Rocco Caputo > Reflex-0.099 > Reflex::Role::Wakeup

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NAME ^

Reflex::Role::Wakeup - set a wakeup callback for a particular UNIX time

VERSION ^

This document describes version 0.099, released on April 21, 2013.

SYNOPSIS ^

        package Reflex::Wakeup;

        use Moose;
        extends 'Reflex::Base';

        has when => ( isa => 'Num', is  => 'rw' );

        with 'Reflex::Role::Wakeup' => {
                when          => "when",
                cb_wakeup     => "on_time",
                method_stop   => "stop",
                method_reset  => "reset",
        };

        1;

DESCRIPTION ^

Reflex::Role::Wakeup is a parameterized role. Each time it's consumed, it adds another non-blocking wakeup callback to a class. These callback will be invoked at particular UNIX times, established by the contents of the "when" attributes named at composition time.

Reflex::Wakeup in the SYNOPSIS consumes a single Reflex::Role::Wakeup. The parameters define the names of attributes that control the timer's behavior, the names of callback methods, and the names of methods that manipulate the timer.

Required Role Parameters

None. All role parameters have defaults.

Optional Role Parameters

when

when names an attribute in the consumer that must hold the role's wakeup time. Wakeup times are specified as seconds since the UNIX epoch. Reflex usually supports fractional seconds, but this ultimately depends on the event loop being used.

Refex::Role::Wakeup uses the attribute name in when to differentiate between multiple applications of the same role to the same class. Reflex roles are building blocks of program behavior, and it's reasonable to expect a class to need multiple building blocks of the same type. For instance, multiple wakeup timers for different purposes.

method_stop

Reflex::Role::Wakeup will provide a method to stop the timer. This method will become part of the consuming class, per Moose. method_stop allows the consumer to define the name of that method. By default, the method will be named:

        $method_stop = "stop_" . $when_name;

where $when_name is the attribute name supplied by the when parameter.

The stop method neither takes parameters nor returns anything.

method_reset

method_reset allows the role's consumer to override the default reset method name. The default is "stop_${when_name}", where $when_name is the attribute name provided in the when parameter.

All Reflex methods accept a hashref of named parameters. Currently the reset method accepts one named parameter, "when". The value of "when" must be the new time to trigger a callback. If "when" isn't provided, the wakeup callback will happen at the previous time set by this module.

        $self->reset_name( { when => time() + 60 } );

One may also set the when() attribute and reset() the timer as two distinct calls.

        $self->time( time() + 60 );  # 60 seconds from now
        $self->reset_time();

cb_wakeup

cb_wakeup overrides the default method name that will be called when the "when" time arrives. The default is "on_${when_name}_wakeup".

These callbacks receive no paramaters.

EXAMPLES ^

Reflex::Wakeup is one example of using Reflex::Role::Wakeup.

SEE ALSO ^

Please see those modules/websites for more information related to this module.

BUGS AND LIMITATIONS ^

You can make new bug reports, and view existing ones, through the web interface at http://rt.cpan.org/Public/Dist/Display.html?Name=Reflex.

AUTHOR ^

Rocco Caputo <rcaputo@cpan.org>

COPYRIGHT AND LICENSE ^

This software is copyright (c) 2013 by Rocco Caputo.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

AVAILABILITY ^

The latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit http://www.perl.com/CPAN/ to find a CPAN site near you, or see https://metacpan.org/module/Reflex/.

DISCLAIMER OF WARRANTY ^

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

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