CacheStats (infrautils 1.8.0-SNAPSHOT API)

```
public interface CacheStats
```
Statistics about a Cache.
The data returned by this interface may not be 100% accurate, due to concurrency optimizations in implementations.

Author:

Michael Vorburger.ch

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`long`	`estimatedCurrentEntries()`	Number of key/value pair entries currently in the cache.
`com.google.common.collect.ImmutableMap<String,Number>`	`extensions()`	Extensions provide implementation specific cache stats.
`long`	`hitCount()`	Number of "hits" in the cache.
`long`	`missCount()`	Number of "misses" in the cache.

- Method Detail
  - estimatedCurrentEntries
```
long estimatedCurrentEntries()
```
    Number of key/value pair entries currently in the cache.
  - missCount
```
long missCount()
```
    Number of "misses" in the cache. A "miss" causes the CacheFunction to have to be invoked on a Cache.get(Object).
  - hitCount
```
long hitCount()
```
    Number of "hits" in the cache. A "hit" is when a Cache can return from a Cache.get(Object) without having to use its CacheFunction.
  - extensions
```
com.google.common.collect.ImmutableMap<String,Number> extensions()
```
    Extensions provide implementation specific cache stats. This is good enough for e.g. a CLI to dump and display to end-users.