1Event::ExecFlow(3)    User Contributed Perl Documentation   Event::ExecFlow(3)
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NAME

6       Event::ExecFlow - High level API for event-based execution flow control
7

NOTE

9       This is release has nearly no documentation yet.  If you're interested
10       in the details please contact the author.
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ABSTRACT

13       Event::ExecFlow provides a ligh level API for defining complex flow
14       controls with asynchronous execution of external programs.
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SYNOPSIS

17         use Event::ExecFlow;
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19         my $job = Event::ExecFlow::Job::Group->new (
20           jobs => [
21             Event::ExecFlow::Job::Command->new (
22               name            => "transcode",
23               title           => "Transcoding DVD title to OGG",
24               command         => "transcode -i /dev/dvd ...",
25               fetch_output    => 1,
26               progress_max    => 4711, # number of frames
27               progress_parser => sub {
28                 my ($job, $buffer) = @_;
29                 $job->set_progress_cnt($1) if $buffer =~ /\[\d+-(\d+)\]/;
30                 #-- or simply write this:
31                 #--   progress_parser => qr/\[\d+-(\d+)\]/,
32               },
33             ),
34             Event::ExecFlow::Job::Code->new (
35               name          => "checks",
36               title         => "Do some checks",
37               depends_on    => [ "transcode" ],
38               code          => sub {
39                 my ($job) = @_;
40                 my $transcode = $job->get_group->get_job_by_name("transcode");
41                 if ( $transcode->get_output !~ /.../ ) {
42                   $job->set_error_message("XY check failed");
43                 }
44                 #-- this could be done easier as a post_callback added to
45                 #-- the "transcode" job above, but it's nevertheless a good
46                 #-- example for the 'Code' job type and shows how jobs can
47                 #-- interfere with each other.
48               },
49             ),
50             Event::ExecFlow::Job::Command->new (
51               title         => "Muxing OGG file",
52               depends_on    => [ "checks" ],
53               command       => "ogmmerge ...",
54               no_progress   => 1,
55             ),
56           ],
57         );
58
59         #-- this inherits from Event::ExecFlow::Frontend
60         my $frontend = Video::DVDRip::GUI::ExecFlow->new(...);
61         $frontend->start_job($job);
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DESCRIPTION

64       Event::ExecFlow offers a high level API to declare jobs, which mainly
65       execute external commands, parse their output to get progress or other
66       status information, triggers actions when the command has been finished
67       etc. Such jobs can be chained together in a recursive fashion to
68       fulfill rather complex tasks which consist of many jobs.
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70       Additionally it defines an extensible API for communication with the
71       frontend application, which may be a written using Gtk2, Tk or Qt or is
72       a simple text console program.
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74       In case of Gtk2 a custom widget for displaying an Event::ExecFlow job
75       plan, including progress updates, is shipped with the
76       Gtk2::Ex::FormFactory package.
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REQUIREMENTS

79       Event::ExecFlow requires the follwing Perl modules:
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81         AnyEvent           >= 0.04
82         Locale::TextDomain
83         Test::More
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INSTALLATION

86       You get the latest installation tarballs and online documentation at
87       this location:
88
89         http://www.exit1.org/Event-ExecFlow/
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91       If your system meets the requirements mentioned above, installation is
92       just:
93
94         perl Makefile.PL
95         make test
96         make install
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AUTHORS

99         Jörn Reder <joern at zyn dot de>
100
102       Copyright 2005-2006 by Jörn Reder.
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104       This library is free software; you can redistribute it and/or modify it
105       under the same terms as Perl itself.
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POD ERRORS

108       Hey! The above document had some coding errors, which are explained
109       below:
110
111       Around line 122:
112           Non-ASCII character seen before =encoding in 'Jörn'. Assuming UTF-8
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116perl v5.34.0                      2022-01-21                Event::ExecFlow(3)
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