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dynamically configure javax.persistence.jdbc.url? [message #531822]

Thu, 06 May 2010 09:55

Olu

Messages: 29
Registered: October 2009

Junior Member

Hi,
I'm writing a desktop app in Jave SE and want to be able to enable the users to change the embedded JavadDB database they are working from on the fly.

Does any know if there is a way to pgramatically change the value of javax.persistence.jdbc.url and effectively restart the app?

I guess the longer (possibly "proper") way of doing this would be to make the modification/dB selection from a separate launcher app which makes the change to the url and restarts the main windown app.....anyone know a framework for doing this?

thanks,

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Re: dynamically configure javax.persistence.jdbc.url? [message #531834 is a reply to message #531822]

Thu, 06 May 2010 10:16

Tom Eugelink

Messages: 817
Registered: July 2009

Senior Member

On 2010-05-06 11:55, Olu wrote:
> Hi,
> I'm writing a desktop app in Jave SE and want to be able to enable the
> users to change the embedded JavadDB database they are working from on
> the fly.
>
> Does any know if there is a way to pgramatically change the value of
> javax.persistence.jdbc.url and effectively restart the app?
>
> I guess the longer (possibly "proper") way of doing this would be to
> make the modification/dB selection from a separate launcher app which
> makes the change to the url and restarts the main windown app.....anyone
> know a framework for doing this?
>
> thanks,

Like this?

Map<String, Object> lOptions = new HashMap<String, Object>();
lOptions.put(PersistenceUnitProperties.JDBC_DRIVER, lDriver);
lOptions.put(PersistenceUnitProperties.JDBC_URL, lUrl);
lOptions.put(PersistenceUnitProperties.JDBC_USER, lUsr);
lOptions.put(PersistenceUnitProperties.JDBC_PASSWORD, lPwd);
lOptions.put(PersistenceUnitProperties.TARGET_DATABASE, "Informix");
lOptions.put(PersistenceUnitProperties.TARGET_SERVER, TargetServer.None);
EntityManagerFactory lEntityManagerFactory = Persistence.createEntityManagerFactory("xxxx", lOptions);

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