AEAE - the Ajax Enhanced Asynchroneous Experience.
Version 0.02
This module enables you to quickly implement long duration task at server side while allowing the user to control those task at client side with an ajaxed page showing a progress bar and control button.
http://jerome.eteve.free.fr/article.php3?id_article=26
This distribution is compatible (means tested and works) with:
At server side: POSIX capable system (linux tested), apache(2.x tested).
At client side: FF1.5 (tested), IE5 (tested), IE6 (tested).
No java, no flash, nothing but plain javascript.
To use AEAE, you only got two things to write:
For this just make a class that inherits from AEAE::Command, and simply implement the _doIt() method.
See the AEAE::ComandExample :
(extract):
sub _doItReal{
my $self = shift ;
my $mustDie = shift ;
my $i = 0 ;
print "Let us start !\n";
local $| = 1 ;
while( $i < 101){
$AEAE::Command::processCommand->oneStep($i);
print STDERR "We are here:".$i."\n";
print STDOUT "Step ".$i."\n";
$i += 5 ;
sleep(1);
if( ( $i > 70 ) && $mustDie){ confess( "An horrible error" );}
}
print "Now its over!\n";
}
See AEAE::Command for full doc and AEAE::CommandExample for full example!
The importants things are:
- All you need to do is to implement your task just as if would be a regular one. Dont worry about synchroneous issues.
- All you write on STDOUT and STDERR will be visible to the final user, so dont be too wordy.
- If you die or confess, the error message will be visible to the user, so be clear!
- You got to use the $AEAE::Command::processCommand->oneStep(<number>); to gives information to the user on how much your task is complete. If number >= 100, your task will be considered as complete (thus eliminated) by the system, so give number between 1 and 99 !
Once your command is written, you got to write the cgi that will generate your web interface. For that, you will use the AEAE::AsyncCGIPage module.
Just a simple example:
#! /usr/bin/perl -w
use AEAE::AsyncCGIPage ;
use strict ;
use CGI ;
my $c = new CGI ;
my $page = AEAE::AsyncCGIPage->new($c,1);
$page->command('AEAE::CommandExample');
$page->arguments([0]);
$page->debug(1);
print $page->generateAjaxedHTML();
This CGI generates an ajaxed page that will control the AEAE::CommandExample and will give it the argument '0' .
The debug(1) makes ajax call appears in the page.
See AEAE::AsyncCGIPage for full documentation about all features.
This distribution hardly depends on the wonderfull CGI::Ajax module.
Jerome Eteve, <jerome@eteve.net> Core dev. Yannick Lesage, <yan.lesage@free.fr> Design, testing and advices.
Please report any bugs or feature requests to bug-aeae@rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=AEAE. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.
Copyright 2006 Jerome Eteve, Yannick Lesage all rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
