NAME
Event::ExecFlow - High level API for event-based execution flow control
NOTE
This is release has nearly no documentation yet. If you're interested in
the details please contact the author.
ABSTRACT
Event::ExecFlow provides a ligh level API for defining complex flow
controls with asynchronous execution of external programs.
SYNOPSIS
use Event::ExecFlow;
my $job = Event::ExecFlow::Job::Group->new (
jobs => [
Event::ExecFlow::Job::Command->new (
name => "transcode",
title => "Transcoding DVD title to OGG",
command => "transcode -i /dev/dvd ...",
fetch_output => 1,
progress_max => 4711, # number of frames
progress_parser => sub {
my ($job, $buffer) = @_;
$job->set_progress_cnt($1) if $buffer =~ /\[\d+-(\d+)\]/;
#-- or simply write this:
#-- progress_parser => qr/\[\d+-(\d+)\]/,
},
),
Event::ExecFlow::Job::Code->new (
name => "checks",
title => "Do some checks",
depends_on => [ "transcode" ],
code => sub {
my ($job) = @_;
my $transcode = $job->get_group->get_job_by_name("transcode");
if ( $transcode->get_output !~ /.../ ) {
$job->set_error_message("XY check failed");
}
#-- this could be done easier as a post_callback added to
#-- the "transcode" job above, but it's nevertheless a good
#-- example for the 'Code' job type and shows how jobs can
#-- interfere with each other.
},
),
Event::ExecFlow::Job::Command->new (
title => "Muxing OGG file",
depends_on => [ "checks" ],
command => "ogmmerge ...",
no_progress => 1,
),
],
);
#-- this inherits from Event::ExecFlow::Frontend
my $frontend = Video::DVDRip::GUI::ExecFlow->new(...);
$frontend->start_job($job);
DESCRIPTION
Event::ExecFlow offers a high level API to declare jobs, which mainly
execute external commands, parse their output to get progress or other
status information, triggers actions when the command has been finished
etc. Such jobs can be chained together in a recursive fashion to fulfill
rather complex tasks which consist of many jobs.
Additionally it defines an extensible API for communication with the
frontend application, which may be a written using Gtk2, Tk or Qt or is
a simple text console program.
In case of Gtk2 a custom widget for displaying an Event::ExecFlow job
plan, including progress updates, is shipped with the
Gtk2::Ex::FormFactory package.
REQUIREMENTS
Event::ExecFlow requires the follwing Perl modules:
AnyEvent >= 0.04
Locale::TextDomain
Test::More
INSTALLATION
You get the latest installation tarballs and online documentation at
this location:
http://www.exit1.org/Event-ExecFlow/
If your system meets the requirements mentioned above, installation is
just:
perl Makefile.PL
make test
make install
AUTHORS
J�rn Reder <joern at zyn dot de>
COPYRIGHT AND LICENSE
Copyright 2005-2006 by J�rn Reder.
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
