Package com.tangosol.net.cache

Class CompactSerializationCache.WrapperEvictionPolicy

java.lang.Object

com.tangosol.net.cache.CompactSerializationCache.InternalEvictionPolicy

com.tangosol.net.cache.CompactSerializationCache.WrapperEvictionPolicy

All Implemented Interfaces:

ConfigurableCacheMap.EvictionPolicy

Enclosing class:

CompactSerializationCache

protected class CompactSerializationCache.WrapperEvictionPolicy
extends CompactSerializationCache.InternalEvictionPolicy

WrapperEvictionPolicy is used to wrap external or "custom" EvictionPolicy implementations to adapt the internal Binary key-based API to the Entry-based API.

Nested Class Summary

Nested classes/interfaces inherited from class com.tangosol.net.cache.CompactSerializationCache.InternalEvictionPolicy

CompactSerializationCache.InternalEvictionPolicy.EvictionCandidate, CompactSerializationCache.InternalEvictionPolicy.EvictionVisitor

Field Summary

Fields

Modifier and Type	Field	Description
protected final ConfigurableCacheMap.EvictionPolicy	f_policy	The underlying (custom) EvictionPolicy.

Fields inherited from class com.tangosol.net.cache.CompactSerializationCache.InternalEvictionPolicy

f_visitorTouchCount, f_visitorTouchTime, m_ldtLastEvict

Constructor Summary

Constructors

Constructor	Description
WrapperEvictionPolicy(ConfigurableCacheMap.EvictionPolicy policy)	Construct a WrapperEvictionPolicy.

Method Summary

Modifier and Type	Method	Description
protected long	calculateWeight(Binary binKey)	Calculate the "weight" of the entry associated with the specified key.
void	entryTouched(ConfigurableCacheMap.Entry entry)	This method is called by the cache to indicate that an entry has been touched.
void	entryTouched(Binary binKey)	This method is called by the cache to indicate that the entry for the specified key has been touched.
protected ConfigurableCacheMap.EvictionPolicy	getConfiguredPolicy()	Return the configured EvictionPolicy instance.
void	requestEviction(int cMaximum)	This method is called by the cache when the cache requires the eviction policy to evict entries.

Methods inherited from class com.tangosol.net.cache.CompactSerializationCache.InternalEvictionPolicy

getName, touchInternal

Methods inherited from class java.lang.Object

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

Field Details

f_policy

protected final ConfigurableCacheMap.EvictionPolicy f_policy

The underlying (custom) EvictionPolicy.

Constructor Details

WrapperEvictionPolicy

public WrapperEvictionPolicy(ConfigurableCacheMap.EvictionPolicy policy)

Construct a WrapperEvictionPolicy.

Parameters:

policy - the underlying EvictionPolicy

Method Details

entryTouched

public void entryTouched(Binary binKey)

This method is called by the cache to indicate that the entry for the specified key has been touched.

Overrides:

entryTouched in class CompactSerializationCache.InternalEvictionPolicy

Parameters:

binKey - the key

entryTouched

public void entryTouched(ConfigurableCacheMap.Entry entry)

This method is called by the cache to indicate that an entry has been touched.

Specified by:

entryTouched in interface ConfigurableCacheMap.EvictionPolicy

Overrides:

entryTouched in class CompactSerializationCache.InternalEvictionPolicy

Parameters:

entry - the Cache Entry that has been touched

calculateWeight

protected long calculateWeight(Binary binKey)

Calculate the "weight" of the entry associated with the specified key. The weight is a quantitative measure of how to prioritize the eviction of this entry w.r.t. the other cache entries. Entries with a smaller weights are of higher priority and are preferred over entries with larger weights for eviction.

Specified by:

calculateWeight in class CompactSerializationCache.InternalEvictionPolicy

Parameters:

binKey - the key to calculate the weight for

Returns:

the weight of the entry

requestEviction

public void requestEviction(int cMaximum)

This method is called by the cache when the cache requires the eviction policy to evict entries.

Specified by:

requestEviction in interface ConfigurableCacheMap.EvictionPolicy

Overrides:

requestEviction in class CompactSerializationCache.InternalEvictionPolicy

Parameters:

cMaximum - the maximum number of units that should remain in the cache when the eviction is complete

getConfiguredPolicy

protected ConfigurableCacheMap.EvictionPolicy getConfiguredPolicy()

Return the configured EvictionPolicy instance.

Specified by:

getConfiguredPolicy in class CompactSerializationCache.InternalEvictionPolicy

Returns:

the configured EvictionPolicy