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Re: [eclipselink-users] Getting a database connection with EntityManagerImpl
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Hi Antonio,
Take a look at the org.eclipse.persistence.jpa.JpaHelper class. It is built
specifically to expose the non-JPA-standard-based functionality. The
getServerSession(emf) method is likely the method that would be most useful to you.
With the server session you can get a hold of alot of the underlying data
structures.
-Tom
Antonio Goncalves wrote:
Hi,
I'm using DbUnit with EclipseLink for unit testing. I sent an email to
the DbUnit mailing list wondering if there was a easier way to get a
database connection using the information included in a persistence.xml
file. Julien Tabouret replied with a hint on the method
EntityManager.getDelegate(). His example (see below) uses Hibernate.
With EclipseLink the EntityManager.getDelegate() method returns
an org.eclipse.persistence.internal.jpa.EntityManagerImpl object. I
can't find any documentation about this class
(http://www.eclipse.org/eclipselink/api/1.0.1/index.html).
Do you know how I can get a database connection (to give to dbunit) with
the EntityManagerImpl object ?
Thanks,
Antonio
---------- Forwarded message ----------
From: *julien tabouret* <julien.tabouret@xxxxxxxxx
<mailto:julien.tabouret@xxxxxxxxx>>
Date: 2008/9/17
Subject: Re: [dbunit-user] Persistence.xml
To: dbunit-user@xxxxxxxxxxxxxxxxxxxxx
<mailto:dbunit-user@xxxxxxxxxxxxxxxxxxxxx>
Hello,
If you have a /persistence.xml/ file, I assume that you're using an
/EntityManager/. If so, the */getDelegate()/* method could help you
since it retrieves the underlying object for the /EntityManager/.
For example, if your O/R mapping provinder is Hibernate, you will get an
/org.hibernate.impl.SessionImpl/. Then the /connection()/ method will
gives you the JDBC connection required by dbunit.
Hope it can help.
--
Julien
2008/9/17 Antonio Goncalves <antonio.mailing@xxxxxxxxx
<mailto:antonio.mailing@xxxxxxxxx>>
Hi,
I was wondering if DBUnit has some facilities to integrate a
persistence.xml file. In the persistence.xml file file there is
already the JDBC Driver, the connection URL to the database, login,
pwd... everthing needed to connect to a DB. What I'm doing at the
moment is duplicating this information into my code sych as :
protected IDatabaseConnection getConnection() throws Exception {
Class driverClass =
Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
Connection jdbcConnection =
DriverManager.getConnection("jdbc:derby:myDB.sql;create=true",
"APP", "APP");
return new DatabaseConnection(jdbcConnection);
}
it would be nice just to have new
DatabaseConnection("persistence.xml"). Because the properties change
depending on the prodiver, we could also have something like w
DatabaseConnection("persistence.xml", ORACLE).
Any ideas ?
--
Antonio Goncalves (antonio.goncalves@xxxxxxxxx
<mailto:antonio.goncalves@xxxxxxxxx>)
Software architect
Paris JUG leader : www.parisjug.org <http://www.parisjug.org>
Web site : www.antoniogoncalves.org <http://www.antoniogoncalves.org>
Blog: jroller.com/agoncal <http://jroller.com/agoncal>
LinkedIn: www.linkedin.com/in/agoncal
<http://www.linkedin.com/in/agoncal>
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--
--
Antonio Goncalves (antonio.goncalves@xxxxxxxxx
<mailto:antonio.goncalves@xxxxxxxxx>)
Software architect
Paris JUG leader : www.parisjug.org <http://www.parisjug.org>
Web site : www.antoniogoncalves.org <http://www.antoniogoncalves.org>
Blog: jroller.com/agoncal <http://jroller.com/agoncal>
LinkedIn: www.linkedin.com/in/agoncal <http://www.linkedin.com/in/agoncal>
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