87 lines
3.1 KiB
RPMSpec
87 lines
3.1 KiB
RPMSpec
#
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# spec file for package perl-Class-StrongSingleton
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#
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# Copyright (c) 2024 SUSE LLC
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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 https://bugs.opensuse.org/
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#
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%define cpan_name Class-StrongSingleton
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Name: perl-Class-StrongSingleton
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Version: 0.20.0
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Release: 0
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# 0.02 -> normalize -> 0.20.0
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%define cpan_version 0.02
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License: Artistic-1.0 OR GPL-1.0-or-later
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Summary: Stronger and more secure Singleton base class
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URL: https://metacpan.org/release/%{cpan_name}
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Source0: https://cpan.metacpan.org/authors/id/S/ST/STEVAN/%{cpan_name}-%{cpan_version}.tar.gz
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Source100: README.md
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BuildArch: noarch
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BuildRequires: perl
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BuildRequires: perl-macros
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Provides: perl(Class::StrongSingleton) = %{version}
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%undefine __perllib_provides
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%{perl_requires}
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%description
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This module is an alternative to Class::Singleton and Class::WeakSingleton,
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and provides a more secure Singleton class in that it takes steps to
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prevent the possibility of accidental creation of multiple instances and/or
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the overwriting of existsing Singleton instances. For a detailed comparison
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please see the SEE ALSO section.
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Here is a description of how it all works. First, the user creates the
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first Singleton instance of the class in the normal way.
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my $obj = My::Singleton::Class->new("variable", "parameter");
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This instance is then stored inside a lexically scoped variable within the
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Class::StrongSingleton package. This prevents the variable from being
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accessed by anything but methods from the Class::StrongSingleton package.
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At this point as well, the 'new' method to the class is overridden so that
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it will always return the Singleton instance. This prevents any accidental
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overwriting of the Singleton instance. This means that any of the follow
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lines of code all produce the same instance:
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my $instance = $obj->instance();
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my $instance = My::Singleton::Class->instance();
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my $instance = $obj->new();
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my $instance = My::Singleton::Class->new();
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Personally, I see this an an improvement over the usual _Gang of Four_
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style Singletons which discourages the use of the 'new' method entirely.
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Through this method, a user can be able to use the Singleton class in a
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normal way, not having to know it's actually a Singleton. This can be handy
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if your design changes and you no longer need the class as a Singleton.
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%prep
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%autosetup -n %{cpan_name}-%{cpan_version}
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%build
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perl Makefile.PL INSTALLDIRS=vendor
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%make_build
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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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%files -f %{name}.files
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%doc Changes README
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%changelog
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