org.apache.isis.core.webapp.content

Class ResourceCachingFilter

java.lang.Object

org.apache.isis.core.webapp.content.ResourceCachingFilter

All Implemented Interfaces:

javax.servlet.Filter

public class ResourceCachingFilter
extends Object
implements javax.servlet.Filter

Adapted from ://www.digitalsanctuary.com/tech-blog/java/jboss/setting -cache-headers-from-jboss.html

Usage:

 <filter>
   <filter-name>ResourceCachingFilter</filter-name>
   <filter-class>org.apache.isis.core.webapp.content.ResourceCachingFilter</filter-class>
   <init-param>
     <param-name>CacheTime</param-name>
     <param-value>86400</param-value>
   </init-param>
 </filter>
 ...
 <filter-mapping>
   <filter-name>ResourceCachingFilter</filter-name>
   <url-pattern>*.js</url-pattern>
 </filter-mapping>
 <filter-mapping>
   <filter-name>ResourceCachingFilter</filter-name>
   <url-pattern>*.css</url-pattern>
 </filter-mapping>
 <filter-mapping>
   <filter-name>ResourceCachingFilter</filter-name>
   <url-pattern>*.jpg</url-pattern>
 </filter-mapping>
 <filter-mapping>
   <filter-name>ResourceCachingFilter</filter-name>
   <url-pattern>*.png</url-pattern>
 </filter-mapping>
 <filter-mapping>
   <filter-name>ResourceCachingFilter</filter-name>
   <url-pattern>*.gif</url-pattern>
 </filter-mapping>
 

Constructor Summary

Constructors

Constructor and Description
ResourceCachingFilter()

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy() Destroy all humans!
void	doFilter(javax.servlet.ServletRequest servletRequest, javax.servlet.ServletResponse servletResponse, javax.servlet.FilterChain chain) Do filter.
void	init(javax.servlet.FilterConfig pConfig) Initializes the Servlet filter with the cache time and sets up the unchanging headers.
static boolean	isCachedResource(javax.servlet.http.HttpServletRequest request) To allow other filters to ask whether a request is mapped to the resource caching filter.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceCachingFilter

public ResourceCachingFilter()

Method Detail

isCachedResource

public static boolean isCachedResource(javax.servlet.http.HttpServletRequest request)

To allow other filters to ask whether a request is mapped to the resource caching filter.

For example, the IsisSessionFilter uses this in order to skip any session handling.

init

public void init(javax.servlet.FilterConfig pConfig)

Initializes the Servlet filter with the cache time and sets up the unchanging headers.

Specified by:

init in interface javax.servlet.Filter

Parameters:

pConfig - the config

See Also:

Filter.init(javax.servlet.FilterConfig)

doFilter

public void doFilter(javax.servlet.ServletRequest servletRequest,
            javax.servlet.ServletResponse servletResponse,
            javax.servlet.FilterChain chain)
              throws IOException,
                     javax.servlet.ServletException

Do filter.

Specified by:

doFilter in interface javax.servlet.Filter

Parameters:

servletRequest - the request

servletResponse - the response

chain - the chain

Throws:

IOException - Signals that an I/O exception has occurred.

javax.servlet.ServletException - the servlet exception

See Also:

Filter.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)

destroy

public void destroy()

Destroy all humans!

Specified by:

destroy in interface javax.servlet.Filter

See Also:

Filter.destroy()