Handlers

 The org.mortbay.jetty.Handler interface provides Jetty's core of content generation or manipulation. Classes that call this interface will have the implementation of modifying or handling requests. 

 Handlers are usually arranged in a list and a request presented to each handler in turn until (or at most) one indicates that the request has been handled. In this situation, this will allow handlers to: 

• Ignore requests that are not applicable
• Handle requests by populating the response and/or generating content
• Modify the request but allow it to pass onto the next handler(s).  Headers and attributes may be modified or an InputStream filter added
• Modify the response but allow the request to pass onto the next handler(s).  Headers may be modified or OutputStream filters added