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From "Lars Michele (JIRA)" <j...@apache.org>
Subject [jira] [Created] (JCR-3449) Improved performance for concurrent read-only access
Date Sun, 21 Oct 2012 20:02:11 GMT
Lars Michele created JCR-3449:
---------------------------------

             Summary: Improved performance for concurrent read-only access
                 Key: JCR-3449
                 URL: https://issues.apache.org/jira/browse/JCR-3449
             Project: Jackrabbit Content Repository
          Issue Type: Improvement
          Components: jackrabbit-core
    Affects Versions: 2.4.3, 2.2.13
            Reporter: Lars Michele
            Priority: Minor
         Attachments: jackrabbit-concurrent-read.patch

This patch relates to JCR-890. The current implementation allows to share a session across
multiple threads reading, but the locking mechanism used makes this use-case slow. The attached
patch uses a ReentrantReadWriteLock for accessing session internals, which allows concurrent
reads be executed concurrently. The only drawback is, that for the "autofix" feature to work
as before one has to instantiate a thread on such cases, because it cannot be executed in
the read-scope of a the session facing such problems.

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