com.tangosol.net.cache

Class CompactSerializationCache.InternalEvictionPolicy.EvictionVisitor

java.lang.Object

com.tangosol.net.cache.CompactSerializationCache.InternalEvictionPolicy.EvictionVisitor

All Implemented Interfaces:

BinaryLongMap.EntryVisitor, MultiBinaryLongMap.SafeEntryVisitor

Enclosing class:

CompactSerializationCache.InternalEvictionPolicy

protected class CompactSerializationCache.InternalEvictionPolicy.EvictionVisitor
extends Object
implements MultiBinaryLongMap.SafeEntryVisitor

SafeEntryVisitor implementation that calculates the set of eviction candidates.

The EvictionVisitor is to be applied to Entries of a BinaryLongMap that associates cache keys to their size in units (as determined by the configured unit-calculator).

Field Summary

Fields

Modifier and Type	Field and Description
protected long	f_cUnitsToEvict The minimum number of units to evict.
protected SortedSet<CompactSerializationCache.InternalEvictionPolicy.EvictionCandidate>	f_setEvicting The Map containing the keys which are candidates for eviction, mapped to their size in units.
protected long	m_cUnitsEvicting The number of units occupied by the entries in the eviction set.
protected long	m_lKeepThreshold The weight of the lightest entry that we have decided to keep.

Constructor Summary

Constructors

Constructor and Description
EvictionVisitor(long cLowUnits) Construct an EvictionVisitor to identify the set of keys to evict from the cache in order to prune the cache down to the specified low-units threshold

Method Summary

Modifier and Type	Method and Description
void	visit(BinaryLongMap.Entry entry) Visit the specified entry.

Methods inherited from class java.lang.Object

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

Field Detail

f_setEvicting

protected final SortedSet<CompactSerializationCache.InternalEvictionPolicy.EvictionCandidate> f_setEvicting

The Map containing the keys which are candidates for eviction, mapped to their size in units.

f_cUnitsToEvict

protected final long f_cUnitsToEvict

The minimum number of units to evict.

m_cUnitsEvicting

protected long m_cUnitsEvicting

The number of units occupied by the entries in the eviction set. Used during the iteration (evict-set calculation) only.

m_lKeepThreshold

protected long m_lKeepThreshold

The weight of the lightest entry that we have decided to keep. All of the entries to evict will be lighter than this threshold.

Constructor Detail

EvictionVisitor

public EvictionVisitor(long cLowUnits)

Construct an EvictionVisitor to identify the set of keys to evict from the cache in order to prune the cache down to the specified low-units threshold

Parameters:

cLowUnits - the low-units threshold to prune the cache to

Method Detail

visit

public void visit(BinaryLongMap.Entry entry)

Visit the specified entry.

Specified by:

visit in interface BinaryLongMap.EntryVisitor

Parameters:

entry - the entry