Markus 5ce932ceb7 Work on #213
- properly categorize all patterns
- remove pattern list from readme
- minor fixes to readme
- removed "introduction" because its not a pattern and an error i
committed some time ago
2015-08-20 21:40:07 +02:00

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Markdown

---
layout: pattern
title: Servant
folder: servant
permalink: /patterns/servant/
categories: Structural
tags: Java
---
**Intent:** Servant is used for providing some behavior to a group of classes.
Instead of defining that behavior in each class - or when we cannot factor out
this behavior in the common parent class - it is defined once in the Servant.
![alt text](./etc/servant-pattern.png "Servant")
**Applicability:** Use the Servant pattern when
* when we want some objects to perform a common action and don't want to define this action as a method in every class.