Event::ExecFlow - High level API for event-based execution flow control
This is release has nearly no documentation yet. If you're interested in the
details please contact the author.
Event::ExecFlow provides a ligh level API for defining complex flow controls
with asynchronous execution of external programs.
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);
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.
Event::ExecFlow requires the follwing Perl modules:
AnyEvent >= 0.04
Locale::TextDomain
Test::More
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
Jörn Reder <joern at zyn dot de>
Copyright 2005-2006 by Jörn Reder.
This library is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
Hey!
The above document had some coding errors, which are explained
below:
- Around line 122:
- Non-ASCII character seen before =encoding in 'Jörn'. Assuming
CP1252