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public interface Policy
An eviction policy.
The Cache will use a policy at startup. There are three policy implementations provided in ehcache: LRU, LFU and FIFO. However many other policies are possible. That the policy has access to the whole element enables policies based on the key, value, metadata, statistics, or a combination of any of the above.
Method Summary | |
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boolean |
compare(Element element1,
Element element2)
Compares the desirableness for eviction of two elements |
String |
getName()
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Element |
selectedBasedOnPolicy(Element[] sampledElements,
Element justAdded)
Finds the best eviction candidate based on the sampled elements. |
Method Detail |
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String getName()
Element selectedBasedOnPolicy(Element[] sampledElements, Element justAdded)
sampledElements
- this should be a random subset of the populationjustAdded
- we probably never want to select the element just added.
It is provided so that it can be ignored if selected. May be null.
boolean compare(Element element1, Element element2)
element1
- the element to compare againstelement2
- the element to compare
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