Examples of org.hibernate.Transaction

org.hibernate.Transaction
Allows the application to define units of work, while maintaining abstraction from the underlying transaction implementation (eg. JTA, JDBC).

A transaction is associated with a Session and is usually instantiated by a call to Session.beginTransaction(). A single session might span multiple transactions since the notion of a session (a conversation between the application and the datastore) is of coarser granularity than the notion of a transaction. However, it is intended that there be at most one uncommitted Transaction associated with a particular Session at any time.

Implementors are not intended to be threadsafe. @see Session#beginTransaction() @see org.hibernate.transaction.TransactionFactory @author Anton van Straaten

   * @throws PersistenceManagerException in case of any problems.
   */
  public void deleteItem(ItemIF item)
    throws PersistenceManagerException {


    Transaction tx = null;
    try {
      final Session session = HibernateUtil.openSession();
      tx = session.beginTransaction();


      // Create item object and save to database
      deleteItem(item, session);


      tx.commit();
      item.setId(-1);
    } catch (Exception e) {
      if (tx != null) {
        try {
          tx.rollback();
        } catch (HibernateException e1) {
          // We can do nothing here.
        }
      }

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   * @throws PersistenceManagerException in case of any problems.
   */
  private void saveCreatedItem(ChannelIF channel, final ItemIF item)
    throws PersistenceManagerException {


    Transaction tx = null;
    try {
      final Session session = HibernateUtil.openSession();
      tx = session.beginTransaction();


      // Save item to database
      HibernateUtil.lock(channel, session);
      createItem(item, channel, session);


      tx.commit();
    } catch (Exception e) {
      if (tx != null) {
        try {
          tx.rollback();
        } catch (HibernateException e1) {
          // We can do nothing here.
        }
      }

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  }
  
  protected DBTransaction beginDbTransaction() {
    if (trxWrapper == null || trxWrapper.isCommitted()) {
      try {
        Transaction trx = hibernateSession.beginTransaction();
        trxWrapper = new DBTransaction(trx);
        return trxWrapper;
      } catch (HibernateException e) {
        throw new DBRuntimeException("DBSession - could not begin DBTransaction", e);
      }

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   *
   */
  public void fill() throws JRException
  {
    Session session = createSession();
    Transaction transaction = session.beginTransaction();


    Map params = getParameters(session);
    
    File[] files = 
      new File[]{
        new File("build/reports/AddressesReport.jasper"),
        new File("build/reports/HibernateQueryReport.jasper")
      };
    for(int i = 0; i < files.length; i++)
    {
      File reportFile = files[i];
      long start = System.currentTimeMillis();
      JasperFillManager.fillReportToFile(reportFile.getAbsolutePath(), params);
      System.err.println("Report : " + reportFile + ". Filling time : " + (System.currentTimeMillis() - start));
    }
    
    transaction.rollback();
    session.close();
  }

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  public void deleteTestDataAndCloseSession() {
    session.clear();
    if ( session.getTransaction().isActive() ) {
      session.getTransaction().rollback();
    }
    Transaction transaction = session.beginTransaction();


    Novel novel = (Novel) session.get( Novel.class, "novel-1" );
    if ( novel != null ) {
      session.delete( novel );
    }


    Animal animal = (Animal) session.get( Animal.class, "animal-1" );
    if ( animal != null ) {
      session.delete( animal );
    }


    animal = (Animal) session.get( Animal.class, "animal-2" );
    if ( animal != null ) {
      session.delete( animal );
    }


    Zoo zoo = (Zoo) session.get( Zoo.class, "zoo-1" );
    if ( zoo != null ) {
      session.delete( zoo );
    }


    Contributor contributor = (Contributor) session.get( Contributor.class, "contributor-1" );
    if ( contributor != null ) {
      session.delete( contributor );
    }


    contributor = (Contributor) session.get( Contributor.class, "contributor-2" );
    if ( contributor != null ) {
      session.delete( contributor );
    }


    Project project = (Project) session.get( Project.class, "project-1" );
    if ( project != null ) {
      session.delete( project );
    }


    project = (Project) session.get( Project.class, "project-2" );
    if ( project != null ) {
      session.delete( project );
    }


    project = (Project) session.get( Project.class, "project-3" );
    if ( project != null ) {
      session.delete( project );
    }


    ProjectGroup projectGroup = (ProjectGroup) session.get( ProjectGroup.class, "project-group-1" );
    if ( projectGroup != null ) {
      session.delete( projectGroup );
    }


    transaction.commit();
    session.close();
  }

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    Novel novel = createAndPersistNovel();


    String newRevision = doConcurrentUpdateToNovel();
    assertThat( newRevision ).isNotEqualTo( novel.get_rev() );


    Transaction transaction = session.beginTransaction();
    novel.setDescription( "Description 2" );
    transaction.commit();
  }

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  @Test(expected = StaleObjectStateException.class)
  public void updateAfterConcurrentDeletionShouldCauseException() throws Exception {
    createAndPersistNovel();
    session.clear();


    Transaction transaction = session.beginTransaction();


    Novel novel = (Novel) session.get( Novel.class, "novel-1" );
    concurrentlyDeleteNovel();
    novel.setPosition( 2 );


    transaction.commit();
  }

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  public void deletionAfterConcurrentModificationShouldCauseException() throws Exception {
    Novel novel = createAndPersistNovel();


    doConcurrentUpdateToNovel();


    Transaction transaction = session.beginTransaction();
    session.delete( novel );
    transaction.commit();
  }

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    session.delete( novel );
    transaction.commit();
  }


  private Novel createAndPersistNovel() {
    Transaction transaction = session.beginTransaction();


    Novel novel = createNovel();


    assertThat( novel.get_rev() ).isNull();
    session.persist( novel );
    transaction.commit();
    assertThat( novel.get_rev() ).isNotNull();
    return novel;
  }

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      @Override
      public String call() throws Exception {
        Session session = openSession();


        Transaction transaction = session.beginTransaction();
        final Novel novel = (Novel) session.get( Novel.class, "novel-1" );
        novel.setDescription( "Description 2" );
        transaction.commit();


        return novel.get_rev();
      }
    } ).get();
  }

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