Hi,

I need a perl daemon to look into a MySQL table and grab all the jobs which need to be executed. New jobs can be added into this table at anytime, so i need the daemon to be constantly checking the table.

Once it has found the jobs, it needs to run another perl script to run with the $jobID found from the table. The child script has a sleep() function where the value comes from user input in the MySQL table.

This is what I got currently, but the problem is only one job can be executed at once and has to wait until the sleep() has finished, where then the next job can be executed.

Code Snippet 


# Enter loop to do work
for (;;) {
  my $sth = $sql_query{"sel_ext_master_jobs"}->execute() or die "can't
+ execute the query";
  my $results = $sql_query{"sel_ext_master_jobs"}->fetchall_hashref('j
+ob_id') or die $sth->err;

  foreach my $job_id (keys %$results) {
                  #print "JobID $job_id is available to be executed...
+\n";
                  system("perl -w script.pl $job_id");
  }

}

startDaemon();

sub startDaemon {
  # Daemonize
  eval { Proc::Daemon::Init(); };
  if ($@) {
          print "Unable to start daemon:  $@";
  }
  # If already running, then exit
  if (Proc::PID::File->running()) {
        dienice("Already running!");
        exit(0);
  }
}

[download]

Is there a way I can make this script run sub_scripts simultaneously, without having to wait for the sleep() to finish in the sub_scripts

I'm using Proc::Daemon

TIA

In reply to Perl Daemon by perlrush2011

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