Method put

src/main/java/org/cboard/cache/HeapCacheManager.java:14–17

(String key, T data, long expire)

    private ConcurrentMap<String, CacheObject> cache = new ConcurrentHashMap<>();

    @Override
    public void put(String key, T data, long expire) {
        cache.put(key, new CacheObject(new Date().getTime(), expire, data));
    }

    @Override
    public T get(String key) {