Hibernate Community • View topic - Updates in Java SE environment

View unanswered posts | View active topics

Board index » Projects » Search, Validator, Shards

All times are UTC - 5 hours [ DST ]

Updates in Java SE environment

Page 1 of 1

[ 5 posts ]

Previous topic | Next topic

Author

Message

aspa

Post subject: Updates in Java SE environment

Posted: Thu Jul 13, 2006 12:41 pm

Newbie

Joined: Fri Jun 23, 2006 3:40 pm
Posts: 11

i'm having problems updating entities. when i update a managed object, changes are not propagated to the database.

should i define transaction boundaries to make updates happen?

here's the code:

Code:

EntityManagerFactory emf =
  Persistence.createEntityManagerFactory("spider");
EntityManager em = emf.createEntityManager();

RemoteFilePK id = new RemoteFilePK();
id.dir = "smb://localhost/spider/company2/";
id.name = "a11k";
RemoteFile f = em.find(RemoteFile.class, id);
f.setDescription("foobar "+new Date()); // not persisted to db

persistence.xml:

Code:

<persistence xmlns="http://java.sun.com/xml/ns/persistence"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">
  <persistence-unit name="spider">
    <non-jta-data-source>jdbc/spiderDS</non-jta-data-source>
    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
    </properties>
  </persistence-unit>
</persistence>

Top

alesj

Post subject: Re: Updates in Java SE environment

Posted: Fri Jul 14, 2006 3:30 am

Expert

Joined: Sat Oct 25, 2003 8:49 am
Posts: 490
Location: Vrhnika, Slovenia

aspa wrote:

should i define transaction boundaries to make updates happen?

Yep.

Who manages transactions for you now?

Top

aspa

Post subject: Re: Updates in Java SE environment

Posted: Tue Jul 18, 2006 2:24 pm

Newbie

Joined: Fri Jun 23, 2006 3:40 pm
Posts: 11

alesj wrote:

aspa wrote:

should i define transaction boundaries to make updates happen?

Yep.

Who manages transactions for you now?

no one, as far as i understand.

so, should i just use explicit transaction management like this?

EntityManagerFactory emf = Persistence.createEntityManagerFactory();
EntityManager em = emf.createEntityManager();
EntityTransaction tx = em.getTransaction();
try {
tx.begin();
// read managed objects
// update managed objects
tx.commit();
} catch (RollbackException ex) { }

Top

alesj

Post subject:

Posted: Tue Jul 18, 2006 2:29 pm

Expert

Joined: Sat Oct 25, 2003 8:49 am
Posts: 490
Location: Vrhnika, Slovenia

Yep.

Add a rollback into catch.
And close into finally.

Top

aspa

Post subject:

Posted: Wed Jul 19, 2006 12:21 pm

Newbie

Joined: Fri Jun 23, 2006 3:40 pm
Posts: 11

alesj wrote:

Yep.

Add a rollback into catch.
And close into finally.

thanks!

Top

Page 1 of 1

[ 5 posts ]

Board index » Projects » Search, Validator, Shards

All times are UTC - 5 hours [ DST ]

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum