Singleton: Difference between revisions

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__NOTOC__
{{Useful Class}}
{{Useful Class}}
{{Needs_Example}}
<lowercasetitle/>
__NOTOC__
This class allows you to restrict the instantiation of a specific class to one object.
This class allows you to restrict the instantiation of a specific class to one object.


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sbx320's classLib, can be found Here[https://github.com/sbx320/lua_utils/blob/master/classlib.lua]
sbx320's classLib, can be found Here[https://github.com/sbx320/lua_utils/blob/master/classlib.lua]
OOP on


==Code==
==Code==
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end
end
</syntaxhighlight>
</syntaxhighlight>
Original Author: Jusonex


'''Call class methods by newest instance'''
==Example==
==Example==
<section name="Example" class="client" show="false">
<syntaxhighlight lang="lua">
<syntaxhighlight lang="lua">
-- TODO
-- DEFINE CLASS
TestClass = inherit(Singleton)
 
function TestClass:run()
  -- DO SOMETHING
end
 
TestClass:getSingleton():run()
</syntaxhighlight>
</syntaxhighlight>
</section>
 
==See Also==
==See Also==
{{Useful_Classes}}
{{Useful_Classes}}

Latest revision as of 12:52, 14 February 2024

This class allows you to restrict the instantiation of a specific class to one object.

Requirements

sbx320's classLib, can be found Here[1]

OOP on

Code

Singleton = {}

function Singleton:getSingleton(...)
	if not self.ms_Instance then
		self.ms_Instance = self:new(...)
	end
	return self.ms_Instance
end

function Singleton:new(...)
	self.new = function() end
	local inst = new(self, ...)
	self.ms_Instance = inst
	return inst
end

function Singleton:isInstantiated()
	return self.ms_Instance ~= nil
end

function Singleton:virtual_destructor()
	for k, v in pairs(super(self)) do
		v.ms_Instance = nil
		v.new = Singleton.new
	end
end

Call class methods by newest instance

Example

-- DEFINE CLASS
TestClass = inherit(Singleton)

function TestClass:run()
   -- DO SOMETHING
end

TestClass:getSingleton():run()

See Also

  • Singleton » This class allows to restrict the instantiation of a specific class to one object.
  • CThread » This class represents a simple coroutine manager which can be used to limit method calls / loop.
  • Importer » This class make easy to use exported functions.
  • Observable » Observable variables. Call function on variable value change.
  • MatrixPOP » This class allows to use simple matrix without using MTA's OOP functions