POE::Component::Schedule(3) Schedule POE events using DateTime::Set iterators


use POE qw(Component::Schedule);
use DateTime::Set;
inline_states => {
_start => sub {
$_[HEAP]{sched} = POE::Component::Schedule->add(
$_[SESSION], Tick => DateTime::Set->from_recurrence(
after => DateTime->now,
before => DateTime->now->add(seconds => 3),
recurrence => sub {
return $_[0]->truncate( to => 'second' )->add( seconds => 1 )
Tick => sub {
print 'tick ', scalar localtime, "\n";
remove_sched => sub {
# Three ways to remove a schedule
# The first one is only for API compatibility with POE::Component::Cron
$_[HEAP]{sched} = undef;
delete $_[HEAP]{sched};
_stop => sub {
print "_stop\n";


This component encapsulates a session that sends events to client sessions on a schedule as defined by a DateTime::Set iterator.

POE::Component::Schedule METHODS

spawn(Alias => name)

Start up the PoCo::Schedule background session with the given alias. Returns the back-end session handle.

No need to call this in normal use, "add()" and "new()" all crank one of these up if it is needed.

add($session, $event_name, $iterator, @event_args)

    my $sched = POE::Component::Schedule->add(

Add a set of events to the scheduler.

Returns a schedule handle. The event is automatically deleted when the handle is not referenced anymore.

new($session, $event_name, $iterator, @event_args)

"new()" is an alias for "add()".



Removes a schedule using the handle returned from "add()" or "new()".

DEPRECATED: Schedules are now automatically deleted when they are not referenced anymore. So just setting the container variable to "undef" will delete the schedule.


You can look for information at:


This module was a friendly fork of POE::Component::Cron to extract the generic parts and isolate the Cron specific code in order to reduce dependencies on other CPAN modules.

See <https://rt.cpan.org/Ticket/Display.html?id=44442>.

The orignal author of POE::Component::Cron is Chris Fedde.

POE::Component::Cron is now implemented as a class that inherits from POE::Component::Schedule.

Most of the POE::Component::Schedule internals have since been rewritten in 0.91_01 and we have now a complete test suite.


Olivier Mengue, "[email protected]"
Chris Fedde, "[email protected]"


Copyright X 2009-2010 Olivier Mengue.
Copyright X 2007-2008 Chris Fedde.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.3 or, at your option, any later version of Perl 5 you may have available.