org.apache.ignite.cache.eviction.sorted

Class SortedEvictionPolicyFactory<K,V>

java.lang.Object

org.apache.ignite.cache.eviction.AbstractEvictionPolicyFactory<SortedEvictionPolicy<K,V>>

org.apache.ignite.cache.eviction.sorted.SortedEvictionPolicyFactory<K,V>

All Implemented Interfaces:

Serializable, javax.cache.configuration.Factory<SortedEvictionPolicy<K,V>>

public class SortedEvictionPolicyFactory<K,V>
extends AbstractEvictionPolicyFactory<SortedEvictionPolicy<K,V>>

Factory class for SortedEvictionPolicy. Creates cache Eviction policy which will select the minimum cache entry for eviction.

The eviction starts in the following cases:

• The cache size becomes batchSize elements greater than the maximum size.
• The size of cache entries in bytes becomes greater than the maximum memory size. The size of cache entry calculates as sum of key size and value size.

Note:Batch eviction is enabled only if maximum memory limit isn't set (maxMemSize == 0). batchSize elements will be evicted in this case. The default batchSize value is 1.

Entries comparison based on Comparator instance if provided. Default Comparator behaviour is use cache entries keys for comparison that imposes a requirement for keys to implement Comparable interface.

User defined comparator should implement Serializable interface.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SortedEvictionPolicyFactory()
SortedEvictionPolicyFactory(int maxSize)
SortedEvictionPolicyFactory(int maxSize, int batchSize, long maxMemSize)

Method Summary

Modifier and Type	Method and Description
SortedEvictionPolicy<K,V>	create()
Comparator<EvictableEntry<K,V>>	getComp() Gets entries comparator.
void	setComp(Comparator<EvictableEntry<K,V>> comp) Sets entries comparator.

Methods inherited from class org.apache.ignite.cache.eviction.AbstractEvictionPolicyFactory

getBatchSize, getMaxMemorySize, getMaxSize, setBatchSize, setMaxMemorySize, setMaxSize

Methods inherited from class java.lang.Object

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

Constructor Detail

SortedEvictionPolicyFactory

public SortedEvictionPolicyFactory()

SortedEvictionPolicyFactory

public SortedEvictionPolicyFactory(int maxSize)

SortedEvictionPolicyFactory

public SortedEvictionPolicyFactory(int maxSize,
                                   int batchSize,
                                   long maxMemSize)

Method Detail

getComp

public Comparator<EvictableEntry<K,V>> getComp()

Gets entries comparator.

Returns:

entry comparator.

setComp

public void setComp(Comparator<EvictableEntry<K,V>> comp)

Sets entries comparator.

Parameters:

comp - entry comparator.

create

public SortedEvictionPolicy<K,V> create()