org.apache.http.client.cache
Class HttpCacheEntry

java.lang.Object
  org.apache.http.client.cache.HttpCacheEntry

All Implemented Interfaces:

Serializable

@Immutable
public class HttpCacheEntry
extends Object
implements Serializable

Structure used to store an HttpResponse in a cache. Some entries can optionally depend on system resources that may require explicit deallocation. In such a case getResource() should return a non null instance of Resource that must be deallocated by calling Resource.dispose() method when no longer used.

Since:

4.1

See Also:

Serialized Form

Constructor Summary

HttpCacheEntry(Date requestDate, Date responseDate, StatusLine statusLine, Header[] responseHeaders, Resource resource)
Create a new HttpCacheEntry.

HttpCacheEntry(Date requestDate, Date responseDate, StatusLine statusLine, Header[] responseHeaders, Resource resource, Map<String,String> variantMap)
Create a new HttpCacheEntry with variants.

Method Summary

Header[]	getAllHeaders() Returns all the headers that were on the origin response.
Header	getFirstHeader(String name) Returns the first header from the origin response with the given name.
Header[]	getHeaders(String name) Gets all the headers with the given name that were on the origin response.
ProtocolVersion	getProtocolVersion() Returns the ProtocolVersion from the origin HttpResponse.
String	getReasonPhrase() Gets the reason phrase from the origin HttpResponse, for example, "Not Modified".
Date	getRequestDate() Returns the time the associated origin request was initiated by the caching module.
Resource	getResource() Returns the Resource containing the origin response body.
Date	getResponseDate() Returns the time the origin response was received by the caching module.
int	getStatusCode() Returns the HTTP response code from the origin HttpResponse.
StatusLine	getStatusLine() Returns the StatusLine from the origin HttpResponse.
Map<String,String>	getVariantMap() Returns an index about where in the cache different variants for a given resource are stored.
boolean	hasVariants() Indicates whether the origin response indicated the associated resource had variants (i.e.
String	toString() Provides a string representation of this instance suitable for human consumption.

Methods inherited from class java.lang.Object

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

Constructor Detail

HttpCacheEntry

public HttpCacheEntry(Date requestDate,
                      Date responseDate,
                      StatusLine statusLine,
                      Header[] responseHeaders,
                      Resource resource,
                      Map<String,String> variantMap)

Create a new HttpCacheEntry with variants.

Parameters:

requestDate - Date/time when the request was made (Used for age calculations)

responseDate - Date/time that the response came back (Used for age calculations)

statusLine - HTTP status line from origin response

responseHeaders - Header[] from original HTTP Response

resource - representing origin response body

variantMap - describing cache entries that are variants of this parent entry; this maps a "variant key" (derived from the varying request headers) to a "cache key" (where in the cache storage the particular variant is located)

HttpCacheEntry

public HttpCacheEntry(Date requestDate,
                      Date responseDate,
                      StatusLine statusLine,
                      Header[] responseHeaders,
                      Resource resource)

Create a new HttpCacheEntry.

Parameters:

requestDate - Date/time when the request was made (Used for age calculations)

responseDate - Date/time that the response came back (Used for age calculations)

statusLine - HTTP status line from origin response

responseHeaders - Header[] from original HTTP Response

resource - representing origin response body

Method Detail

getStatusLine

public StatusLine getStatusLine()

Returns the StatusLine from the origin HttpResponse.

getProtocolVersion

public ProtocolVersion getProtocolVersion()

Returns the ProtocolVersion from the origin HttpResponse.

getReasonPhrase

public String getReasonPhrase()

Gets the reason phrase from the origin HttpResponse, for example, "Not Modified".

getStatusCode

public int getStatusCode()

Returns the HTTP response code from the origin HttpResponse.

getRequestDate

public Date getRequestDate()

Returns the time the associated origin request was initiated by the caching module.

Returns:

Date

getResponseDate

public Date getResponseDate()

Returns the time the origin response was received by the caching module.

Returns:

Date

getAllHeaders

public Header[] getAllHeaders()

Returns all the headers that were on the origin response.

getFirstHeader

public Header getFirstHeader(String name)

Returns the first header from the origin response with the given name.

getHeaders

public Header[] getHeaders(String name)

Gets all the headers with the given name that were on the origin response.

getResource

public Resource getResource()

Returns the Resource containing the origin response body.

hasVariants

public boolean hasVariants()

Indicates whether the origin response indicated the associated resource had variants (i.e. that the Vary header was set on the origin response).

Returns:

true if this cached response was a variant

getVariantMap

public Map<String,String> getVariantMap()

Returns an index about where in the cache different variants for a given resource are stored. This maps "variant keys" to "cache keys", where the variant key is derived from the varying request headers, and the cache key is the location in the HttpCacheStorage where that particular variant is stored. The first variant returned is used as the "parent" entry to hold this index of the other variants.

toString

public String toString()

Provides a string representation of this instance suitable for human consumption.

Overrides:

toString in class Object