Observer
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| Observer | |
| Contributors | Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides |
|---|---|
| Last modification | June 6, 2017 |
| Source | Gamma, Helm, Johnson & Vlissides (1995)[1], Observer Pattern (2016)[2] |
| Pattern formats | OPR Alexandrian |
| Usability | |
| Learning domain | |
| Stakeholders | |
Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.[1][2]
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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 Observer Pattern. (2016). Retrieved November 9, 2016 from http://wiki.c2.com/?ObserverPattern.