Check out Conway's
Perl Best Practices. From Chapter 13: Error Handling, Section Recoverable Failure, we find the following technique:
use Carp qw(croak);
use English qw(-no_match_vars);
use Net::FTP;
use Time::HiRes qw(sleep);
use strict;
my $MAX_TRIES = 15;
my $ftp;
TRY:
for my $try (1..$MAX_TRIES) {
# If successful, we're done.
eval {
$ftp = Net::FTP->new("some.host.name", Debug => 0)
or die "Cannot connect to some.host.name: $@";
last TRY;
};
# Report non-recoverable failure if no more tries
croak( $EVAL_ERROR ) if $try == $MAX_TRIES;
# Try again after a nap (approximate fibonacci)
sleep( rand (1.618 ** $try) );
}
- Miller
Update: Missing Semi-colon.
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: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.