Package org.apache.http.impl.client.cache

Class BasicHttpCache

java.lang.Object

org.apache.http.impl.client.cache.BasicHttpCache

All Implemented Interfaces:

HttpCache

class BasicHttpCache
extends java.lang.Object
implements HttpCache

Field Summary

Fields

Modifier and Type	Field	Description
private CacheEntryUpdater	cacheEntryUpdater
private HttpCacheInvalidator	cacheInvalidator
private org.apache.commons.logging.Log	log
private long	maxObjectSizeBytes
private ResourceFactory	resourceFactory
private CachedHttpResponseGenerator	responseGenerator
private static java.util.Set<java.lang.String>	safeRequestMethods
private HttpCacheStorage	storage
private CacheKeyGenerator	uriExtractor

Constructor Summary

Constructors

Constructor	Description
BasicHttpCache()
BasicHttpCache(ResourceFactory resourceFactory, HttpCacheStorage storage, CacheConfig config)
BasicHttpCache(ResourceFactory resourceFactory, HttpCacheStorage storage, CacheConfig config, CacheKeyGenerator uriExtractor)
BasicHttpCache(ResourceFactory resourceFactory, HttpCacheStorage storage, CacheConfig config, CacheKeyGenerator uriExtractor, HttpCacheInvalidator cacheInvalidator)
BasicHttpCache(CacheConfig config)

Method Summary

Modifier and Type	Method	Description
private void	addVariantWithEtag(java.lang.String variantKey, java.lang.String variantCacheKey, java.util.Map<java.lang.String,Variant> variants)
CloseableHttpResponse	cacheAndReturnResponse(org.apache.http.HttpHost host, org.apache.http.HttpRequest request, CloseableHttpResponse originResponse, java.util.Date requestSent, java.util.Date responseReceived)	Store a HttpResponse in the cache if possible, and return
org.apache.http.HttpResponse	cacheAndReturnResponse(org.apache.http.HttpHost host, org.apache.http.HttpRequest request, org.apache.http.HttpResponse originResponse, java.util.Date requestSent, java.util.Date responseReceived)	Store a HttpResponse in the cache if possible, and return
(package private) HttpCacheEntry	doGetUpdatedParentEntry(java.lang.String requestId, HttpCacheEntry existing, HttpCacheEntry entry, java.lang.String variantKey, java.lang.String variantCacheKey)
void	flushCacheEntriesFor(org.apache.http.HttpHost host, org.apache.http.HttpRequest request)	Clear all matching HttpCacheEntrys.
void	flushInvalidatedCacheEntriesFor(org.apache.http.HttpHost host, org.apache.http.HttpRequest request)	Clear invalidated matching HttpCacheEntrys
void	flushInvalidatedCacheEntriesFor(org.apache.http.HttpHost host, org.apache.http.HttpRequest request, org.apache.http.HttpResponse response)	Clear any entries that may be invalidated by the given response to a particular request.
(package private) CloseableHttpResponse	generateIncompleteResponseError(org.apache.http.HttpResponse response, Resource resource)
HttpCacheEntry	getCacheEntry(org.apache.http.HttpHost host, org.apache.http.HttpRequest request)	Retrieve matching HttpCacheEntry from the cache if it exists
(package private) SizeLimitedResponseReader	getResponseReader(org.apache.http.HttpRequest request, CloseableHttpResponse backEndResponse)
java.util.Map<java.lang.String,Variant>	getVariantCacheEntriesWithEtags(org.apache.http.HttpHost host, org.apache.http.HttpRequest request)	Retrieve all variants from the cache, if there are no variants then an empty Map is returned
(package private) boolean	isIncompleteResponse(org.apache.http.HttpResponse resp, Resource resource)
void	reuseVariantEntryFor(org.apache.http.HttpHost target, org.apache.http.HttpRequest req, Variant variant)	Specifies cache should reuse the given cached variant to satisfy requests whose varying headers match those of the given client request.
(package private) void	storeInCache(org.apache.http.HttpHost target, org.apache.http.HttpRequest request, HttpCacheEntry entry)
(package private) void	storeNonVariantEntry(org.apache.http.HttpHost target, org.apache.http.HttpRequest req, HttpCacheEntry entry)
(package private) void	storeVariantEntry(org.apache.http.HttpHost target, org.apache.http.HttpRequest req, HttpCacheEntry entry)
HttpCacheEntry	updateCacheEntry(org.apache.http.HttpHost target, org.apache.http.HttpRequest request, HttpCacheEntry stale, org.apache.http.HttpResponse originResponse, java.util.Date requestSent, java.util.Date responseReceived)	Update a HttpCacheEntry using a 304 HttpResponse.
HttpCacheEntry	updateVariantCacheEntry(org.apache.http.HttpHost target, org.apache.http.HttpRequest request, HttpCacheEntry stale, org.apache.http.HttpResponse originResponse, java.util.Date requestSent, java.util.Date responseReceived, java.lang.String cacheKey)	Update a specific HttpCacheEntry representing a cached variant using a 304 HttpResponse.

