I have much the same situation with an app that I wrote. The driver script needs to load a series of modules that I specify in a hash... the keys are class names, and the values are array refs with the instantiation parms.

Anyway, I just look for errors from the eval, which you can parse for keywords if you need. Then I write to a logging class, and move to the next classname.

The relevant code extract:

for my $sysName ( keys %systemList ) {  ## Loop through system types
  $logger->msg("loading class $sysName",0);
  eval "require $sysName";     ## include the proper module file
  if ($@) { $logger->msg("Package $sysName not found.",3); next; }

  ## instantiate the new object
  my $obj = new ${sysName}( @{$systemList{$sysName}} );    

  ### etc...
}

[download]

It may not be the "right" way, but it is working for my purposes. Good luck!



PCS

In reply to Re: How best to require subclasses at runtime by webengr
in thread How best to require subclasses at runtime by FamousLongAgo

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