2015-08-13 23:54:40 +02:00
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---
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layout: pattern
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title: Front Controller
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folder: front-controller
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2015-08-15 18:03:05 +02:00
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permalink: /patterns/front-controller/
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2019-12-13 21:09:28 +02:00
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categories: Structural
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2021-05-19 10:49:05 -06:00
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language: en
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2015-12-28 15:52:44 +02:00
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tags:
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2019-12-13 21:09:28 +02:00
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- Decoupling
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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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Introduce a common handler for all requests for a web site. This
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2015-08-13 23:54:40 +02:00
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way we can encapsulate common functionality such as security,
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internationalization, routing and logging in a single place.
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2019-12-07 20:01:13 +02:00
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## Class diagram
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2015-08-13 23:54:40 +02:00
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2016-01-03 21:14:30 +01:00
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## Applicability
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Use the Front Controller pattern when
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2015-08-13 23:54:40 +02:00
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* you want to encapsulate common request handling functionality in single place
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* you want to implements dynamic request handling i.e. change routing without modifying code
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* make web server configuration portable, you only need to register the handler web server specific way
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2016-01-03 21:14:30 +01:00
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## Real world examples
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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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* [Apache Struts](https://struts.apache.org/)
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2015-09-24 12:23:02 +05:30
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2016-01-03 21:14:30 +01:00
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## Credits
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2015-09-24 12:23:02 +05:30
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2020-07-06 13:31:07 +03:00
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* [J2EE Design Patterns](https://www.amazon.com/gp/product/0596004273/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0596004273&linkCode=as2&tag=javadesignpat-20&linkId=48d37c67fb3d845b802fa9b619ad8f31)
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2015-09-24 12:23:02 +05:30
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* [Presentation Tier Patterns](http://www.javagyan.com/tutorials/corej2eepatterns/presentation-tier-patterns)
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2020-07-06 13:31:07 +03:00
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* [Patterns of Enterprise Application Architecture](https://www.amazon.com/gp/product/0321127420/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0321127420&linkCode=as2&tag=javadesignpat-20&linkId=d9f7d37b032ca6e96253562d075fcc4a)
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2020-07-07 20:05:35 +03:00
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* [J2EE Design Patterns](https://www.amazon.com/gp/product/0596004273/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0596004273&linkCode=as2&tag=javadesignpat-20&linkId=f27d2644fbe5026ea448791a8ad09c94)
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