all index.md files renamed to README.md for more compatibility with github

front-controller/README.md

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+---
+layout: pattern
+title: Front Controller
+folder: front-controller
+permalink: /patterns/front-controller/
+categories: Presentation Tier
+tags:
+ - Java
+ - Difficulty-Intermediate
+---
+
+## Intent
+Introduce a common handler for all requests for a web site. This
+way we can encapsulate common functionality such as security,
+internationalization, routing and logging in a single place.
+
+![alt text](./etc/front-controller.png "Front Controller")
+
+## Applicability
+Use the Front Controller pattern when
+
+* you want to encapsulate common request handling functionality in single place
+* you want to implements dynamic request handling i.e. change routing without modifying code
+* make web server configuration portable, you only need to register the handler web server specific way
+
+## Real world examples
+
+* [Apache Struts](https://struts.apache.org/)
+
+## Credits
+
+* [J2EE Design Patterns](http://www.amazon.com/J2EE-Design-Patterns-William-Crawford/dp/0596004273/ref=sr_1_2)
+* [Presentation Tier Patterns](http://www.javagyan.com/tutorials/corej2eepatterns/presentation-tier-patterns)
+* [Patterns of Enterprise Application Architecture](http://www.amazon.com/Patterns-Enterprise-Application-Architecture-Martin/dp/0321127420)