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

["Thomas Vandahl (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JCS-119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Vandahl updated JCS-119:
-------------------------------
    Fix Version/s:     (was: jcs-2.0-beta-2)
                   jcs-2.1

> 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-2.1
>
>
> 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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