Re: GWT + CellTable + Paging with Hibernate

Any one can show me the direction of how to use Paging? Thank yopu

2012/1/23 Daniel Mauricio Patino León <ceo.lion.dev@gmail.com>

Hello everyone.

I dont understan how paging works, and i cant get a SimplePaging get
work with my example.

I have a CellTable whit my own AsyncDataProvider:

public class PersonDataProvider extends
AsyncDataProvider<PersonProxy>  {

       private final PersonRequestFactory requestFactory;

       public PersonDataProvider(PersonRequestFactory requestFactory) {
               super(null);
               this.requestFactory = requestFactory;
       }
       @Override
       protected void onRangeChanged(final HasData<PersonProxy> display) {
               final Range range = display.getVisibleRange();
               final int start = range.getStart();
               /* not used insted use display.getVisibleRange().getLength() as MAX
values*/
               final int end = start + range.getLength();


requestFactory.personRequest().getAllPersons(start,display.getVisibleRange().getLength()).with("pet").fire(new
Receiver<List<PersonProxy>>(){
                        @Override
                   public void onSuccess(List<PersonProxy> response) {
                        /* what should i have here? */
                        updateRowData(start, response);
                   }
               });
       }

    @Override
       public void addDataDisplay(HasData<PersonProxy> display) {
                super.addDataDisplay(display);
             // Request the count anytime a view is added.
            requestFactory.personRequest().countPersons().fire(new
Receiver<Long>(){
                 public void onSuccess(Long response) {
                         // the total count from server
                     updateRowCount(response.intValue(), true);
                   }
             });
       }
}


Then i got in my DataAccesObject:

public List<Person> getAllPersons(int start,int max){
               Session session = HibernateUtil.getSessionFactory().openSession();
               Transaction tx = null;
               try {
                       tx = session.beginTransaction();

                       System.out.println(" limit "+start+",5");
                       @SuppressWarnings("unchecked")
                       List<Person> persons =
session.createCriteria(Person.class).addOrder(Order.desc("myAge")).setFirstResult(start).setMaxResults(max).list();

                       System.out.println("List size "+persons.size());

                       tx.commit();
                       return persons;
               } catch (RuntimeException e) {
                       if (tx != null)
                               tx.rollback();
                       throw e;
               } finally {
                       session.close();
               }
}


But i cant it work the paging isn't show me the right berhaivor.

How can i use SimplePager with Hibernate on the server Side.

Thank you.

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ISC. Daniel Mauricio Patiño León.

Director ejecutivo

Liondev S.A. de C.V.

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