-package App::MPD::Feeder;
-
-use strict;
-use warnings;
+use v5.28;
use utf8;
-use feature 'state';
+use Object::Pad;
+class App::MPD::Feeder;
-use App::MPD::Feeder::Options;
use App::MPD::Feeder::DB;
+use App::MPD::Feeder::Options;
+use App::MPD::Feeder::WorkQueue;
use DBD::Pg;
use DBI;
use Getopt::Long;
use IO::Async::Signal;
+use IO::Async::Timer::Countdown;
+use IO::Async::Timer::Periodic;
use Log::Any qw($log);
use Net::Async::MPD;
use Object::Pad;
use Syntax::Keyword::Try;
+use Time::Duration qw(duration_exact);
+
+has $cfg_file :reader;
+has $opt :reader;
+has $db :reader;
+has $db_needs_update :writer = 1;
+has $mpd :reader;
+has $mpd_connected = 0;
+has $playlist_needs_filling = 1;
+has $quit_requested = 0;
+has $reload_requested = 0;
+has $idler;
+has $last_mpd_comm;
+has $reconnect_delay = 5;
+use constant DEFAULT_CONFIG_FILE => '/etc/mpd-feeder/mpd-feeder.conf';
-class App::MPD::Feeder {
- has $cfg_file :reader;
- has $opt :reader;
- has $db :reader;
- has $db_needs_update :writer = 1;
- has $mpd :reader;
+ADJUST {
+ Getopt::Long::Configure('pass_through');
+ Getopt::Long::GetOptions( 'cfg|config=s' => \$cfg_file );
+ Getopt::Long::Configure('no_pass_through');
-use constant DEFAULT_CONFIG_FILE => '/etc/mpd-feeder/mpd-feeder.conf';
+ $cfg_file //= DEFAULT_CONFIG_FILE if -e DEFAULT_CONFIG_FILE;
- ADJUST {
- Getopt::Long::Configure('pass_through');
- Getopt::Long::GetOptions('cfg|config=s' => \$cfg_file);
- Getopt::Long::Configure('no_pass_through');
+ $self->configure;
- $cfg_file //= DEFAULT_CONFIG_FILE if -e DEFAULT_CONFIG_FILE;
+ $db_needs_update = 0 if $opt->skip_db_update;
+}
- $self->configure;
+method configure {
+ my $new_opt = App::MPD::Feeder::Options->new;
- $db_needs_update = 0 if $opt->skip_db_update;
- }
+ $new_opt->parse_config_file($cfg_file) if $cfg_file;
- method configure {
- my $new_opt = App::MPD::Feeder::Options->new;
+ $new_opt->parse_command_line;
- $new_opt->parse_config_file($cfg_file) if $cfg_file;
+ Log::Any::Adapter->set( Stderr => log_level => $new_opt->log_level );
- $new_opt->parse_command_line;
+ $opt = $new_opt;
- Log::Any::Adapter->set( Stderr => log_level => $new_opt->log_level );
+ $reconnect_delay = $opt->initial_reconnect_delay;
- $opt = $new_opt;
+ $db = App::MPD::Feeder::DB->new( opt => $opt );
+}
- $db = App::MPD::Feeder::DB->new( opt => $opt );
- }
+method init_mpd {
+ return if $mpd;
- method connect_mpd {
- return if $mpd;
+ my %conn = ( auto_connect => 0 );
+ $conn{host} = $opt->mpd_host if $opt->mpd_host;
+ $conn{port} = $opt->mpd_port if $opt->mpd_port;
- my %conn = ( auto_connect => 1 );
- $conn{host} = $opt->mpd_host if $opt->mpd_host;
- $conn{port} = $opt->mpd_port if $opt->mpd_port;
+ $mpd = Net::Async::MPD->new(%conn);
- $mpd = Net::Async::MPD->new(%conn);
+ $mpd->on(
+ close => sub {
+ $log->warn("Connection to MPD lost");
+ $mpd->loop->stop('disconnected');
+ $mpd_connected = 0;
+ $idler->cancel if $idler;
+ undef $mpd;
+ $self->init_mpd;
+ }
+ );
+ $mpd->on(
+ playlist => sub {
+ $playlist_needs_filling = 1;
+ }
+ );
+ $mpd->on(
+ database => sub {
+ $db_needs_update = 1;
+ }
+ );
- $mpd->on(
- close => sub {
- die "Connection to MPD lost";
- }
- );
+ my $int_signal_handler = sub {
+ state $signal_count = 0;
+ $signal_count++;
- my $int_signal_handler = sub {
- state $signal_count = 0;
- $signal_count++;
- $log->debug("Signal received. Stopping loop");
- $mpd->loop->stop('quit');
-
