Sanku-
If you look in Main.java, you can see we are passing the System
properties to the EntityManager creation process:
EntityManagerFactory factory = Persistence.
createEntityManagerFactory("hellojpa",
System.getProperties());
In the parent directory's build.xml file, you can see we pass system
properties to the <java> process that declares the database driver,
URL, connection name, and password.
This step of indirection might be a bit confusing, but it does allow
you to easily swap out properties for some other database you want to
test by just specifying them on the command line. E.g., something like:
ant -Ddbdriver=com.somecompany.Driver -Ddburl=jdbc:somedburl -
Dbuser=myuser -Ddbpass=somepass
Of course, you can always just un-comment the <properties> section of
the persistence.xml and not bother passing the system properties to
the creation process as well.
On May 14, 2007, at 2:14 AM, <[EMAIL PROTECTED]> wrote:
Hi JPA Team,
I am trying to learn JPA and thanks for your efforts to develop the
JPA.
I am trying to execute the sample program given in 5 minute quick
start
guide to OpenJPA <http://incubator.apache.org/openjpa/quick-
start.html>
. I am able to execute and see the result in console. But how to
connect
to Derby database which is comes along with the package. In
persistence.xml I found that you open the connection. But how to
connect
derby database and see the data in the table Message (since we are
creating & inserting into the Message table).
Thanks,
Regards
Sanku Subrahmanyam
Accenture - Bangalore
Ph : 080 4106 2113
Mob: 9886623009
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