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# You may distribute under the terms of either the GNU General Public License
# or the Artistic License (the same terms as Perl itself)
#
# (C) Paul Evans, 2020 -- leonerd@leonerd.org.uk
package Metrics::Any::Adapter::Null 0.10;
use v5.14;
use warnings;
=head1 NAME
C<Metrics::Any::Adapter::Null> - a metrics reporting adapter which does nothing
=head1 DESCRIPTION
This L<Metrics::Any> adapter type contains an empty stub implementation of the
adapter API, allowing a module to invoke methods on its metrics collector that
do not do anything.
A program would run with this adapter by default unless it has requested a
different one, via the C<use Metrics::Any::Adapter> statement.
This adapter type claims to support batch mode, though the reporting callback
will never be invoked.
=cut
sub new
{
my $class = shift;
return bless {}, $class;
}
# All of these are empty methods
foreach my $method (qw(
make_counter inc_counter_by
make_distribution report_distribution
make_gauge inc_gauge_by set_gauge_to
make_timer report_timer
)) {
no strict 'refs';
*$method = sub {};
}
# Batch mode is supported but does nothing
use constant HAVE_BATCH_MODE => 1;
sub add_batch_mode_callback {}
=head1 AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
=cut
0x55AA;
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