- if ( $signal_count > 1 ) {
- $log->warn("Another signal received (#$signal_count)");
- $log->warn("Exiting abruptly");
- exit 2;
- }
- };
-
- for (qw(TERM INT)) {
- $mpd->loop->add(
- IO::Async::Signal->new(
- name => $_,
- on_receipt => $int_signal_handler,
- )
- );
+ if ( $signal_count > 1 ) {
+ $log->warn("Another signal received (#$signal_count)");
+ $log->warn("Exiting abruptly");
+ exit 2;
}
- $mpd->loop->add(
- IO::Async::Signal->new(
- name => 'HUP',
- on_receipt => sub {
- $log->debug("SIGHUP received. Scheduling reload");
- $mpd->loop->stop('reload');
- },
- )
- );
+ $log->debug("Signal received. Stopping loop");
+ $quit_requested = 1;
+ $mpd->loop->stop('quit');
+ $self->break_idle;
+ };
+ for (qw(TERM INT)) {
$mpd->loop->add(
IO::Async::Signal->new(
- name => 'USR1',
- on_receipt => sub {
- $log->debug("SIGUSR1 received. Dumping configuration to STDERR");
- my $old = select \*STDERR;
- try {
- $opt->dump;
- }
- finally {
- select $old;
- }
- },
+ name => $_,
+ on_receipt => $int_signal_handler,
)
);
}
- method connect_db {
- $db->connect($opt);
- $self->update_db;
+ $mpd->loop->add(
+ IO::Async::Signal->new(
+ name => 'HUP',
+ on_receipt => sub {
+ $log->debug("SIGHUP received. Scheduling reload");
+ $reload_requested = 1;
+ $mpd->loop->stop('reload');
+ $self->break_idle;
+ },
+ )
+ );
+
+ $mpd->loop->add(
+ IO::Async::Signal->new(
+ name => 'USR1',
+ on_receipt => sub {
+ $log->debug(
+ "SIGUSR1 received. Dumping configuration to STDERR");
+ my $old = select \*STDERR;
+ try {
+ $opt->dump;
+ }
+ finally {
+ select $old;
+ }
+ },
+ )
+ );
+}
+
+method connect_db {
+ $db->connect($opt);
+}
+
+method update_db( $force = undef ) {
+ if ( !$db_needs_update and !$force ) {
+ $log->debug("Skipping DB update");
+ return;
}
- method update_db($force = undef) {
- if (!$db_needs_update and !$force) {
- $log->debug("Skipping DB update");
- return;
- }
+ $log->info('Updating song database');
+
+ my $rows = $mpd->send('listallinfo')->get;
+
+ $log->trace('got all songs from MPD');
+
+ $db->start_update;
+ try {
+ my $song_count;
+
+ foreach my $entry (@$rows) {
+ next unless exists $entry->{file};
- $log->info('Updating song database');
- $self->connect_mpd;
+ $self->db->store_song( $entry->{file},
+ $entry->{AlbumArtist} // $entry->{Artist},
+ $entry->{Album} );
- my $rows = $mpd->send('listallinfo')->get;
+ $song_count++;
+ }
- $db->start_update;
- try {
- my $song_count;
+ my ($total_songs, $total_artists, $total_albums,
+ $new_songs, $new_artists, $new_albums
+ ) = $self->db->finish_update;
- foreach my $entry (@$rows) {
- next unless exists $entry->{file};
+ $log->info(
+ "Updated data about $song_count songs (including $new_songs new), "
+ . "$total_artists artists (including $new_artists new) "
- $self->db->store_song( $entry->{file},
- $entry->{AlbumArtist} // $entry->{Artist},
- $entry->{Album} );
- $song_count++;
- }
+ . "and $total_albums albums (including $new_albums new)"
+ );
- $log->info("Updated data about $song_count songs");
+ $db_needs_update = 0;
+ }
+ catch {
+ my $err = $@;
+ $self->db->cancel_update;
+ die $err;
+ }
+}
- $self->db->remove_stale_entries;
+method queue_songs( $num = undef ) {
+ if ( !defined $num ) {
+ return unless $playlist_needs_filling;
- $self->db->finish_update;
+ $log->trace("Requesting playlist");
+ my $present = $mpd->send('playlist')->get // [];
+ $present = scalar(@$present);
- $db_needs_update = 0;
