java Thread-safe LRUCache implementation
Advice 1

This implementation is not thread safe. For example, if two threads invoked getElement(key1) simultaneously, they may runs to concurrentLinkedQueue.add(key) at same times(they both performed delete and get, but delete will fail the second time or just do nothing), then two same keys will be added.

Advice 2

Maybe capacity is more suitable than maxSize.

Advice 3

LinkedHashMap is often used as LRU cache.