use Storable qw/lock_store lock_retrieve/;
use YAML;
-our $VERSION = '0.03';
+our $VERSION = '0.06';
__PACKAGE__->mk_classdata( '_events' => [] );
__PACKAGE__->mk_accessors('_event_state');
}
my $conf = $class->config->{scheduler};
-
+
my $event = {
trigger => $args{trigger},
event => $args{event},
# replace keywords that Set::Crontab doesn't support
$args{at} = _prepare_cron( $args{at} );
-
+
# parse the cron entry into a DateTime::Set
my $set;
eval { $set = DateTime::Event::Cron->from_cron( $args{at} ) };
. $@ );
}
else {
+ $event->{at} = $args{at};
$event->{set} = $set;
}
}
# trap errors
local $c->{error} = [];
+
+ # return value/output from the event, if any
+ my $output;
# run event
eval {
local $c->res->{status};
if ( ref $event->{event} eq 'CODE' ) {
- $event->{event}->($c);
+ $output = $event->{event}->($c);
}
else {
- $c->forward( $event->{event} );
+ $output = $c->forward( $event->{event} );
}
};
my @errors = @{ $c->{error} };
$c->log->error(
'Scheduler: Error executing ' . "$event_name: $_" )
for @errors;
+ $output = join '; ', @errors;
}
- $c->_mark_finished($event);
+ $c->_mark_finished( $event, $output );
}
}
}
$c->NEXT::setup(@_);
}
+sub dump_these {
+ my $c = shift;
+
+ return ( $c->NEXT::dump_these(@_) ) unless @{ $c->_events };
+
+ # for debugging, we dump out a list of all events with their next
+ # scheduled run time
+ return (
+ $c->NEXT::dump_these(@_),
+ [ 'Scheduled Events', $c->scheduler_state ],
+ );
+}
+
+sub scheduler_state {
+ my $c = shift;
+
+ $c->_get_event_state();
+
+ my $conf = $c->config->{scheduler};
+ my $now = DateTime->now( time_zone => $conf->{time_zone} );
+
+ my $last_check = $c->_event_state->{last_check};
+ my $last_check_dt = DateTime->from_epoch(
+ epoch => $last_check,
+ time_zone => $conf->{time_zone},
+ );
+
+ my $event_dump = [];
+ for my $event ( @{ $c->_events } ) {
+ my $dump = {};
+ for my $key ( qw/at trigger event auto_run/ ) {
+ $dump->{$key} = $event->{$key} if $event->{$key};
+ }
+
+ # display the next run time
+ if ( $event->{set} ) {
+ my $next_run = $event->{set}->next($last_check_dt);
+ $dump->{next_run}
+ = $next_run->ymd
+ . q{ } . $next_run->hms
+ . q{ } . $next_run->time_zone_short_name;
+ }
+
+ # display the last run time
+ my $last_run
+ = $c->_event_state->{events}->{ $event->{event} }->{last_run};
+ if ( $last_run ) {
+ $last_run = DateTime->from_epoch(
+ epoch => $last_run,
+ time_zone => $conf->{time_zone},
+ );
+ $dump->{last_run}
+ = $last_run->ymd
+ . q{ } . $last_run->hms
+ . q{ } . $last_run->time_zone_short_name;
+ }
+
+ # display the result of the last run
+ my $output
+ = $c->_event_state->{events}->{ $event->{event} }->{last_output};
+ if ( $output ) {
+ $dump->{last_output} = $output;
+ }
+
+ push @{$event_dump}, $dump;
+ }
+
+ return $event_dump;
+}
+
# check and reload the YAML file with schedule data
sub _check_yaml {
my ($c) = @_;
my $mtime = ( stat $c->config->{scheduler}->{yaml_file} )->mtime;
if ( $mtime > $c->_event_state->{yaml_mtime}->{$$} ) {
$c->_event_state->{yaml_mtime}->{$$} = $mtime;
- $c->_save_event_state();
+ # clean up old PID files listed in yaml_mtime
+ foreach my $pid ( keys %{ $c->_event_state->{yaml_mtime} } ) {
+ if ( $c->_event_state->{yaml_mtime}->{$pid} < $mtime ) {
+ delete $c->_event_state->{yaml_mtime}->{$pid};
