Root at 20:59, 20 October 2025

2025-10-20T20:59:44Z

← Older revision		Revision as of 21:59, 20 October 2025
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	Define a family of algorithms, encapsulate each one, and make them interchangeable.		Define a family of algorithms, encapsulate each one, and make them interchangeable.

	<syntaxhighlight>interface SortingStrategy {		<syntaxhighlight lang="php">interface SortingStrategy {
	public function sort(array $data): array;		public function sort(array $data): array;
	}		}
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	public function __construct(SortingStrategy $strategy) {		public function __construct(SortingStrategy $strategy) {
	$this-~~>~~strategy = $strategy;		$this->strategy = $strategy;
	}		}

	public function setStrategy(SortingStrategy $strategy) {		public function setStrategy(SortingStrategy $strategy) {
	$this-~~>~~strategy = $strategy;		$this->strategy = $strategy;
	}		}

	public function sort(array $data): array {		public function sort(array $data): array {
	return $this-~~>~~strategy-~~>~~sort($data);		return $this->strategy->sort($data);
	}		}
	}		}

	$sorter = new Sorter(new BubbleSort());		$sorter = new Sorter(new BubbleSort());
	$sortedData = $sorter-~~>~~sort([4, 2, 8, 5]);</syntaxhighlight>		$sortedData = $sorter->sort([4, 2, 8, 5]);</syntaxhighlight>
	<span id="observer-pattern"></span>		<span id="observer-pattern"></span>
	== Observer Pattern ==		== Observer Pattern ==
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	One-to-many dependency between objects so when one object changes state, all its dependents are notified.		One-to-many dependency between objects so when one object changes state, all its dependents are notified.

	<syntaxhighlight>interface Observer {		<syntaxhighlight lang="php">interface Observer {
	public function update($message);		public function update($message);
	}		}
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	public function attach(Observer $observer) {		public function attach(Observer $observer) {
	$this-~~>~~observers[] = $observer;		$this->observers[] = $observer;
	}		}

	public function detach(Observer $observer) {		public function detach(Observer $observer) {
	$key = array_search($observer, $this-~~>~~observers, true);		$key = array_search($observer, $this->observers, true);
	if ($key) {		if ($key) {
	unset($this-~~>~~observers[$key]);		unset($this->observers[$key]);
	}		}
	}		}

	public function notify($message) {		public function notify($message) {
	foreach ($this-~~>~~observers as $observer) {		foreach ($this->observers as $observer) {
	$observer-~~>~~update($message);		$observer->update($message);
	}		}
	}		}
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	class ConcreteObserver implements Observer {		class ConcreteObserver implements Observer {
	public function update($message) {		public function update($message) {
	echo ~~"~~Observer received: $message\n~~"~~;		echo "Observer received: $message\n";
	}		}
	}		}
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	$subject = new ConcreteSubject();		$subject = new ConcreteSubject();
	$observer = new ConcreteObserver();		$observer = new ConcreteObserver();
	$subject-~~>~~attach($observer);		$subject->attach($observer);
	$subject-~~>~~notify('Hello, Observers!');</syntaxhighlight>		$subject->notify('Hello, Observers!');</syntaxhighlight>
	<span id="command-pattern"></span>		<span id="command-pattern"></span>
	== Command Pattern ==		== Command Pattern ==
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	Encapsulate a request as an object, allowing for parameterization and other operations.		Encapsulate a request as an object, allowing for parameterization and other operations.

	<syntaxhighlight>interface Command {		<syntaxhighlight lang="php">interface Command {
	public function execute();		public function execute();
	}		}
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	class Light {		class Light {
	public function turnOn() {		public function turnOn() {
	echo ~~"~~Light is ON\n~~"~~;		echo "Light is ON\n";
	}		}

	public function turnOff() {		public function turnOff() {
	echo ~~"~~Light is OFF\n~~"~~;		echo "Light is OFF\n";
	}		}
	}		}
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	public function __construct(Light $light) {		public function __construct(Light $light) {
	$this-~~>~~light = $light;		$this->light = $light;
	}		}

	public function execute() {		public function execute() {
	$this-~~>~~light-~~>~~turnOn();		$this->light->turnOn();
	}		}
	}		}
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	public function __construct(Light $light) {		public function __construct(Light $light) {
	$this-~~>~~light = $light;		$this->light = $light;
	}		}

	public function execute() {		public function execute() {
	$this-~~>~~light-~~>~~turnOff();		$this->light->turnOff();
	}		}
	}		}
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	class RemoteControl {		class RemoteControl {
	public function submit(Command $command) {		public function submit(Command $command) {
	$command-~~>~~execute();		$command->execute();
	}		}
	}		}
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	$turnOff = new TurnOffLightCommand($light);		$turnOff = new TurnOffLightCommand($light);
	$remote = new RemoteControl();		$remote = new RemoteControl();
	$remote-~~>~~submit($turnOn); // Output: Light is ON		$remote->submit($turnOn); // Output: Light is ON
	$remote-~~>~~submit($turnOff); // Output: Light is OFF</syntaxhighlight>		$remote->submit($turnOff); // Output: Light is OFF</syntaxhighlight>
	~~<!-- From bodyContent 1543037.mraw --~~>

	[[Category:IT backend patterns]]		[[Category:IT backend patterns]]

Maintenance script: Added category IT backend patterns

2025-10-19T17:51:19Z

Added category IT backend patterns

← Older revision		Revision as of 18:51, 19 October 2025
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	<!-- From bodyContent 1543037.mraw -->		<!-- From bodyContent 1543037.mraw -->

			[[Category:IT backend patterns]]

Maintenance script: Maintenance script moved page UserDocumentation:Knowledge Central/KC IT/IT backend team/IT backend policies/IT backend patterns/IT behavioral pattern to IT behavioral pattern: Cleaned title and categorized

2025-10-19T17:51:19Z

Maintenance script moved page UserDocumentation:Knowledge Central/KC IT/IT backend team/IT backend policies/IT backend patterns/IT behavioral pattern to IT behavioral pattern: Cleaned title and categorized

← Older revision	Revision as of 18:51, 19 October 2025
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2025-04-19T10:11:08Z

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imported>Unknown user at 10:11, 19 April 2025

2025-04-19T10:11:08Z

← Older revision	Revision as of 11:11, 19 April 2025
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imported>Unknown user at 10:11, 19 April 2025

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IT behavioral pattern - Revision history

Root at 20:59, 20 October 2025

Maintenance script: Added category IT backend patterns

Maintenance script: Maintenance script moved page UserDocumentation:Knowledge Central/KC IT/IT backend team/IT backend policies/IT backend patterns/IT behavioral pattern to IT behavioral pattern: Cleaned title and categorized

imported>Unknown user at 10:11, 19 April 2025

imported>Unknown user at 10:11, 19 April 2025

imported>Unknown user at 10:11, 19 April 2025