public class CacheFilter extends Object implements javax.servlet.Filter
Modifier and Type | Field and Description |
---|---|
static long |
MAX_EXPIRY
Maximum allowed expiry lifetime in seconds, set to one year according to the advice in RFC 2616.
|
static long |
MIN_EXPIRY
Minimum allowed expiry lifetime, zero, which corresponds to not caching at all.
|
Constructor and Description |
---|
CacheFilter() |
Modifier and Type | Method and Description |
---|---|
void |
destroy()
Make stored references available for garbage collection.
|
void |
doFilter(javax.servlet.ServletRequest req,
javax.servlet.ServletResponse res,
javax.servlet.FilterChain chain)
Set a maximum expiry Cache-Control header applicable to the client and to intermediate caching servers.
|
void |
init(javax.servlet.FilterConfig config)
Parse the Cache-Control configuration parameter as a long integer, and set the filter expiry value, modulo the
minimum and maximum expiry constraints.
|
public static final long MAX_EXPIRY
public static final long MIN_EXPIRY
public void doFilter(javax.servlet.ServletRequest req, javax.servlet.ServletResponse res, javax.servlet.FilterChain chain) throws IOException, javax.servlet.ServletException
doFilter
in interface javax.servlet.Filter
IOException
javax.servlet.ServletException
public void init(javax.servlet.FilterConfig config) throws javax.servlet.ServletException
init
in interface javax.servlet.Filter
javax.servlet.ServletException
MIN_EXPIRY
,
MAX_EXPIRY
public void destroy()
destroy
in interface javax.servlet.Filter
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