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lib/Cache/Ref/LIFO.pm  view on Meta::CPAN

package Cache::Ref::LIFO;
BEGIN {
  $Cache::Ref::LIFO::AUTHORITY = 'cpan:NUFFIN';
}
BEGIN {
  $Cache::Ref::LIFO::VERSION = '0.04';
}
# ABSTRACT: Saves entries until full, discarding subsequent sets.

use Moose;

use namespace::autoclean;

extends qw(Cache::Ref);

with (
    'Cache::Ref::Role::API',
    'Cache::Ref::Role::Index' => {
        -alias => {
            _index_get => "get",
        },
    },
);

has size => (
    isa => "Int",
    is  => "ro",
    required => 1,
);

has _keys => (
    traits => [qw(Array)],
    isa => "ArrayRef",
    is  => "ro",
    default => sub { [] },
    handles => {
        _add_key => "push",
        #_splice_keys => "splice",
        _clear_keys => "clear",
    },
);

sub remove {
    my ( $self, @keys ) = @_;

    $self->_index_delete(@keys);

    my %keys;
    undef @keys{@keys};

    @{ $self->_keys } = grep { not exists $keys{$_} } @{ $self->_keys };

    return;
}

sub clear {
    my $self = shift;
    $self->_index_clear;
    $self->_clear_keys;

    return;
}

sub hit { }

sub set {
    my ( $self, $key, $value ) = @_;

    if ( defined $self->_index_get($key) ) {
        $self->_index_set($key, $value)
    } elsif ( $self->_index_size < $self->size ) {
        $self->_index_set($key, $value);