader(isr);
          while ((line = br.readLine()) != null)
                    content += line + "\n";
                // Parse the content of the SMS'es to the databases
                //String query = "INSERT INTO smsRequests VALUES... //--SNIP
        catch (Exception e)
            System.err.println(e);
            System.exit(0);
// ---snipNow, I would like to execute
Runtime.getRuntime().exec("gammu --getsms SM " + String.valueOf(i));right after the SMS has been sent into the database, but the process of deleting
fails coz the ports for connecting to the phone is still under lock from the
running process. If I try to delete all SMS'es at once it poses a risk as some
unprocessed SMS'es get deleted in the process. How can I run this deleting task
of that particular SMS just after sending its content to the database?

Answer 1

first off, your for loop is capped at 21 runs, why is
that?
secondly, why not just make all your database updates
(1 for each message) and then, at the end once all
values have been inserted, delete all the messages at
once.OK, that loop executes 20 times(basic loops in Java, remember?) Then this is why I dont delete all at once:
Suppose that there are three SMS'es in the phone.
rt.exec("gammu --getsms SM " + String.valueOf(i)); will get the SMS'es one by
one and into the database they go. Now suppose that GAMMU is reading the 16th
SMS and at that time a new text message arrives and it goes into position 4 of
the sim card. This SMS has not been sent into the database and at the end of the
cycle if I do "gammu --deleteallsms SM 1 20" all the SMS'es are deleted (including the new,
unprocessed one!) This is the bug am trying to work around