1MakeMethods::Emulator::USsienrglCeotnotnr(i3b)uted PerlMDaokceuMmeetnhtoadtsi:o:nEmulator::Singleton(3)
2
3
4

NAME

6       Class::MakeMethods::Emulator::Singleton - Emulate Class::Singleton
7

SYNOPSIS

9         use Class::MakeMethods::Emulator::Singleton;
10
11         # returns a new instance
12         my $one = Class::MakeMethods::Emulator::Singleton->instance();
13
14         # returns same instance
15         my $two = Class::MakeMethods::Emulator::Singleton->instance();
16

COMPATIBILITY

18       This module emulates the functionality of Class::Singleton, using
19       Class::MakeMethods to generate similar methods.
20
21       You may use it directly, as shown in the SYNOPSIS above,
22
23       Furthermore, you may call  "use Class::MakeMethods::Emulator::Singleton
24       '-take_namespace';" to alias the Class::Singleton namespace to this
25       package, and subsequent calls to the original package will be
26       transparently handled by this emulator. To remove the emulation
27       aliasing, call "use Class::MakeMethods::Emulator::Singleton
28       '-release_namespace'".
29
30       Caution: This affects all subsequent uses of Class::Singleton in your
31       program, including those in other modules, and might cause unexpected
32       effects.
33

DESCRIPTION

35       A Singleton describes an object class that can have only one instance
36       in any system.  An example of a Singleton might be a print spooler or
37       system registry.  This module implements a Singleton class from which
38       other classes can be derived.  By itself, the Class::Singleton module
39       does very little other than manage the instantiation of a single
40       object.  In deriving a class from Class::Singleton, your module will
41       inherit the Singleton instantiation method and can implement whatever
42       specific functionality is required.
43

SEE ALSO

45       See Class::MakeMethods for general information about this distribution.
46
47       See Class::MakeMethods::Emulator for more about this family of
48       subclasses.
49
50       See Class::Singleton for documentation of the original module.
51
52       For a description and discussion of the Singleton class, see "Design
53       Patterns", Gamma et al, Addison-Wesley, 1995, ISBN 0-201-63361-2.
54
55       See "new" in Class::MakeMethods::Hash and "instance" in
56       Class::MakeMethods::ClassVar for documentation of the created methods.
57
58
59
60perl v5.32.1                      2021-01-27MakeMethods::Emulator::Singleton(3)
Impressum