Package org.eclipse.jetty.servlets

Class PushCacheFilter

java.lang.Object

org.eclipse.jetty.servlets.PushCacheFilter

All Implemented Interfaces:

javax.servlet.Filter

@Deprecated
@ManagedObject("Push cache based on the HTTP \'Referer\' header")
public class PushCacheFilter
extends java.lang.Object
implements javax.servlet.Filter

Deprecated.

no replacement for this deprecated http feature

A filter that builds a cache of secondary resources associated to primary resources.

A typical request for a primary resource such as index.html is immediately followed by a number of requests for secondary resources. Secondary resource requests will have a Referer HTTP header that points to index.html, which is used to associate the secondary resource to the primary resource.

Only secondary resources that are requested within a (small) time period from the request of the primary resource are associated with the primary resource.

This allows to build a cache of secondary resources associated with primary resources. When a request for a primary resource arrives, associated secondary resources are pushed to the client, unless the request carries If-xxx header that hint that the client has the resources in its cache.

If the init param useQueryInKey is set, then the query string is used as as part of the key to identify a resource

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	PushCacheFilter.PrimaryResource	Deprecated.

Field Summary

Fields

Modifier and Type	Field	Description
private long	_associatePeriod	Deprecated.
private java.util.concurrent.ConcurrentMap<java.lang.String,PushCacheFilter.PrimaryResource>	_cache	Deprecated.
private java.util.Set<java.lang.String>	_hosts	Deprecated.
private int	_maxAssociations	Deprecated.
private java.util.Set<java.lang.Integer>	_ports	Deprecated.
private long	_renew	Deprecated.
private boolean	_useQueryInKey	Deprecated.
private static Logger	LOG	Deprecated.

Constructor Summary

Constructors

Constructor	Description
PushCacheFilter()	Deprecated.

Method Summary

Modifier and Type	Method	Description
void	clearPushCache()	Deprecated.
void	destroy()	Deprecated.
void	doFilter(javax.servlet.ServletRequest req, javax.servlet.ServletResponse resp, javax.servlet.FilterChain chain)	Deprecated.
java.util.Map<java.lang.String,java.lang.String>	getPushCache()	Deprecated.
void	init(javax.servlet.FilterConfig config)	Deprecated.
void	renewPushCache()	Deprecated.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final Logger LOG

Deprecated.

_ports

private final java.util.Set<java.lang.Integer> _ports

Deprecated.

_hosts

private final java.util.Set<java.lang.String> _hosts

Deprecated.

_cache

private final java.util.concurrent.ConcurrentMap<java.lang.String,PushCacheFilter.PrimaryResource> _cache

Deprecated.

_associatePeriod

private long _associatePeriod

Deprecated.

_maxAssociations

private int _maxAssociations

Deprecated.

_renew

private long _renew

Deprecated.

_useQueryInKey

private boolean _useQueryInKey

Deprecated.

Constructor Detail

PushCacheFilter

public PushCacheFilter()

Deprecated.

Method Detail

init

public void init(javax.servlet.FilterConfig config)
          throws javax.servlet.ServletException

Deprecated.

Specified by:

init in interface javax.servlet.Filter

Throws:

javax.servlet.ServletException

doFilter

public void doFilter(javax.servlet.ServletRequest req,
                     javax.servlet.ServletResponse resp,
                     javax.servlet.FilterChain chain)
              throws java.io.IOException,
                     javax.servlet.ServletException

Deprecated.

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

java.io.IOException

javax.servlet.ServletException

destroy

public void destroy()

Deprecated.

Specified by:

destroy in interface javax.servlet.Filter

getPushCache

@ManagedAttribute("The push cache contents")
public java.util.Map<java.lang.String,java.lang.String> getPushCache()

Deprecated.

renewPushCache

@ManagedOperation(value="Renews the push cache contents",
                  impact="ACTION")
public void renewPushCache()

Deprecated.

clearPushCache

@ManagedOperation(value="Clears the push cache contents",
                  impact="ACTION")
public void clearPushCache()

Deprecated.