LinkedHashMap is currently not supported. I added LinkedHashMap to Jira issue http://jira.jboss.com/jira/browse/JBCACHE-166. You can vote for this Jira issue if you think its important.
We currently support the following implementations:
HashMap - This is the only only offering hashed key lookup but is not ordered.
HashSet - The items are not ordered.
ArrayList - The items are ordered but no hashed key lookup.
The above are the current constraints as the other concrete collections classes aren't supported yet.
I suppose that you could put your key value pairs in a HashMap for fast lookup. You could also put the values in an arraylist for ordered iteration (you could put the key in also if needed.) Or perhaps you only want to put the key values in the arraylist.
thank you for the fast response,
the solution with additiolnal arraylist is enough for me now
90% operations concern fast lookup and the rest - listing all elements in right order
have a nice day