Hi,
The InputStream / reader support is not documented yet, I want to provide
some documentation soon.
BTW I sent a patch for the InputStream / Reader support a week ago, this
patch solves some bugs, Can you review and commit the patch? Thanks in
advance!!
On Fri, Apr 4, 2008 at 5:32 PM, Patrick Linskey <[EMAIL PROTECTED]> wrote:
> > > 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
>
