26 lines
752 B
Markdown
26 lines
752 B
Markdown
---
|
|
layout: pattern
|
|
title: Servant
|
|
folder: servant
|
|
permalink: /patterns/servant/
|
|
categories: Structural
|
|
tags:
|
|
- Java
|
|
- Difficulty-Beginner
|
|
---
|
|
|
|
## 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.
|
|
|
|
|
|
|
|
## 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.
|
|
|
|
## Credits
|
|
* [Let's Modify the Objects-First Approach into Design-Patterns-First](http://edu.pecinovsky.cz/papers/2006_ITiCSE_Design_Patterns_First.pdf)
|