GXT 3 Can't fill Grid - grid

Question

I want to load data from a remote server in the grid. The following code:
final RepServiceAsync service = GWT.create(RepService.class);
final RepProperties props = GWT.create(RepProperties.class);
RpcProxy<PagingLoadConfig, PagingLoadResult<ReportsList>> proxy = new RpcProxy<PagingLoadConfig, PagingLoadResult<ReportsList>>() {
#SuppressWarnings("unchecked")
#Override
public void load(PagingLoadConfig loadConfig, AsyncCallback callback) {
service.getReports(callback);
}
};
ListStore<ReportsList> store = new ListStore<ReportsList>(props.key());
final PagingLoader<PagingLoadConfig, PagingLoadResult<ReportsList>> loader = new PagingLoader<PagingLoadConfig, PagingLoadResult<ReportsList>>(
proxy);
loader.setRemoteSort(true);
loader.addLoadHandler(new LoadResultListStoreBinding<PagingLoadConfig, ReportsList, PagingLoadResult<ReportsList>>(
store));
final PagingToolBar toolBar = new PagingToolBar(50);
toolBar.getElement().getStyle().setProperty("borderBottom", "none");
toolBar.bind(loader);
ColumnConfig<ReportsList, String> nameCol = new ColumnConfig<ReportsList, String>(
props.name(), 150, "Name");
ColumnConfig<ReportsList, String> pathCol = new ColumnConfig<ReportsList, String>(
props.path_name(), 150, "Path");
List<ColumnConfig<ReportsList, ?>> l = new ArrayList<ColumnConfig<ReportsList, ?>>();
l.add(nameCol);
l.add(pathCol);
ColumnModel<ReportsList> cm = new ColumnModel<ReportsList>(l);
Grid<ReportsList> grid = new Grid<ReportsList>(store, cm) {
#Override
protected void onAfterFirstAttach() {
super.onAfterFirstAttach();
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
#Override
public void execute() {
loader.load();
}
});
}
};
grid.getView().setForceFit(true);
grid.setLoadMask(true);
grid.setLoader(loader);
RepProperties:
public interface RepProperties extends PropertyAccess<ReportsList> {
#Path("id")
ModelKeyProvider<ReportsList> key();
ValueProvider<ReportsList, String> name();
ValueProvider<ReportsList, String> path_name();
}
ReportsList code:
public class ReportsList implements Serializable {
private static final long serialVersionUID = 1L;
int id;
String name;
String path_name;
public ReportsList() {
}
public ReportsList(int id, String name, String path_name) {
super();
this.id = id;
this.name = name;
this.path_name = path_name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPath_name() {
return path_name;
}
public void setPath_name(String path_name) {
this.path_name = path_name;
}
}
GWT Servlet Impl:
public class RepServiceImpl extends RemoteServiceServlet implements RepService {
private static final long serialVersionUID = 1L;
#EJB
private ReportEjb repManager;
#Override
public List<Report> getReports() {
List<Report> reports = null;
reports = repManager.getReports();
return reports ;
}
}
The code is executed without error, the query to the database is performed ( EJB-call ), but the Grid is not populated.
In what could be the problem?

Answer 1

In my experience this usually means that there is an exception while trying to put data into the grid itself. Try attaching a LoadExceptionHandler to your loader and see what it gives you
e.g.
public class DebugLoadHandler implements LoadExceptioniHandler<ListLoadConfig> {
#Override
public void onLoadException(LoadExceptionEvent<ListLoadConfig> event) {
Window.alert("Load Exception" + event.getException().getMessage());
}
}