Package com.aoindustries.servlet.lastmodified

Class LastModifiedCacheControlFilter

java.lang.Object

com.aoindustries.servlet.lastmodified.LastModifiedCacheControlFilter

All Implemented Interfaces:

Filter

public class LastModifiedCacheControlFilter
extends Object
implements Filter

Adds a cache-control header to any request with a LastModifiedServlet.LAST_MODIFIED_PARAMETER_NAME parameter. The header is added before the filter chain is called.

This should be used for the DispatcherType.REQUEST dispatcher only.

 Init Parameters:
    cache-control: The content of the cache-control header, defaults to 
 

See also:

1. Cache-Control - HTTP | MDN
2. Keeping things fresh with stale-while-revalidate
3. Why we set a `Cache-Control: Max-Age` of 1 year
4. Uses inefficient cache policy on static assets

See Also:

for supported patterns

Field Summary

Fields

Modifier and Type	Field	Description
static String	DEFAULT_CACHE_CONTROL	The default, very aggressive, cache-control header value.

Constructor Summary

Constructors

Constructor	Description
LastModifiedCacheControlFilter()

Method Summary

Modifier and Type	Method	Description
void	destroy()
void	doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
void	init(FilterConfig config)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CACHE_CONTROL

public static final String DEFAULT_CACHE_CONTROL

The default, very aggressive, cache-control header value.

See Also:

Constant Field Values

Constructor Detail

LastModifiedCacheControlFilter

public LastModifiedCacheControlFilter()

Method Detail

init

public void init(FilterConfig config)

Specified by:

init in interface Filter

doFilter

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

Specified by:

doFilter in interface Filter

Throws:

IOException

ServletException

destroy

public void destroy()

Specified by:

destroy in interface Filter