EV::Hiredis - Asynchronous redis client using hiredis and EV
use EV::Hiredis;
my $redis = EV::Hiredis->new;
$redis->connect('127.0.0.1');
# or
my $redis = EV::Hiredis->new( host => '127.0.0.1' );
# command
$redis->set('foo' => 'bar', sub {
my ($res, $err) = @_;
print $res; # OK
$redis->get('foo', sub {
my ($res, $err) = @_;
print $res; # bar
$redis->disconnect;
});
});
# start main loop
EV::run;
EV::Hiredis is a asynchronous client for Redis using hiredis and EV as backend.
This module connected to EV with C-Level interface so that it runs faster.
AnyEvent has a support for EV as its one of backends, so EV::Hiredis can be used in your AnyEvent applications seamlessly.
Unlike other redis modules, this module doesn't support utf-8 string.
This module handle all variables as bytes. You should encode your utf-8 string before passing commands like following:
use Encode;
# set $val
$redis->set(foo => encode_utf8 $val, sub { ... });
# get $val
$redis->get(foo, sub {
my $val = decode_utf8 $_[0];
});
Create new EV::Hiredis instance.
Available %options
are:
-
host => 'Str'
-
port => 'Int'
Hostname and port number of redis-server to connect.
-
path => 'Str'
UNIX socket path to connect.
-
on_error => $cb->($errstr)
Error callback will be called when a connection level error occurs.
This callback can be set by
$obj->on_error($cb)
method any time. -
on_connect => $cb->()
Connection callback will be called when connection successful and completed to redis server.
This callback can be set by
$obj->on_connect($cb)
method any time. -
connect_timeout => $num_of_milliseconds
Connection timeout.
-
command_timeout => $num_of_milliseconds
Command timeout.
-
loop => 'EV::loop',
EV loop for running this instance. Default is
EV::default_loop
.
All parameters are optional.
If parameters about connection (host&port or path) is not passed, you should call connect
or connect_unix
method by hand to connect to redis-server.
Connect to a redis-server for $hostname:$port
or $path
.
on_connect callback will be called if connection is successful, otherwise on_error callback is called.
Do a redis command and return its result by callback.
$redis->command('get', 'foo', sub {
my ($result, $error) = @_;
print $result; # value for key 'foo'
print $error; # redis error string, undef if no error
});
If any error is occurred, $error
presents the error message and $result
is undef.
If no error, $error
is undef and $result
presents response from redis.
NOTE: Alternatively all commands can be called via AUTOLOAD interface.
$redis->command('get', 'foo', sub { ... });
is equivalent to:
$redis->get('foo', sub { ... });
Disconnect from redis-server. This method is usable for exiting event loop.
Set new error callback to the instance.
Set new connect callback to the instance.
Daisuke Murase typester@cpan.org
Copyright (c) 2013 Daisuke Murase All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.