+ $log->notice( "Playlist contains $present songs. Wanted: "
+ . $opt->target_queue_length );
+ if ( $present < $opt->target_queue_length ) {
+ $self->queue_songs( $opt->target_queue_length - $present );
}
- catch {
- my $err = $@;
- $self->db->cancel_update;
- die $err;
+ else {
+ $playlist_needs_filling = 0;
}
+
+ return;
}
- method queue_songs($num = undef, $callback = undef) {
- $self->connect_db;
- if (!defined $num) {
- $self->connect_mpd;
- $mpd->send('playlist')->on_done(
- sub {
- my $present = scalar @{ $_[0] };
-
- $log->notice( "Playlist contains $present songs. Wanted: "
- . $opt->target_queue_length );
- if ( $present < $opt->target_queue_length ) {
- $self->queue_songs(
- $opt->target_queue_length - $present, $callback );
- }
- else {
- $callback->() if $callback;
- }
- }
- );
+ my @list = $self->db->find_suitable_songs($num);
- return;
- }
+ die "Found no suitable songs" unless @list;
+
+ if ( @list < $num ) {
+ $log->warn(
+ sprintf(
+ 'Found only %d suitable songs instead of %d',
+ scalar(@list), $num
+ )
+ );
+ }
- my @list = $self->db->find_suitable_songs($num);
+ $log->info("About to add $num songs to the playlist");
- die "Found no suitable songs" unless @list;
+ my @paths;
+ for my $song (@list) {
+ my $path = $song->{song};
+ $path =~ s/"/\\"/g;
+ push @paths, $path;
+ }
- if ( @list < $num ) {
- $log->warn(
- sprintf(
- 'Found only %d suitable songs instead of %d',
- scalar(@list), $num
- )
- );
+ $log->debug( "Adding " . join( ', ', map {"«$_»"} @paths ) );
+
+ # MPD needs raw bytes
+ utf8::encode($_) for @paths;
+ my @commands;
+ for (@paths) {
+ push @commands, [ add => "\"$_\"" ];
+ }
+ my $f = $mpd->send( \@commands );
+ $f->on_fail( sub { die @_ } );
+ $f->on_done(
+ sub {
+ $self->db->note_song_qeued($_) for @list;
+ $playlist_needs_filling = 0;
}
+ );
+ $f->get;
+}
- $log->info("About to add $num songs to the playlist");
+method reexec {
+ $log->notice("disconnecting and re-starting");
+ $db->disconnect;
+ undef $mpd;
- my @paths;
- for my $song (@list) {
- my $path = $song->{song};
- $path =~ s/"/\\"/g;
- push @paths, $path;
+ my @exec = ( $0, '--config', $self->cfg_file, '--skip-db-update' );
+ if ( $log->is_trace ) {
+ $log->trace( 'exec ' . join( ' ', map { /\s/ ? "'$_'" : $_ } @exec ) );
+ }
+ exec(@exec);
+}
+
+method break_idle {
+ if ( $idler && !$idler->is_ready ) {
+ if ($mpd_connected) {
+ $log->trace("hand-sending 'noidle'");
+ undef $idler;
+ $mpd->{mpd_handle}->write("noidle\n");
+ }
+ else {
+ $log->trace("not connected to MPD: skipping 'noidle'");
}
+ }
+ else {
+ $log->trace("no idler found");
+ }
+}
+
+method sleep_before_reconnection {
+ $log->debug( "Waiting for "
+ . duration_exact($reconnect_delay)
+ . " before re-connecting" );
+
+ $mpd->loop->add(
+ IO::Async::Timer::Countdown->new(
+ delay => $reconnect_delay,
+ on_expire => sub { $mpd->loop->stop },
+ )->start
+ );
+
+ $reconnect_delay = $reconnect_delay * 1.5;
+ $reconnect_delay = 120 if $reconnect_delay > 120;
+ $mpd->loop->run;
+}
- $log->debug( "Adding " . join( ', ', map {"«$_»"} @paths ) );
- # MPD needs raw bytes
- utf8::encode($_) for @paths;
- my @commands;
- for (@paths) {
- push @commands, [ add => "\"$_\"" ];
+method pulse {
+ unless ($mpd_connected) {
+ $log->trace("Connecting to MPD...");
+ my $f = $mpd->connect->await;
+
+ if ( $f->is_done ) {
+ $mpd_connected = 1;
+ $playlist_needs_filling = 1;
+ $reconnect_delay = $opt->initial_reconnect_delay;
