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package Nagios::Plugin::Range;
use 5.008004;
use strict;
use warnings;
use overload
'""' => sub { shift->stringify };
use Class::Struct;
struct "Nagios::Plugin::Range" => {
start => '$',
end => '$',
start_infinity => '$', # TRUE / FALSE
end_infinity => '$', # TRUE / FALSE
alert_on => '$', # OUTSIDE 0, INSIDE 1, not defined == range not set
};
my $outside = 0;
my $inside = 1;
sub stringify {
my $self = shift;
return "" unless $self->is_set;
return (($self->alert_on) ? "@" : "") .
(($self->start_infinity == 1) ? "~:" : (($self->start == 0)?"":$self->start.":")) .
(($self->end_infinity == 1) ? "" : $self->end);
}
sub is_set {
my $self = shift;
(! defined $self->alert_on) ? 0 : 1;
}
sub set_range_start {
my ($self, $value) = @_;
$self->start($value+0); # Force scalar into number
$self->start_infinity(0);
}
sub set_range_end {
my ($self, $value) = @_;
$self->end($value+0); # Force scalar into number
$self->end_infinity(0);
}
# Returns a N::P::Range object if the string is a conforms to a Nagios Plugin range string, otherwise null
sub parse_range_string {
my ($class, $string) = @_;
my $valid = 0;
my $range = $class->new( start => 0, start_infinity => 0, end => 0, end_infinity => 1, alert_on => $outside);
if ($string =~ s/^\@//) {
$range->alert_on($inside);
}
if ($string =~ s/^~//) {
$range->start_infinity(1);
}
if (($_) = $string =~ /^([-\d\.]+)?:/) {
$range->set_range_start($_) if defined $_;
$string =~ s/^([-\d\.]+)?://;
$valid++
}
if ($string =~ /^([-\d\.]+)$/) {
$range->set_range_end($string);
$valid++;
}
if ($valid && ($range->start_infinity == 1 || $range->end_infinity == 1 || $range->start <= $range->end)) {
return $range;
}
return undef;
}
# Returns 1 if an alert should be raised, otherwise 0
sub check_range {
my ($self, $value) = @_;
my $false = 0;
my $true = 1;
if ($self->alert_on == $inside) {
$false = 1;
$true = 0;
}
if ($self->end_infinity == 0 && $self->start_infinity == 0) {
if ($self->start <= $value && $value <= $self->end) {
return $false;
} else {
return $true;
}
} elsif ($self->start_infinity == 0 && $self->end_infinity == 1) {
if ($self->start <= $value) {
return $false;
} else {
return $true;
}
} elsif ($self->start_infinity == 1 && $self->end_infinity == 0) {
if ($value <= $self->end) {
return $false;
} else {
return $true;
}
} else {
return $false;
}
}
1;
__END__
=head1 NAME
Nagios::Plugin::Range - Common range functions for Nagios::Plugin
=head1 DESCRIPTION
Handles common Nagios Plugin range data. See Nagios::Plugin for creation interfaces.
=head1 AUTHOR
Ton Voon, E<lt>ton.voon@altinity.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2006 by Altinity Limited
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.8.4 or,
at your option, any later version of Perl 5 you may have available.
=cut
|
