Two rather different approaches spring to mind:
  1. Save the output from the long-running job to a temporary file, and read from that when you need the results
  2. Launch the long-running job as a sub-process of your Perl program, and use one of the many IPC (inter-process-communication) methods
Alternative (a) is a lot easier to implement provided that you can run the 1hr+ job before the rest of the code. Data::Dumper or Storable are two useful modules if you want a "perlish" format to the results data. Alternative (b) may allow you to interact with the long-running job, but it is non-trivial to avoid all of the potential pit-falls of concurrent programming. You may want to investigate the IPC::Open2 module for this alternative.

In reply to Re: executing external program question by odrm
in thread executing external program question by echoangel911

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.