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

         Joern Reder <joern at zyn dot de>

COPYRIGHT AND LICENSE

       Copyright 2005-2006 by Joern Reder.

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