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

Class AsynchronousValidationRequest

java.lang.Object

org.apache.http.impl.client.cache.AsynchronousValidationRequest

All Implemented Interfaces:

java.lang.Runnable

public class AsynchronousValidationRequest
extends java.lang.Object
implements java.lang.Runnable

Class used to represent an asynchronous revalidation event, such as with "stale-while-revalidate"

Field Summary

Fields

Modifier and Type	Field	Description
private HttpCacheEntry	cacheEntry
private CachingExec	cachingExec
private int	consecutiveFailedAttempts
private HttpClientContext	context
private HttpExecutionAware	execAware
private java.lang.String	identifier
private org.apache.commons.logging.Log	log
private AsynchronousValidator	parent
private HttpRequestWrapper	request
private HttpRoute	route

Constructor Summary

Constructors

Constructor	Description
AsynchronousValidationRequest(AsynchronousValidator parent, CachingExec cachingExec, HttpRoute route, HttpRequestWrapper request, HttpClientContext context, HttpExecutionAware execAware, HttpCacheEntry cacheEntry, java.lang.String identifier, int consecutiveFailedAttempts)	Used internally by AsynchronousValidator to schedule a revalidation.

Method Summary

Modifier and Type	Method	Description
int	getConsecutiveFailedAttempts()	The number of consecutively failed revalidation attempts.
java.lang.String	getIdentifier()
private boolean	isNotServerError(int statusCode)	Return whether the status code indicates a server error or not.
private boolean	isNotStale(org.apache.http.HttpResponse httpResponse)	Try to detect if the returned response is generated from a stale cache entry.
private boolean	revalidateCacheEntry()	Revalidate the cache entry and return if the operation was successful.
void	run()

Methods inherited from class java.lang.Object

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

Field Detail

parent

private final AsynchronousValidator parent

cachingExec

private final CachingExec cachingExec

route

private final HttpRoute route

request

private final HttpRequestWrapper request

context

private final HttpClientContext context

execAware

private final HttpExecutionAware execAware

cacheEntry

private final HttpCacheEntry cacheEntry

identifier

private final java.lang.String identifier

consecutiveFailedAttempts

private final int consecutiveFailedAttempts

log

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

Constructor Detail

AsynchronousValidationRequest

AsynchronousValidationRequest(AsynchronousValidator parent,
                              CachingExec cachingExec,
                              HttpRoute route,
                              HttpRequestWrapper request,
                              HttpClientContext context,
                              HttpExecutionAware execAware,
                              HttpCacheEntry cacheEntry,
                              java.lang.String identifier,
                              int consecutiveFailedAttempts)

Used internally by AsynchronousValidator to schedule a revalidation.

Parameters:

request -

context -

cacheEntry -

identifier -

consecutiveFailedAttempts -

Method Detail

run

public void run()

Specified by:

run in interface java.lang.Runnable

revalidateCacheEntry

private boolean revalidateCacheEntry()

Revalidate the cache entry and return if the operation was successful. Success means a connection to the server was established and replay did not indicate a server error.

Returns:

true if the cache entry was successfully validated; otherwise false

isNotServerError

private boolean isNotServerError(int statusCode)

Return whether the status code indicates a server error or not.

Parameters:

statusCode - the status code to be checked

Returns:

if the status code indicates a server error or not

isNotStale

private boolean isNotStale(org.apache.http.HttpResponse httpResponse)

Try to detect if the returned response is generated from a stale cache entry.

Parameters:

httpResponse - the response to be checked

Returns:

whether the response is stale or not

getIdentifier

public java.lang.String getIdentifier()

getConsecutiveFailedAttempts

public int getConsecutiveFailedAttempts()

The number of consecutively failed revalidation attempts.

Returns:

the number of consecutively failed revalidation attempts.