2016-02-01 18:45:54 +00:00
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---
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layout: pattern
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title: Feature Toggle
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folder: feature-toggle
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permalink: /patterns/feature-toggle/
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categories: Behavioral
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tags:
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- Java
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- Difficulty-Beginner
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---
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## Also known as
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Feature Flag
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## Intent
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Used to switch code execution paths based on properties or groupings. Allowing new features to be released, tested
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and rolled out. Allowing switching back to the older feature quickly if needed. It should be noted that this pattern,
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can easily introduce code complexity. There is also cause for concern that the old feature that the toggle is eventually
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going to phase out is never removed, causing redundant code smells and increased maintainability.
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## Applicability
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Use the Feature Toogle pattern when
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* Giving different features to different users.
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* Rolling out a new feature incrementally.
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* Switching between development and production environments.
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## Credits
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* [Martin Fowler 29 October 2010 (2010-10-29).](http://martinfowler.com/bliki/FeatureToggle.html)
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