ehcache object key的实现原理

 public final Element get(Object key) throws IllegalStateException, CacheException {
        checkStatus();


        if (disabled) {
            return null;
        }


        if (isStatisticsEnabled()) {
            long start = System.currentTimeMillis();
            Element element = searchInStoreWithStats(key);
            //todo is this expensive. Maybe ditch.
            long end = System.currentTimeMillis();
            liveCacheStatisticsData.addGetTimeMillis(end - start);
            return element;
        } else {
            return searchInStoreWithoutStats(key, false, true);
        }
    }

    public Element(final Serializable key, final Serializable value, final long version) {
        this((Object) key, (Object) value, version);

    }

    public boolean containsKey(Object key) {
        int hash = hash(key.hashCode());
        return segmentFor(hash).containsKey(key, hash);
    }