=pod

=head1 NAME

AnyEvent::Hiredis - AnyEvent hiredis API

=head1 SYNOPSIS

  use AnyEvent::Hiredis;

  my $redis = AnyEvent::Hiredis->new(
      host => '127.0.0.1',
      port => 6379,
  );

  $redis->command( [qw/SET foo bar/], sub { warn "SET!" } );
  $redis->command( [qw/GET foo/], sub { my $value = shift } );

  $redis->command( [qw/LPUSH listkey value/] );
  $redis->command( [qw/LPOP listkey/], sub { my $value = shift } );

  # errors
  $redis->command( [qw/SOMETHING WRONG/, sub { my $error = $_[1] } );

=head1 DESCRIPTION

C<AnyEvent::Hiredis> is an AnyEvent Redis API that uses the hiredis C client
library (L<https://github.com/antirez/hiredis>).

=head1 PERFORMANCE

One reason to consider C<AnyEvent::Hiredis> over its pure Perl counterpart
C<AnyEvent::Redis> is performance.  Here's a head to head comparison of the two
modules running on general purpose hardware:

                       Rate     ae_redis  ae_hiredis
    AnyEvent::Redis    7590/s   --        -89%
    AnyEvent::Hiredis 69400/s   814%      --

Rate here is the number of set operations per second achieved by each module.
See C<bin/compare.pl> for details.

=head1 METHODS

=head2 new

  my $redis = AnyEvent::Hiredis->new; # 127.0.0.1:6379

  my $redis = AnyEvent::Hiredis->new(server => '192.168.0.1', port => '6379');

=head2 command

C<command> takes an array ref representing a Redis command and a callback.
When the command has completed the callback is executed and passed the result
or error.

  $redis->command( ['SET', $key, 'foo'], sub {
      my ($result, $error) = @_;

      $result; # 'OK'
  });

  $redis->command( ['GET', $key], sub {
      my ($result, $error) = @_;

      $result; # 'foo'
  });

If the Redis server replies with an error then C<$result> will be C<undef> and
C<$error> will contain the Redis error string.  Otherwise C<$error> will be
C<undef>.

=head1 REPOSITORY

L<http://github.com/wjackson/anyevent-hiredis>

=head1 AUTHORS

Whitney Jackson

Jonathan Rockway

=head1 SEE ALSO

L<Redis>, L<Hiredis::Async>, L<AnyEvent::Redis>