+ $mpd->loop->later( sub { $self->pulse } );
}
- $self->connect_mpd;
- my $f = $mpd->send( \@commands );
- $f->on_fail( sub { die @_ } );
- $f->on_done(
- sub {
- $self->db->note_song_qeued($_) for @list;
- $callback->(@_) if $callback;
- }
- );
+ elsif ( $f->is_failed ) {
+ $mpd->loop->stop('disconnected');
+ $log->warn($f->failure);
+ $self->sleep_before_reconnection;
+ }
+ else {
+ die "connect Future neither done nor failed!?";
+ }
+
+ return;
}
- method prepare_to_wait_idle {
- $log->trace('declaring idle mode');
- $mpd->send('idle database playlist')->on_done(
- sub {
- my $result = shift;
+ if ($db_needs_update) {
+ $self->update_db;
+ $mpd->loop->later( sub { $self->pulse } );
+ return;
+ }
- if ( $result->{changed} eq 'database' ) {
- $db_needs_update = 1;
- $self->prepare_to_wait_idle;
- }
- elsif ( $result->{changed} eq 'playlist' ) {
- $self->queue_songs( undef,
- sub { $self->prepare_to_wait_idle } );
- }
- else {
- use JSON;
- $log->warn(
- "Unknown result from idle: " . to_json($result) );
- $self->prepare_to_wait_idle;
- }
- }
- );
+ if ($playlist_needs_filling) {
+ $self->queue_songs;
+ $mpd->loop->later( sub { $self->pulse } );
+ return;
}
- method stop {
- undef $mpd;
+ $log->debug("Waiting idle. PID=$$");
+ $last_mpd_comm = time;
+ $idler = $mpd->send("idle database playlist");
+ $idler->await;
+
+ $log->trace('got out of idle');
- $db->disconnect;
+ if ( $idler->is_done ) {
+ my $result = $idler->get;
+ undef $idler;
+ if ( ref $result and $result->{changed} ) {
+ my $changed = $result->{changed};
+ $changed = [$changed] unless ref $changed;
+
+ $mpd->emit($_) for @$changed;
+ }
+ }
+ elsif ( $idler->is_cancelled ) {
+ $log->trace("idle was cancelled");
+ undef $idler;
+ }
+ elsif ( $idler->is_failed ) {
+ $log->warn("idle failed: ".$idler->failure);
+ undef $idler;
}
- method run_loop {
- $self->connect_mpd;
- $self->connect_db;
+ $mpd->loop->stop;
+}
- for ( ;; ) {
- $self->queue_songs( undef, sub { $self->prepare_to_wait_idle } );
+method run_loop {
+ $self->connect_db;
- $log->debug("Entering event loop. PID=$$");
+ $self->init_mpd;
- my $result = $mpd->loop->run;
- $log->trace( "Got loop result of " . ( $result // 'undef' ) );
+ $mpd->loop->add(
+ IO::Async::Timer::Periodic->new(
+ interval => 60,
+ on_tick => sub {
+ if (!$mpd_connected) {
+ $log->trace("Not connected to MPD. Skipping alive check.");
+ return;
+ }
- if ( 'reload' eq $result ) {
- $log->notice("disconnecting");
- $self->stop;
+ if ( time - $last_mpd_comm > 300 ) {
- my @exec = ( $0, '--config', $self->cfg_file, '--skip-db-update' );
- if ( $log->is_trace ) {
- $log->trace( 'exec '
- . join( ' ', map { /\s/ ? "'$_'" : $_ } @exec ) );
+ $log->trace(
+ "no active MPD communication for more that 5 minutes");
+ $log->debug("forcing alive check");
+ $self->break_idle;
+ }
+ else {
+ $log->trace(
+ "contacted MPD less than 5 minutes ago. skipping alive check"
+ );
}
- exec(@exec);
- }
-
- if ( 'quit' eq $result ) {
- $log->trace("quitting because of 'quit' loop result");
- $self->stop;
- exit 0;
- }
+ },
+ )->start
+ );
+
+ for ( ;; ) {
+ if ( $quit_requested ) {
+ $log->trace("about to quit");
+ undef $mpd;
+ $db->disconnect;
+ last;
+ }
+ elsif ( $reload_requested ) {
+ $self->reexec;
+ die "Not reached";
}
+
+ $log->trace('About to run the loop');
+
+ $mpd->loop->later( sub { $self->pulse } );
+
+ $mpd->loop->run;
}
}
+1;
projects / mpd-feeder.git / blobdiff