Question

Is there some collection implementation supporting expiration of the elements.

For example:

Collection<User> cachedUsers = new ExpirableList<User>(10000);

where

public ExpirableList(final long timeout){...}

And after given time (10000ms in this particular example), added elements will be removed from the collection. By using this, we will prevent overflow of our cachedUsers collection.

Answer 1

Yes, Guava supports a cache with timed expiration. See Guava Explained’s page on caches.

An alternative is an LRU (least-recently used) cache that disposes of the oldest accessed element when a new element is inserted.