+ }
+ }
+ $c->_save_event_state();
+
# wipe out all current events and reload from YAML
$c->_events( [] );
my $yaml = YAML::LoadFile( $c->config->{scheduler}->{yaml_file} );
-
+
foreach my $event ( @{$yaml} ) {
$c->schedule( %{$event} );
}
}
};
if ($@) {
- $c->log->error("Error reading YAML file: $@");
+ $c->log->error("Scheduler: Error reading YAML file: $@");
}
}
# initialize the state file
$c->_event_state(
- { last_check => time,
- yaml_mtime => {},
+ { last_check => time,
+ events => {},
+ yaml_mtime => {},
}
);
$c->_save_event_state();
$c->_get_event_state();
- return if $c->_event_state->{ $event->{event} };
+ return if
+ $c->_event_state->{events}->{ $event->{event} }->{running};
# this is a 2-step process to prevent race conditions
# 1. write the state file with our PID
- $c->_event_state->{ $event->{event} } = $$;
+ $c->_event_state->{events}->{ $event->{event} }->{running} = $$;
$c->_save_event_state();
# 2. re-read the state file and make sure it's got the same PID
$c->_get_event_state();
- if ( $c->_event_state->{ $event->{event} } == $$ ) {
+ if ( $c->_event_state->{events}->{ $event->{event} }->{running} == $$ ) {
return 1;
}
# Mark an event as finished
sub _mark_finished {
- my ( $c, $event ) = @_;
+ my ( $c, $event, $output ) = @_;
- $c->_event_state->{ $event->{event} } = 0;
+ $c->_event_state->{events}->{ $event->{event} }->{running} = 0;
+ $c->_event_state->{events}->{ $event->{event} }->{last_run} = time;
+ $c->_event_state->{events}->{ $event->{event} }->{last_output} = $output;
$c->_save_event_state();
}
thu => 4,
fri => 5,
sat => 6,
-
+ );
+
+ my %replace_at = (
'yearly' => '0 0 1 1 *',
'annually' => '0 0 1 1 *',
'monthly' => '0 0 1 * *',
'midnight' => '0 0 * * *',
'hourly' => '0 * * * *',
);
+
+ if ( $cron =~ /^\@/ ) {
+ $cron =~ s/^\@//;
+ return $replace_at{ $cron };
+ }
for my $name ( keys %replace ) {
my $value = $replace{$name};
-
- if ( $cron =~ /^\@$name/ ) {
- $cron = $value;
- last;
- }
- else {
- $cron =~ s/$name/$value/i;
- last unless $cron =~ /\w/;
- }
+ $cron =~ s/$name/$value/i;
+ last unless $cron =~ /\w/;
}
-
return $cron;
}
Schedule is a class method for adding scheduled events. See the
L<"/SCHEDULING"> section for more information.
+=head2 scheduler_state
+
+The current state of all scheduled events is available in an easy-to-use
+format by calling $c->scheduler_state. You can use this data to build an
+admin view into the scheduling engine, for example. This same data is also
+displayed on the Catalyst debug screen.
+
+This method returns an array reference containing a hash reference for each
+event.
+
+ [
+ {
+ 'last_run' => '2005-12-29 16:29:33 EST',
+ 'auto_run' => 1,
+ 'last_output' => 1,
+ 'at' => '0 0 * * *',
+ 'next_run' => '2005-12-30 00:00:00 EST',
+ 'event' => '/cron/session_cleanup'
+ },
+ {
+ 'auto_run' => 1,
+ 'at' => '0 0 * * *',
+ 'next_run' => '2005-12-30 00:00:00 EST',
+ 'event' => '/cron/build_rss'
+ },
+ ]
+
=head1 INTERNAL METHODS
The following methods are extended by this plugin.
The main scheduling logic takes place during the dispatch phase.
+=item dump_these
+
+On the Catalyst debug screen, all scheduled events are displayed along with
+the next time they will be executed.
+
=item setup
=back
projects / catagits/Catalyst-Plugin-Scheduler.git / blobdiff