2015-08-13 23:54:40 +02:00
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---
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layout: pattern
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title: Servant
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folder: servant
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2015-08-15 18:03:05 +02:00
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permalink: /patterns/servant/
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2016-08-30 15:10:34 +02:00
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pumlid: DSkn4O0m20NGLNG0G-ys63cDbv0SV7HzRUnUy-QYkSOkONKwWU4haV6JZe8pjd2nt1MYIBatAZKU1XjTVFEoYvT3by60c3erzW_qdPiL9CY_KrXB8rfz0G00
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2015-08-20 21:40:07 +02:00
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categories: Structural
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2015-12-28 15:52:44 +02:00
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tags:
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- Java
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- Difficulty-Beginner
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2015-08-13 23:54:40 +02:00
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---
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2016-01-03 21:14:30 +01:00
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## Intent
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Servant is used for providing some behavior to a group of classes.
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2015-08-13 23:54:40 +02:00
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Instead of defining that behavior in each class - or when we cannot factor out
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this behavior in the common parent class - it is defined once in the Servant.
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2016-01-03 21:14:30 +01:00
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## Applicability
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Use the Servant pattern when
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2015-08-13 23:54:40 +02:00
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2015-08-15 18:03:05 +02:00
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* when we want some objects to perform a common action and don't want to define this action as a method in every class.
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2016-01-27 12:55:59 +05:30
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## Credits
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* [Let's Modify the Objects-First Approach into Design-Patterns-First](http://edu.pecinovsky.cz/papers/2006_ITiCSE_Design_Patterns_First.pdf)
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