org.mortbay.jetty.servlet
Class JSR154Filter

java.lang.Object
  org.mortbay.jetty.servlet.JSR154Filter

All Implemented Interfaces:

Filter

public class JSR154Filter

extends java.lang.Object

implements Filter

JSR 154 Stupidness filter. This filter contains the elements of the JSR154 servlet 2.4 specification that are too objectionable to include in the core of Jetty. Thus they have been added as a filter that can be removed from the defaultweb.xml file if none of the following "features" are required:

• RequestAttributeListeners. If you actually have a real use for these, please tell the jetty lists what they are and why you can't use a normal filter/wrapper for this?
• SRV.6.2.2 Dispatachers where the container cannot wrap the request or response. See http://jetty.mortbay.org/jetty/doc/servlet24.html#d0e711 to find out why this is stupid.

The boolean init parameter "unwrappedDispatched"

Constructor Summary

JSR154Filter()

Method Summary

void	destroy() Called by the web container to indicate to a filter that it is being taken out of service.
void	doFilter(ServletRequest request, ServletResponse response, FilterChain chain) The doFilter method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain.
org.mortbay.jetty.servlet.Dispatcher.DispatcherRequest	getDispatchRequest()
void	init(FilterConfig filterConfig) Called by the web container to indicate to a filter that it is being placed into service.
boolean	isUnwrappedDispatchSupported()
void	setDispatch(org.mortbay.jetty.servlet.Dispatcher.DispatcherRequest request, org.mortbay.jetty.servlet.Dispatcher.DispatcherResponse response)
void	setUnwrappedDispatchSupported(boolean supportUnwrappedDispatch)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JSR154Filter

public JSR154Filter()

Method Detail

init

public void init(FilterConfig filterConfig)
          throws ServletException

Description copied from interface: Filter

Called by the web container to indicate to a filter that it is being placed into service. The servlet container calls the init method exactly once after instantiating the filter. The init method must complete successfully before the filter is asked to do any filtering work.

The web container cannot place the filter into service if the init method either
1.Throws a ServletException
2.Does not return within a time period defined by the web container

Specified by:

init in interface Filter

Throws:

ServletException

isUnwrappedDispatchSupported

public boolean isUnwrappedDispatchSupported()

setUnwrappedDispatchSupported

public void setUnwrappedDispatchSupported(boolean supportUnwrappedDispatch)

Parameters:

supportUnwrappedDispatch - The supportUnwrappedDispatch to set.

setDispatch

public void setDispatch(org.mortbay.jetty.servlet.Dispatcher.DispatcherRequest request,
                        org.mortbay.jetty.servlet.Dispatcher.DispatcherResponse response)

getDispatchRequest

public org.mortbay.jetty.servlet.Dispatcher.DispatcherRequest getDispatchRequest()

doFilter

public void doFilter(ServletRequest request,
                     ServletResponse response,
                     FilterChain chain)
              throws java.io.IOException,
                     ServletException

Description copied from interface: Filter

The doFilter method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain. The FilterChain passed in to this method allows the Filter to pass on the request and response to the next entity in the chain.

A typical implementation of this method would follow the following pattern:-
1. Examine the request
2. Optionally wrap the request object with a custom implementation to filter content or headers for input filtering
3. Optionally wrap the response object with a custom implementation to filter content or headers for output filtering
4. a) Either invoke the next entity in the chain using the FilterChain object (chain.doFilter()),
4. b) or not pass on the request/response pair to the next entity in the filter chain to block the request processing
5. Directly set headers on the response after invocation of the next entity in ther filter chain.

Specified by:

doFilter in interface Filter

Throws:

java.io.IOException

ServletException

destroy

public void destroy()

Description copied from interface: Filter

Called by the web container to indicate to a filter that it is being taken out of service. This method is only called once all threads within the filter's doFilter method have exited or after a timeout period has passed. After the web container calls this method, it will not call the doFilter method again on this instance of the filter.

This method gives the filter an opportunity to clean up any resources that are being held (for example, memory, file handles, threads) and make sure that any persistent state is synchronized with the filter's current state in memory.

Specified by:

destroy in interface Filter