> > Additionally, note that OpenJPA 1.1.0-SNAPSHOT has support for fields
> > of type InputStream; with this support, OpenJPA will never fully load
> > the data into memory.
> I can see how this will work for readonly values, how about write ones?
> Also looking in the 1.1.0 manual I can not find any reference to InputStream.
I think it hasn't been documented yet. Take a look at
InputStreamLobTest for an example.
For write values, you simply assign the InputStream field to the
stream that OpenJPA should read from when streaming to the database:
@Entity
public class Picture {
@Persistent private InputStream data;
public void streamContentsIntoDatabase(InputStream is) {
data = is;
}
public InputStream streamContentsFromDatabase() {
return is;
}
}
-Patrick
On Fri, Apr 4, 2008 at 6:57 AM, David Goodenough
<[EMAIL PROTECTED]> wrote:
> On Tuesday 01 April 2008, Patrick Linskey wrote:
> > Or, even more simply:
> >
> > em.getTransaction().begin();
> > Connection c = OpenJPAPersistence.cast(em).getConnection();
> Actually for what I need I need to cast this to a DelegatingConnection
> and then get the PGConnection by casting its InnermostDelegate.
> But yes, this works - thank you.
>
> > try {
> > ...
> > } finally {
> > c.close(); // the connection is a wrapper; this decrements the
> > reference count
> > }
> > em.getTransaction().commit();
> >
> > Additionally, note that OpenJPA 1.1.0-SNAPSHOT has support for fields
> > of type InputStream; with this support, OpenJPA will never fully load
> > the data into memory.
> I can see how this will work for readonly values, how about write ones?
> Also looking in the 1.1.0 manual I can not find any reference to InputStream.
>
> David
>
>
> >
> > -Patrick
> >
> > On Mon, Mar 31, 2008 at 8:31 PM, Pinaki Poddar <[EMAIL PROTECTED]> wrote:
> > > Hi,
> > > Following should work:
> > >
> > >
> > >
> > > import javax.persistence.EntityManager;
> > > import org.apache.openjpa.kernel.Broker;
> > > import org.apache.openjpa.jdbc.kernel.JDBCStore;
> > > import org.apache.openjpa.persistence.JPAFacadeHelper;
> > > import java.sql.Connection;
> > >
> > > EntityManager em = emf.createEntityManager();
> > > Broker broker = JPAFacadeHelper.toBroker(em);
> > >
> > > JDBCStore store = (JDBCStore)broker.getStoreManager();
> > > Connection con = store.getConnection();
> > >
> > > David Goodenough-3 wrote:
> > > > I need to get to the real JDBC Connection object so that I can do some
> > > > processing using Postgresql extensions (in particular the LargeObject
> > > > support). I do not expect OpenJPA to understand what I am doing, but
> > > > I need to access the Connection object and I need what I do to be
> > > > in the same transaction as that used by OpenJPA (so also it needs to
> > > > be the same transaction).
> > > >
> > > > The manual suggests:-
> > > >
> > > > OpenJPAEntityManagerFactory kemf = OpenJPAPersistence.cast(emf);
> > > > OpenJPAConfiguration conf = kemf.getConfiguration();
> > > >
> > > > on page 190, but kemf does not have a getConfiguration method
> > > > according to Eclipse (using OpenJPA 1.0.2).
> > > >
> > > > The OpenJPAConfiguration javadoc is not much use either in that it
> > > > does tell me where to get it from.
> > > >
> > > > Any ideas?
> > > >
> > > > David
> > >
> > > --
> > > View this message in context:
> > > http://www.nabble.com/How-to-get-I-get-to-the-read-JDBC-Connection-object
> > >...-tp16400383p16401689.html Sent from the OpenJPA Users mailing list
> > > archive at Nabble.com.
>
>
>
--
Patrick Linskey
202 669 5907
