[JCS-147] Provide file size limitation for Block Disk Cache and Indexed Disk Cache

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: jcs-2.0-beta-1
• Fix Version/s: jcs-2.0-beta-2
• Component/s: Indexed Disk Cache
• Labels: patch
• Assignee: Thomas Vandahl
• Reporter: Wiktor N
• Created: 04/Apr/15 20:35
• Updated: 25/Dec/16 18:35
• Resolved: 06/Apr/15 15:28

Description

Attached please find a patch, that provides additional mode of operation to Block and Index Disk Caches, i.e. that instead of limiting the key count, you limit the content size. It's a proxy for limiting the file size, but it works quite good.

The patch has additional length, as I moved:
src/main/java/org/apache/commons/jcs/utils/struct/LRUMap.java
to:
src/main/java/org/apache/commons/jcs/utils/struct/AbstractLRUMap.java

and then - created LRUMap, that implements size-based policy.

Also, in a separate file I provided update for website docs.

I did some testing, also performance, and it looks like, it doesn't introduce noticeable difference.