Singleton
| Singleton | |
| Contributors | Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides |
|---|---|
| Last modification | March 29, 2017 |
| Source | Gamma, Helm, Johnson & Vlissides (1995)[1], Singleton Pattern (2016)[2] |
| Pattern formats | OPR Alexandrian |
| Usability | |
| Learning domain | |
| Stakeholders | |
If a system only needs one instance of a class, and that instance needs to be accessible in many different parts of a system, you control both instantiation and access by making that class a singleton.[1][2]
Context
Problem
Forces
Solution
Consequences
Benefits
Liabilities
Evidence
Literature
Discussion
Data
Applied evaluation
Related patterns
Example
References
- ↑ 1.0 1.1 Gamma, E., Helm, R., Johnson, R. & Vlissides, J. (1995). Design Patterns: elements of reusable object-oriented software. Addison-Wesley: Boston, MA. ISBN 0-201-63361-2.
- ↑ 2.0 2.1 Singleton Pattern. (2016). Retrieved October 4, 2016 from http://c2.com/cgi/wiki?SingletonPattern.