forked from perl/perl-Parallel-ForkManager
107 lines
3.2 KiB
RPMSpec
107 lines
3.2 KiB
RPMSpec
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# spec file for package perl-Parallel-ForkManager (Version 0.7.9)
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#
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# Copyright (c) 2010 SUSE LINUX Products GmbH, Nuernberg, Germany.
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#
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# All modifications and additions to the file contributed by third parties
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# remain the property of their copyright owners, unless otherwise agreed
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# upon. The license for this file, and modifications and additions to the
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# file, is the same license as for the pristine package itself (unless the
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# license for the pristine package is not an Open Source License, in which
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# case the license is the MIT License). An "Open Source License" is a
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# license that conforms to the Open Source Definition (Version 1.9)
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# published by the Open Source Initiative.
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# Please submit bugfixes or comments via http://bugs.opensuse.org/
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#
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Name: perl-Parallel-ForkManager
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Version: 0.7.9
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Release: 1
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License: GPL+ or Artistic
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%define cpan_name Parallel-ForkManager
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Summary: A simple parallel processing fork manager
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Url: http://search.cpan.org/dist/Parallel-ForkManager/
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Group: Development/Libraries/Perl
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Source: http://www.cpan.org/authors/id/D/DL/DLUX/%{cpan_name}-%{version}.tar.gz
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BuildArch: noarch
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BuildRoot: %{_tmppath}/%{name}-%{version}-build
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BuildRequires: perl
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BuildRequires: perl-macros
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BuildRequires: perl(ExtUtils::MakeMaker)
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%{perl_requires}
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%description
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This module is intended for use in operations that can be done in parallel
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where the number of processes to be forked off should be limited. Typical
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use is a downloader which will be retrieving hundreds/thousands of files.
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The code for a downloader would look something like this:
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use LWP::Simple;
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use Parallel::ForkManager;
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...
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@links=(
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["http://www.foo.bar/rulez.data","rulez_data.txt"],
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["http://new.host/more_data.doc","more_data.doc"],
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...
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);
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...
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# Max 30 processes for parallel download
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my $pm = new Parallel::ForkManager(30);
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foreach my $linkarray (@links) {
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$pm->start and next; # do the fork
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my ($link,$fn) = @$linkarray;
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warn "Cannot get $fn from $link"
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if getstore($link,$fn) != RC_OK;
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$pm->finish; # do the exit in the child process
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}
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$pm->wait_all_children;
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First you need to instantiate the ForkManager with the "new" constructor.
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You must specify the maximum number of processes to be created. If you
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specify 0, then NO fork will be done; this is good for debugging purposes.
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Next, use $pm->start to do the fork. $pm returns 0 for the child process,
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and child pid for the parent process (see also the perlfunc(1p)/fork()
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manpage). The "and next" skips the internal loop in the parent process.
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NOTE: $pm->start dies if the fork fails.
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$pm->finish terminates the child process (assuming a fork was done in the
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"start").
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NOTE: You cannot use $pm->start if you are already in the child process. If
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you want to manage another set of subprocesses in the child process, you
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must instantiate another Parallel::ForkManager object!
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%prep
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%setup -q -n %{cpan_name}-%{version}
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%build
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%{__perl} Makefile.PL INSTALLDIRS=vendor
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%{__make} %{?_smp_mflags}
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%check
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%{__make} test
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%install
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%perl_make_install
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%perl_process_packlist
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%perl_gen_filelist
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%clean
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%{__rm} -rf %{buildroot}
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%files -f %{name}.files
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%defattr(-,root,root,755)
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%doc Changes examples TODO
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%changelog
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