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https://issues.apache.org/jira/browse/TOMEE-171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13264426#comment-13264426
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Romain Manni-Bucau commented on TOMEE-171:
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I agree but let me give you some more info (and a bit my opinion):
1) datasource connection info shouldnt be in the app so external config is fine
(for me the spec is not relevant on this, thats just my opinion)
2) it is easy to wrap but that's not done and we don't want to add as many
datasource type as driver
3) what you suggest will more or less be the fix i'll do
> TomEE automatically directs embedded (@DataSourceDefinition) h2 datasource to
> hsqldb
> ------------------------------------------------------------------------------------
>
> Key: TOMEE-171
> URL: https://issues.apache.org/jira/browse/TOMEE-171
> Project: TomEE
> Issue Type: Bug
> Affects Versions: 1.0.0-beta-2
> Environment: Mac OS X 10.6.8, JDK6u31, h2 1.3.161
> Reporter: Henk de Boer
> Attachments: crudh2_eclipseproject.zip
>
>
> When trying to run an example CRUD application for Java EE 6 (see
> http://henk53.wordpress.com/2012/04/15/jsf2-primefaces3-ejb3-jpa2-integration-project)
> on TomEE beta 2, I noticed that the logs and data for the embedded h2
> datasource end up as hsqldb equivalents in [TOMEE HOME]/data/hsqldb/.
> The datasource definition in web.xml is as follows:
> {code:xml}
> <data-source>
> <name>java:app/MyApp/myDS</name>
> <class-name>org.h2.jdbcx.JdbcDataSource</class-name>
> <url>jdbc:h2:~/mydb;DB_CLOSE_DELAY=-1</url>
> <user>sa</user>
> <password>sa</password>
> <transactional>true</transactional>
> <isolation-level>TRANSACTION_READ_COMMITTED</isolation-level>
> <initial-pool-size>2</initial-pool-size>
> <max-pool-size>10</max-pool-size>
> <min-pool-size>5</min-pool-size>
> <max-statements>0</max-statements>
> </data-source>
> {code}
> So clearly it should be using h2, and the DB should be created in my home as
> {{mydb}}. When I remove the h2 implementation jar from WEB-INF/lib, TomEE
> does complain, so it does try to do something with h2 for sure. Inspecting
> the log reveals it really are hsqldb log lines and not h2.
> What's happening here? Why is TomEE silently swapping one DB for the other?
>
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