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From "Martijn Hendriks (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1456) Database connection pooling
Date Wed, 02 Sep 2009 10:32:32 GMT

    [ https://issues.apache.org/jira/browse/JCR-1456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12750375#action_12750375
] 

Martijn Hendriks commented on JCR-1456:
---------------------------------------

I think that it is a good point to ask some feedback about the direction that the work on
the sandbox branch is taking.

What has been done:
* A getDataSource method has been added to the ConnectionFactory which creates and returns
a pooled datasource (commons-dbcp).
* Maven profiles and some infrastructure have been added which make running the automated
tests against different DB backends easier.
* A DB uitility packages has been added: o.a.j.c.util.db. Classes from o.a.j.c.persistence.bundle.util
have been moved there, and most importantly, it contains the ConnectionHelper class hierarchy.
This hierarchy uses a DataSource provided by the Connectionfactory and provides a means to
execute SQL and has specializations for several DB types. Most notably, the Oracle10R1ConnectionHelper
implements special blob handling. It also contains a CheckSchemaOperation class which encapsulates
the logic to check and create DB schemas (using a ConnectionHelper).
* The bundle PMs and the DB Filesystem classes have been refactored to use the ConnectionHelper
and CheckSchemaOperation classes. The PM and FS classes serve as factories for ConnectionHelper
and CheckSchemaOperation instances.

What must still be done:
* Refactor remaining db based packages to use the ConnectionHelper and CheckSchemaOperation.
(journal, datastore, and maybe the non-bundle pms).
* Improve the implementation of Connectionfactory.getDataSource (now it creates a new DataSource
for each invocation with default properties....)
* ....
* A lot of integration testing

So what do you think about the current direction?

> Database connection pooling
> ---------------------------
>
>                 Key: JCR-1456
>                 URL: https://issues.apache.org/jira/browse/JCR-1456
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Jukka Zitting
>         Attachments: 777490.patch, dbcp.patch, dbcp.patch, patch-1456-1.txt, patch-1456-2.txt,
patch-1456-3.txt
>
>
> Jackrabbit should use database connection pools instead of a single connection per persistence
manager, cluster journal, or database data store.

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