Hi Randell, I'm guessing this is an App Engine project, in which case your server-side questions will likely get more response on the App Engine forum:
http://groups.google.com/group/google-appengine/topics HTH, /dmc On Thu, May 26, 2011 at 11:09 AM, Randell Schneider < randellschnei...@gmail.com> wrote: > Hi There, > > I'm Starting a Web Project with GWT and some problems about datastore > delete by ID. > > do not know why having this problem. I think it should be the primary > key generation. > > OBS: getters and setters were not placed in this post > > Class GRUPO: > > import javax.jdo.PersistenceManager; > import javax.jdo.annotations.Extension; > import javax.jdo.annotations.IdGeneratorStrategy; > import javax.jdo.annotations.IdentityType; > import javax.jdo.annotations.PersistenceCapable; > import javax.jdo.annotations.Persistent; > import javax.jdo.annotations.PrimaryKey; > import javax.jdo.listener.StoreCallback; > > import com.metadot.book.connectr.shared.GrupoDTO; > > @PersistenceCapable(identityType = IdentityType.APPLICATION, > detachable = "true") > public class Grupo implements StoreCallback { > > @PrimaryKey > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) > @Extension(vendorName = "datanucleus", key = "gae.encoded- > pk", value = "true") > private String id; > > @Persistent > private String GrupoNome; > > > @SuppressWarnings("unused") > @Persistent > private UserAccount userAccount; > > public Grupo() { > } > > public Grupo(GrupoDTO grupoDTO) { > this(); > this.setBasicInfo(grupoDTO.getGrupoNome()); > } > } > > > > Class GrupoList.java: > > import com.google.gwt.core.client.GWT; > import com.google.gwt.uibinder.client.UiBinder; > import com.google.gwt.uibinder.client.UiField; > import com.google.gwt.user.client.Window; > import com.google.gwt.user.client.rpc.AsyncCallback; > import com.google.gwt.user.client.ui.Composite; > import com.google.gwt.user.client.ui.VerticalPanel; > import com.google.gwt.user.client.ui.Widget; > import com.metadot.book.connectr.shared.GrupoDTO; > > public class GrupoList extends Composite { > > private static GrupoListUiBinder uiBinder = GWT > .create(GrupoListUiBinder.class); > > interface GrupoListUiBinder extends UiBinder<Widget, GrupoList> > { > } > > @UiField > VerticalPanel gruposPanel; > > private List<GrupoDTO> grupoDTOs; > > private final static GrupoServiceAsync grupoService = GWT > .create(GrupoService.class); > > public GrupoList() { > initWidget(uiBinder.createAndBindUi(this)); > } > > public GrupoList(List<GrupoDTO> grupoDTOs) { > this(); > this.grupoDTOs = grupoDTOs; > displayGrupos(); > } > > public void showGrupos() { > grupoService > .getGrupos(new AsyncCallback<List<GrupoDTO>>() { > public void onFailure(Throwable caught) { > Window.alert("An error occurred"); > } > > public void onSuccess(List<GrupoDTO> result) { > grupoDTOs = result; > displayGrupos(); > } > }); > } > > private void displayGrupos() { > for (final GrupoDTO grupo: grupoDTOs) { > gruposPanel.add(new GrupoItem(grupo)); > } > } > > } > > > > Class GrupoItem.java: > > import com.google.gwt.core.client.GWT; > import com.google.gwt.event.dom.client.ClickEvent; > import com.google.gwt.uibinder.client.UiBinder; > import com.google.gwt.uibinder.client.UiField; > import com.google.gwt.uibinder.client.UiHandler; > import com.google.gwt.user.client.Window; > import com.google.gwt.user.client.rpc.AsyncCallback; > import com.google.gwt.user.client.ui.Button; > import com.google.gwt.user.client.ui.Composite; > import com.google.gwt.user.client.ui.Label; > import com.google.gwt.user.client.ui.Widget; > import com.metadot.book.connectr.shared.GrupoDTO; > > public class GrupoItem extends Composite { > > private static GrupoItemUiBinder uiBinder = GWT > .create(GrupoItemUiBinder.class); > > interface GrupoItemUiBinder extends UiBinder<Widget, GrupoItem> > { > } > > @UiField > Label title; > @UiField > Button delete, edit; > > GrupoDTO grupo; > > private final static GrupoServiceAsync grupoService = GWT > .create(GrupoService.class); > > public GrupoItem() { > initWidget(uiBinder.createAndBindUi(this)); > } > > public GrupoItem(String title, String id) { > this(); > this.title.setText(title); > } > > public GrupoItem(GrupoDTO grupoDTO) { > this(); > this.grupo = grupoDTO; > this.title.setText(grupo.getGrupoNome()); > } > > public GrupoItem(String title) { > this(); > this.title.setText(title); > } > > private static void deleteGrupo(GrupoDTO grupo) { > grupoService.deleteGrupo(grupo.getId(), > new AsyncCallback<Boolean>() { > public void onFailure(Throwable caught) { > Window.alert("An error occurred"); > } > > public void onSuccess(Boolean result) { > ConnectrApp.get().cancelEditFriend(); > } > }); > > } > > @UiHandler("delete") > void onDeleteClick(ClickEvent e) { > if (Window.confirm("Deseja mesmo cancelar?")) { > deleteGrupo(grupo); > } > } > > @UiHandler("edit") > void onEditClick(ClickEvent e) { > // handle click > ConnectrApp.get().showEditGrupo(grupo.getId()); > } > > } > > > > at last the class GrupoServiceImpl.Java: > > import java.util.ArrayList; > import java.util.List; > import java.util.Set; > > import javax.jdo.PersistenceManager; > > import com.google.gwt.user.server.rpc.RemoteServiceServlet; > import com.metadot.book.connectr.client.GrupoService; > import com.metadot.book.connectr.server.domain.Grupo; > import com.metadot.book.connectr.server.domain.UserAccount; > import com.metadot.book.connectr.shared.GrupoDTO; > > @SuppressWarnings("serial") > public class GrupoServiceImpl extends RemoteServiceServlet > implements GrupoService{ > > public GrupoServiceImpl() { > AppMisc.populateDataStoreOnce(); > } > > public GrupoDTO updateGrupo(GrupoDTO grupoDTO) { > if (grupoDTO.getId() == null){ > Grupo newGrupo = addGrupo(grupoDTO); > return newGrupo.toDTO(); > } > > PersistenceManager pm = > PMF.get().getPersistenceManager(); > Grupo grupo = null; > try { > grupo = pm.getObjectById(Grupo.class, > grupoDTO.getId()); > grupo.updateFromDTO(grupoDTO); > } catch (Exception e) { > e.printStackTrace(); > } finally { > pm.close(); > } > return grupoDTO; > } > > > //AQUI E O DELETE > public Boolean deleteGrupo(String id) { > PersistenceManager pm = > PMF.get().getPersistenceManager(); > try { > Grupo grupo = pm.getObjectById(Grupo.class, id); > if (grupo != null) { > pm.deletePersistent(pm.getObjectById(Grupo.class, > id)); > } > } finally { > pm.close(); > } > return true; > } > > // criando novo Grupo object no Datastore > private Grupo addGrupo(GrupoDTO grupoDTO) { > > PersistenceManager pm = > PMF.get().getPersistenceManager(); > Grupo grupo = null; > try { > //usando um user default > UserAccount currentUser = > UserAccount.getDefaultUser(); // detached object > currentUser = pm.makePersistent(currentUser); // attach > grupo = new Grupo(grupoDTO); > currentUser.getGrupos().add(grupo); > } finally { > pm.close(); > } > return grupo; > } > > > public List<GrupoDTO> getGrupos() { > > List<GrupoDTO> listaGrupos = new ArrayList<GrupoDTO>(); > PersistenceManager pm = > PMF.get().getPersistenceManager(); > > try { > UserAccount user = UserAccount.getDefaultUser(pm); > Set<Grupo> grupos = user.getGrupos(); > for (Grupo grupo : grupos) { > listaGrupos.add(grupo.getGrupoNomeObj()); > } > } finally { > pm.close(); > } > > return listaGrupos; > } > } > > I do not know if I let go of some information. let me know anything > I'll post here > > Grateful now! > > -- > You received this message because you are subscribed to the Google Groups > "Google Web Toolkit" group. > To post to this group, send email to google-web-toolkit@googlegroups.com. > To unsubscribe from this group, send email to > google-web-toolkit+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-web-toolkit?hl=en. > > -- David Chandler Developer Programs Engineer, Google Web Toolkit w: http://code.google.com/ b: http://googlewebtoolkit.blogspot.com/ t: @googledevtools -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. 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