Performance - Replace synchronized blocks with ReentrantReadWriteLock
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Key: OGNL-20
URL: https://issues.apache.org/jira/browse/OGNL-20
Project: OGNL
Issue Type: Improvement
Environment: ALL
Reporter: Greg Lively
I've noticed a lot of synchronized blocks of code in OGNL. For the most part,
these synchronized blocks are controlling access to HashMaps, etc. I believe
this could be done far better using ReentrantReadWriteLocks.
ReentrantReadWriteLock allows unlimited concurrent access, and single threads
only for writes. Perfect in an environment where the ratio of reads is far
higher than writes; which is typically the scenario for caching. Plus the
access control can be tuned for reads and writes; not just a big synchronized{}
wrapping a bunch of code.
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