POE::Component::Client::MPD - full-blown poe-aware mpd client library
version 0.9.6
use POE qw{ Component::Client::MPD };
POE::Component::Client::MPD->spawn( {
host => 'localhost',
port => 6600,
password => 's3kr3t', # mpd password
alias => 'mpd', # poe alias
status_msgs_to => 'myapp', # session to send status info to
} );
# ... later on ...
$_[KERNEL]->post( 'mpd', 'next' );
POCOCM gives a clear message-passing interface (sitting on top of POE) for talking to and controlling MPD (Music Player Daemon) servers. A connection to the MPD server is established as soon as a new POCOCM object is created.
Commands are then sent to the server as messages are passed.
This method will create a POE session responsible for communicating with mpd. It will return the poe id of the session newly created.
You can tune the pococm by passing some arguments as a hash reference, where the hash keys are:
The hostname of the mpd server. If none given, defaults to MPD_HOST environment variable. If this var isn't set, defaults to localhost.
The port of the mpd server. If none given, defaults to MPD_PORT environment variable. If this var isn't set, defaults to 6600.
The password to sent to mpd to authenticate the client. If none given, defaults to MPD_PASSWORD environment variable. If this var isn't set, defaults to .
An optional string to alias the newly created POE session.
A session (name or id) to whom to send connection status to. Optional, although recommended. No default. When this is done, pococm will send *additional* events to the session, such as: mpd_connected when pococm is connected, mpd_disconnected when pococm is disconnected, etc. You thus need to register some handlers for those events.
POCOCM accepts two types of events: some are used to drive the mpd server, others will change the pococm status.
The goal of a POCOCM session is to drive a remote MPD server. This can be achieved by a lot of events. Due to their sheer number, they have been regrouped logically in modules.
However, note that to use those events, you need to send them to the POCOCM session that you created with spawn() (see above). Indeed, the logical split is only internal: you are to use the same peer.
For a list of public events that update and/or query MPD, see embedded pod in:
pl..coll..Those events allow to drive the POCOCM session.
Request the POCOCM to be shutdown. Leave mpd running. Generally sent when one wants to exit her program.
A POCOCM session will fire events, either to answer an incoming event, or to inform about some changes regarding the remote MPD server.
For each incoming event received by the POCOCM session, it will fire back one of the following answers:
Indicates a success. $msg is a POE::Component::Client::MPD::Message object with the original request, to identify the issued command (see POE::Component::Client::MPD::Message pod for more information). Its status() attribute is true, further confirming success.
$answer is what has been answered by the MPD server. Depending on the command, it can be either:
undef: commands play, etc.statsstatussong, etc.coll.files, etc.Refer to the documentation of each event to know what type of answer you can expect.
Indicates a failure. $msg is a POE::Component::Client::MPD::Message object with the original request, to identify the issued command (see POE::Component::Client::MPD::Message pod for more information). Its status() attribute is false, further confirming failure.
$errstr is what the error message as returned been answered by the MPD server.
The following events are fired by pococm:
Called when pococm-conn could not connect to a mpd server. It can be either retriable, or fatal. Check $reason for more information.
Called when pococm-conn made sure we're talking to a mpd server.
You can find more information on the mpd project on its homepage at http://www.musicpd.org, or its wiki http://mpd.wikia.com. You may want to have a look at Audio::MPD, a non-POE aware module to access MPD.
POE::Component::Client::MPD development takes place on <audio-mpd at googlegroups.com>: feel free to join us. (use http://groups.google.com/group/audio-mpd to sign in). Our git repository is located at http://github.com/jquelin/poe-component-client-mpd.git.
You can also look for information on this module at:
http://rt.cpan.org/NoAuth/Bugs.html?Dist=POE-Component-Client-MPD
Jerome Quelin
This software is copyright (c) 2007 by Jerome Quelin.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
