org.jasig.resourceserver.utils.filter
Class CacheExpirationFilter

java.lang.Object
  org.springframework.web.filter.GenericFilterBean
      org.jasig.resourceserver.utils.filter.CacheExpirationFilter

All Implemented Interfaces:

javax.servlet.Filter, org.springframework.beans.factory.BeanNameAware, org.springframework.beans.factory.DisposableBean, org.springframework.beans.factory.InitializingBean, org.springframework.web.context.ServletContextAware

public class CacheExpirationFilter
extends org.springframework.web.filter.GenericFilterBean

CacheExpirationFilter sets a far-future expiration timeout on the HTTP response of the filtered resource. This filter is intended for resources which will not be changed, such as versioned javascript and css files. Any resources protected by this filter should be renamed upon update. init-params:
cacheMaxAge - Sets the max age in seconds to be used in the cache headers for cached resources, defaults to 1 year (31536000).
regenerateHeadersInterval - The interval in milliseconds to regenerate the cache headers, defaults to 1 second (1000).

Author:

Jen Bourey

Field Summary

protected org.slf4j.Logger

logger

Constructor Summary

CacheExpirationFilter()

Method Summary

void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)
int	getCacheMaxAge()
protected void	initFilterBean()
void	setCacheMaxAge(int cacheMaxAge)

Methods inherited from class org.springframework.web.filter.GenericFilterBean

addRequiredProperty, afterPropertiesSet, destroy, getFilterConfig, getFilterName, getServletContext, init, initBeanWrapper, setBeanName, setServletContext

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected final org.slf4j.Logger logger

Constructor Detail

CacheExpirationFilter

public CacheExpirationFilter()

Method Detail

getCacheMaxAge

public int getCacheMaxAge()

setCacheMaxAge

public void setCacheMaxAge(int cacheMaxAge)

Parameters:

cacheMaxAge - Sets the max age in seconds to be used in the cache headers for cached resources, defaults to 1 year (31536000)

initFilterBean

protected void initFilterBean()
                       throws javax.servlet.ServletException

Overrides:

initFilterBean in class org.springframework.web.filter.GenericFilterBean

Throws:

javax.servlet.ServletException

doFilter

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

Throws:

IOException

javax.servlet.ServletException