/ 
Event-Lite-0.001
/ Event::Lite

NAME

Event::Lite - Distributed Event Broadcast System for Perl

SYNOPSIS

NOTE: - The synopses are subject to drastic change, as this code is still alpha.

Server

package MyServer;
use base 'Event::Lite::Server';
use Carp 'confess';

my $s = __PACKAGE__->new( ... );

eval { $s->run() };
confess "Error: $@";

Publisher

my $pub = Event::Lite::Publisher->new( ... );
$pub->notify(
  source  => $self,
  event   => 'name-of-event',
  ...
  # Anything else is passed along as properties of the event
);

Subscriber

package MySubscriber;
use base 'Event::Lite::Subscriber';
use Carp 'confess';

my $s = __PACKAGE__->new( ... );
while( my $event = eval { $s->event('name-of-event') } )
{
  # Process our event:
}# end while()

confess "Fell out of loop: $@";

DESCRIPTION

Event::Lite aims to provide a distributed event broadcast system for Perl.

This means that an event (i.e. Price of Tea in China (PTC) changes) can occur in one system, and any number of "subscriber" systems can be instantly notified, regardless of whether they are on the same system or network.

Architecture

Event::Lite basically has 4 components:

  • Server

    The part responsible for connecting the other 3 parts together.

  • Publisher

    The where events are generated.

  • Event

    An object that describes the Who, What, When, Where, Why and How of what happened.

  • Subscriber

    Something that cares about a specific kind of event. It can expect the server to let it know when that kind of event happens.

Protocol

Because this is supposed to be lightweight and entirely focused on just the event broadcast aspect, a simple text-based protocol will be used. While XMPP might be much more robust, this module is designed with simplicity in mind - first and foremost.

Limitations

One of the goals of Event::Lite is to not have any arbitrary limitations.

I fully expect Event::Lite to scale to thousands of events, thousands of subscribers and to perform on par with any commercial system currently out there.

I also fully expect Event::Lite to be satisfactory for use in mission-critical systems like stock trading platforms, nuclear missile silos and garage door openers.

If you think garage door openers are not mission-critical, think again.

SUPPORT

Visit http://www.devstack.com/contact/ or email the author at <jdrago_999@yahoo.com>

Commercial support and installation is available.

AUTHOR

John Drago <jdrago_999@yahoo.com>

COPYRIGHT AND LICENSE

Copyright (C) 2008 by John Drago

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available.