Methods inherited from class java.lang.Object

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

Field Detail

safeRequestMethods

private static final java.util.Set<java.lang.String> safeRequestMethods

uriExtractor

private final CacheKeyGenerator uriExtractor

resourceFactory

private final ResourceFactory resourceFactory

maxObjectSizeBytes

private final long maxObjectSizeBytes

cacheEntryUpdater

private final CacheEntryUpdater cacheEntryUpdater

responseGenerator

private final CachedHttpResponseGenerator responseGenerator

cacheInvalidator

private final HttpCacheInvalidator cacheInvalidator

storage

private final HttpCacheStorage storage

log

private final org.apache.commons.logging.Log log

Constructor Detail

BasicHttpCache

public BasicHttpCache(ResourceFactory resourceFactory,
                      HttpCacheStorage storage,
                      CacheConfig config,
                      CacheKeyGenerator uriExtractor,
                      HttpCacheInvalidator cacheInvalidator)

BasicHttpCache

public BasicHttpCache(ResourceFactory resourceFactory,
                      HttpCacheStorage storage,
                      CacheConfig config,
                      CacheKeyGenerator uriExtractor)

BasicHttpCache

public BasicHttpCache(ResourceFactory resourceFactory,
                      HttpCacheStorage storage,
                      CacheConfig config)

BasicHttpCache

public BasicHttpCache(CacheConfig config)

BasicHttpCache

public BasicHttpCache()

Method Detail

flushCacheEntriesFor

public void flushCacheEntriesFor(org.apache.http.HttpHost host,
                                 org.apache.http.HttpRequest request)
                          throws java.io.IOException

Description copied from interface: HttpCache

Clear all matching HttpCacheEntrys.

Specified by:

flushCacheEntriesFor in interface HttpCache

Throws:

java.io.IOException

flushInvalidatedCacheEntriesFor

public void flushInvalidatedCacheEntriesFor(org.apache.http.HttpHost host,
                                            org.apache.http.HttpRequest request,
                                            org.apache.http.HttpResponse response)

Description copied from interface: HttpCache

Clear any entries that may be invalidated by the given response to a particular request.

Specified by:

flushInvalidatedCacheEntriesFor in interface HttpCache

storeInCache

void storeInCache(org.apache.http.HttpHost target,
                  org.apache.http.HttpRequest request,
                  HttpCacheEntry entry)
           throws java.io.IOException

Throws:

java.io.IOException

storeNonVariantEntry

void storeNonVariantEntry(org.apache.http.HttpHost target,
                          org.apache.http.HttpRequest req,
                          HttpCacheEntry entry)
                   throws java.io.IOException

Throws:

java.io.IOException

storeVariantEntry

void storeVariantEntry(org.apache.http.HttpHost target,
                       org.apache.http.HttpRequest req,
                       HttpCacheEntry entry)
                throws java.io.IOException

Throws:

java.io.IOException

reuseVariantEntryFor

public void reuseVariantEntryFor(org.apache.http.HttpHost target,
                                 org.apache.http.HttpRequest req,
                                 Variant variant)
                          throws java.io.IOException

Description copied from interface: HttpCache

Specifies cache should reuse the given cached variant to satisfy requests whose varying headers match those of the given client request.

Specified by:

reuseVariantEntryFor in interface HttpCache

Parameters:

target - host of the upstream client request

req - request sent by upstream client

variant - variant cache entry to reuse

Throws:

java.io.IOException - may be thrown during cache update

isIncompleteResponse

boolean isIncompleteResponse(org.apache.http.HttpResponse resp,
                             Resource resource)

generateIncompleteResponseError

CloseableHttpResponse generateIncompleteResponseError(org.apache.http.HttpResponse response,
                                                      Resource resource)

doGetUpdatedParentEntry

HttpCacheEntry doGetUpdatedParentEntry(java.lang.String requestId,
                                       HttpCacheEntry existing,
                                       HttpCacheEntry entry,
                                       java.lang.String variantKey,
                                       java.lang.String variantCacheKey)
                                throws java.io.IOException

Throws:

java.io.IOException

updateCacheEntry

public HttpCacheEntry updateCacheEntry(org.apache.http.HttpHost target,
                                       org.apache.http.HttpRequest request,
                                       HttpCacheEntry stale,
                                       org.apache.http.HttpResponse originResponse,
                                       java.util.Date requestSent,
                                       java.util.Date responseReceived)
                                throws java.io.IOException

Description copied from interface: HttpCache

Update a HttpCacheEntry using a 304 HttpResponse.

