[jira] Commented: (JCR-1050) Remove synchronization from JNDI data sources

["Padraic Hannon (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JCR-1050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12539212 ] 

Padraic Hannon commented on JCR-1050:
-------------------------------------

Based on benchmarks using the DerbyPooledManager (the oracle ones where terrible! I have no idea what I was thinking) I am going to close this issue as I do not think that the problem of synchronization can be handled at this level. Using the ConcurrentReadWrite test I had almost the same number of operations with both the synchronized derbymanager and this pooled one.

> Remove synchronization from JNDI data sources
> ---------------------------------------------
>
>                 Key: JCR-1050
>                 URL: https://issues.apache.org/jira/browse/JCR-1050
>             Project: Jackrabbit
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Padraic Hannon
>         Attachments: DerbyPooledPersistenceManager.java, JCR-1050.patch
>
>
> Using datasources one should be able to rely on the application server to manage PreparedStatement caches therefore pre-creating and holding onto the connection for long periods of time should not be needed. This relates to improvement JCR-313, however, that change did not address the benefits one could see in using an application server controlled datasource. Even if jackrabbit does aim to use an embedded database such a system could be configured to use datasources and could benefit from the removal of the synchronization. 

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