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

Class DefaultFailureCache

java.lang.Object

org.apache.http.impl.client.cache.DefaultFailureCache

All Implemented Interfaces:

FailureCache

@Contract(threading=SAFE)
public class DefaultFailureCache
extends java.lang.Object
implements FailureCache

Implements a bounded failure cache. The oldest entries are discarded when the maximum size is exceeded.

Since:

4.3

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static int	DEFAULT_MAX_SIZE
(package private) static int	MAX_UPDATE_TRIES
private int	maxSize
private java.util.concurrent.ConcurrentMap<java.lang.String,FailureCacheValue>	storage

Constructor Summary

Constructors

Constructor	Description
DefaultFailureCache()	Create a new failure cache with the maximum size of DEFAULT_MAX_SIZE.
DefaultFailureCache(int maxSize)	Creates a new failure cache with the specified maximum size.

Method Summary

Modifier and Type	Method	Description
private FailureCacheValue	findValueWithOldestTimestamp()
int	getErrorCount(java.lang.String identifier)	Get the current error count.
void	increaseErrorCount(java.lang.String identifier)	Increases the error count by one.
private void	removeOldestEntryIfMapSizeExceeded()
void	resetErrorCount(java.lang.String identifier)	Reset the error count back to zero.
private void	updateValue(java.lang.String identifier)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MAX_SIZE

static final int DEFAULT_MAX_SIZE

See Also:

Constant Field Values

MAX_UPDATE_TRIES

static final int MAX_UPDATE_TRIES

See Also:

Constant Field Values

maxSize

private final int maxSize

storage

private final java.util.concurrent.ConcurrentMap<java.lang.String,FailureCacheValue> storage

Constructor Detail

DefaultFailureCache

public DefaultFailureCache()

Create a new failure cache with the maximum size of DEFAULT_MAX_SIZE.

DefaultFailureCache

public DefaultFailureCache(int maxSize)

Creates a new failure cache with the specified maximum size.

Parameters:

maxSize - the maximum number of entries the cache should store

Method Detail

getErrorCount

public int getErrorCount(java.lang.String identifier)

Description copied from interface: FailureCache

Get the current error count.

Specified by:

getErrorCount in interface FailureCache

Parameters:

identifier - the identifier for which the error count is requested

Returns:

the currently known error count or zero if there is no record

resetErrorCount

public void resetErrorCount(java.lang.String identifier)

Description copied from interface: FailureCache

Reset the error count back to zero.

Specified by:

resetErrorCount in interface FailureCache

Parameters:

identifier - the identifier for which the error count should be reset

increaseErrorCount

public void increaseErrorCount(java.lang.String identifier)

Description copied from interface: FailureCache

Increases the error count by one.

Specified by:

increaseErrorCount in interface FailureCache

Parameters:

identifier - the identifier for which the error count should be increased

updateValue

private void updateValue(java.lang.String identifier)

removeOldestEntryIfMapSizeExceeded

private void removeOldestEntryIfMapSizeExceeded()

findValueWithOldestTimestamp

private FailureCacheValue findValueWithOldestTimestamp()