Specified by:

updateCacheEntry in interface HttpCache

Returns:

the updated HttpCacheEntry

Throws:

java.io.IOException

updateVariantCacheEntry

public HttpCacheEntry updateVariantCacheEntry(org.apache.http.HttpHost target,
                                              org.apache.http.HttpRequest request,
                                              HttpCacheEntry stale,
                                              org.apache.http.HttpResponse originResponse,
                                              java.util.Date requestSent,
                                              java.util.Date responseReceived,
                                              java.lang.String cacheKey)
                                       throws java.io.IOException

Description copied from interface: HttpCache

Update a specific HttpCacheEntry representing a cached variant using a 304 HttpResponse.

Specified by:

updateVariantCacheEntry in interface HttpCache

Parameters:

target - host for client request

request - actual request from upstream client

stale - current variant cache entry

originResponse - 304 response received from origin

requestSent - when the validating request was sent

responseReceived - when the validating response was received

cacheKey - where in the cache this entry is currently stored

Returns:

the updated HttpCacheEntry

Throws:

java.io.IOException

cacheAndReturnResponse

public org.apache.http.HttpResponse cacheAndReturnResponse(org.apache.http.HttpHost host,
                                                           org.apache.http.HttpRequest request,
                                                           org.apache.http.HttpResponse originResponse,
                                                           java.util.Date requestSent,
                                                           java.util.Date responseReceived)
                                                    throws java.io.IOException

Description copied from interface: HttpCache

Store a HttpResponse in the cache if possible, and return

Specified by:

cacheAndReturnResponse in interface HttpCache

Returns:

the HttpResponse

Throws:

java.io.IOException

cacheAndReturnResponse

public CloseableHttpResponse cacheAndReturnResponse(org.apache.http.HttpHost host,
                                                    org.apache.http.HttpRequest request,
                                                    CloseableHttpResponse originResponse,
                                                    java.util.Date requestSent,
                                                    java.util.Date responseReceived)
                                             throws java.io.IOException

Description copied from interface: HttpCache

Store a HttpResponse in the cache if possible, and return

Specified by:

cacheAndReturnResponse in interface HttpCache

Returns:

the HttpResponse

Throws:

java.io.IOException

getResponseReader

SizeLimitedResponseReader getResponseReader(org.apache.http.HttpRequest request,
                                            CloseableHttpResponse backEndResponse)

getCacheEntry

public HttpCacheEntry getCacheEntry(org.apache.http.HttpHost host,
                                    org.apache.http.HttpRequest request)
                             throws java.io.IOException

Description copied from interface: HttpCache

Retrieve matching HttpCacheEntry from the cache if it exists

Specified by:

getCacheEntry in interface HttpCache

Returns:

the matching HttpCacheEntry or null

Throws:

java.io.IOException

flushInvalidatedCacheEntriesFor

public void flushInvalidatedCacheEntriesFor(org.apache.http.HttpHost host,
                                            org.apache.http.HttpRequest request)
                                     throws java.io.IOException

Description copied from interface: HttpCache

Clear invalidated matching HttpCacheEntrys

Specified by:

flushInvalidatedCacheEntriesFor in interface HttpCache

Throws:

java.io.IOException

getVariantCacheEntriesWithEtags

public java.util.Map<java.lang.String,Variant> getVariantCacheEntriesWithEtags(org.apache.http.HttpHost host,
                                                                                     org.apache.http.HttpRequest request)
                                                                              throws java.io.IOException

Description copied from interface: HttpCache

Retrieve all variants from the cache, if there are no variants then an empty Map is returned

Specified by:

getVariantCacheEntriesWithEtags in interface HttpCache

Returns:

a Map mapping Etags to variant cache entries

Throws:

java.io.IOException

addVariantWithEtag

private void addVariantWithEtag(java.lang.String variantKey,
                                java.lang.String variantCacheKey,
                                java.util.Map<java.lang.String,Variant> variants)
                         throws java.io.IOException

Throws:

java.io.IOException