[jira] [Commented] (JCS-119) replace synchronized blocks by java locks or concurrenhashmap

["Yogesh Rao (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JCS-119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14117889#comment-14117889 ] 

Yogesh Rao commented on JCS-119:
--------------------------------

Hi, 

would patches specific to the functionality be allowed here ? 

Also would the JDK minimum version JCS 2.0 would support be 1.6 ?

Regards,
-Yogesh

> replace synchronized blocks by java locks or concurrenhashmap
> -------------------------------------------------------------
>
>                 Key: JCS-119
>                 URL: https://issues.apache.org/jira/browse/JCS-119
>             Project: Commons JCS
>          Issue Type: Improvement
>            Reporter: Romain Manni-Bucau
>             Fix For: jcs-2.0
>
>
> A cache is typically used in a concurrent environment. Since Java 6 using a ReentrantLock is faster than synchronized so can be interesting to replace synchronized blocks by a lock.
> Places i'm thinking about:
> * CompositeCache
> * AbstractDoubleLinkedListMemoryCache
> * LHMLRUMemoryCache
> * DoubleLinkedList
> * LRUMap
> * SingleLinkedList
> * SortedPreferentialArray
> Some places where replacing a HashMap by a ConcurrentHashMap can allow to get rid of synchronized without needing a lock:
> * CacheEventQueue
> * AbstractDiskCache
> * CacheWatchRepairable
> There are other places but this is the main I saw.



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