java-design-patterns/front-controller/index.md

layout, title, folder, permalink, categories, tags

layout	title	folder	permalink	categories	tags
pattern	Front Controller	front-controller	/patterns/front-controller/	presentation_tier	pattern_tag

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.

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