Recovering efficiently from an IOException.

Question

Hi All,
I have a program that continuously "poles" various URLs and then establishes stream connections with those URLs. During the course of a program run any number of streams may be established. To date during program testing the program has successfully established approximately five hundred connections.
However inevitably this program comes to a "crashing" holt as a result of IOExceptions. Admittedly this program does not holt on the first occurence of an IOException. None the less IOExceptions causes this program to halt sooner or later.
I have come to the conclusion that IOExceptions occuring in my program are not always occuring when the stream connection is established. I am convinced that IOExceptions are sometimes occuring during stream communications. To this end I have tried to include a break statement in my streams code, however including the break statement has not helped. My code looks like this:
      inStream = xURL.openStream();
      outStream = new FileOutputStream(resourceFile);
      int in;
      byte[] buffer = new byte[1024];
      while((in = inStream.read(buffer)) != -1)
        outStream.write(buffer, 0, in);
          if(success_flag == false)
            break;
    }catch(MalformedURLException e){
      success_flag = false;
    }catch(FileNotFoundException e){
      success_flag = false;
    }catch(IOException e){
      success_flag = false;
  }The break statement included above is intended to break the code out of the while loop. Does the code work as I intend or is this simply causing the if statement to be exited rather than the while loop? Also
can somebody please suggest how to improve this code so that IOExceptions are not as big a problem as they are now. I cannot foresee a way to stop the exceptions from occuring however I need a very good way of recovering from them and continuing on with program operation.
Thanks for your assistance.
Regards
Davo

Answer 1

The break statement included above is intended to
break the code out of the while loop. Does the code
work as I intend or is this simply causing the if
statement to be exited rather than the while loop?A break statement exits the closest while, do, for and switch. So your if statement is fine.