@Override
    public long getCacheHits() {
        return cacheHits;
    }
Returns the number of cache hits. A cache hit occurs every
time the get method is called and the cache contains the requested
object.<p>

Keeping track of cache hits and misses lets one measure how efficient
the cache is; the higher the percentage of hits, the more efficient.

@return the number of cache hits.
xmppserver/src/main/java/org/jivesoftware/util/cache/DefaultCache.java