Singleton pattern
E679874
The Singleton pattern is a creational design pattern that ensures a class has only one globally accessible instance, commonly used to provide shared resources or centralized control in software systems.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Monostate pattern | 1 |
| Singleton pattern canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7665520 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Singleton pattern Context triple: [Flyweight, oftenUsedWith, Singleton pattern]
-
A.
Singleton
Singleton is a town in the Hunter Region of New South Wales, Australia, known for its coal mining, agriculture, and proximity to the Hunter Valley wine region.
-
B.
Singleton
Singleton is the middle name of John S. Mosby, the famed Confederate cavalry commander and guerrilla leader known as the "Gray Ghost" during the American Civil War.
-
C.
Factory Method
Factory Method is a creational design pattern that defines an interface for creating objects while allowing subclasses to decide which concrete classes to instantiate, promoting loose coupling and extensibility.
-
D.
Design Patterns: Elements of Reusable Object-Oriented Software
Design Patterns: Elements of Reusable Object-Oriented Software is a seminal software engineering book by the "Gang of Four" that catalogues foundational object-oriented design patterns widely used in software development.
-
E.
Single Responsibility Principle
The Single Responsibility Principle is a core object-oriented design guideline stating that a class or module should have only one reason to change, meaning it should be responsible for just a single, well-defined functionality.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Singleton pattern Target entity description: The Singleton pattern is a creational design pattern that ensures a class has only one globally accessible instance, commonly used to provide shared resources or centralized control in software systems.
-
A.
Singleton
Singleton is a town in the Hunter Region of New South Wales, Australia, known for its coal mining, agriculture, and proximity to the Hunter Valley wine region.
-
B.
Singleton
Singleton is the middle name of John S. Mosby, the famed Confederate cavalry commander and guerrilla leader known as the "Gray Ghost" during the American Civil War.
-
C.
Factory Method
Factory Method is a creational design pattern that defines an interface for creating objects while allowing subclasses to decide which concrete classes to instantiate, promoting loose coupling and extensibility.
-
D.
Design Patterns: Elements of Reusable Object-Oriented Software
Design Patterns: Elements of Reusable Object-Oriented Software is a seminal software engineering book by the "Gang of Four" that catalogues foundational object-oriented design patterns widely used in software development.
-
E.
Single Responsibility Principle
The Single Responsibility Principle is a core object-oriented design guideline stating that a class or module should have only one reason to change, meaning it should be responsible for just a single, well-defined functionality.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
creational design pattern
ⓘ
software design pattern ⓘ |
| aimsTo |
control object creation
ⓘ
prevent multiple instances of a class ⓘ |
| alternativeTo | dependency injection in some scenarios ⓘ |
| belongsTo |
Gang of Four design patterns
ⓘ
linked to:
Gang of Four design pattern
|
| canCause |
difficulty in unit testing
ⓘ
global state issues ⓘ hidden dependencies ⓘ tight coupling ⓘ |
| category | creational pattern ⓘ |
| commonIn |
application-wide registries
ⓘ
caches ⓘ configuration managers ⓘ connection pools ⓘ logging components ⓘ |
| criticizedFor |
encouraging global state
ⓘ
hindering parallelism if not thread-safe ⓘ reducing testability ⓘ |
| defines | a static method to access the instance ⓘ |
| describedIn | Design Patterns: Elements of Reusable Object-Oriented Software ⓘ |
| ensures |
a class has only one instance
ⓘ
a single globally accessible instance ⓘ |
| firstPopularizedBy |
Erich Gamma
ⓘ
John Vlissides ⓘ Ralph Johnson ⓘ Richard Helm ⓘ |
| hasVariant |
eager Singleton
ⓘ
enum-based Singleton in Java ⓘ lazy Singleton ⓘ thread-safe Singleton ⓘ |
| oftenImplements |
eager initialization
ⓘ
lazy initialization ⓘ |
| oftenUses |
double-checked locking for thread safety
ⓘ
synchronization mechanisms ⓘ |
| provides | global access point to an instance ⓘ |
| relatedTo |
Monostate pattern
ⓘ
linked to:
Singleton pattern
Service Locator pattern ⓘ |
| requires |
a static reference to the single instance
ⓘ
controlled instantiation logic ⓘ private constructor in many languages ⓘ |
| requiresCareful | thread-safety handling in multithreaded environments ⓘ |
| typicalImplementationLanguage |
C#
ⓘ
linked to:
C# programming language
C++ ⓘ Java ⓘ Objective-C ⓘ Python ⓘ |
| usedFor |
centralized control in software systems
ⓘ
coordinating actions across a system ⓘ managing access to a single resource ⓘ providing shared resources ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Singleton pattern Description of subject: The Singleton pattern is a creational design pattern that ensures a class has only one globally accessible instance, commonly used to provide shared resources or centralized control in software systems.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Singleton pattern