Hi,
the problem is in setHeadline in Purchase - it must be:
public void setHeadline(String headline){
this.headline = headline;
}
Best regards,
Basdl
On Feb 13, 12:14 am, Bastian <[email protected]> wrote:
> Hello,
>
> I hope everyone is fine. I have started to use RPC’s with GWT. I have
> worked through the examples and tutorials and I believe understand how
> it works. Now, I have created my own class to serialize and use in an
> asynchronous callback so that the client can receive data about a
> purchase from a server. Everything compiles properly and the onSuccess
> method gets executed, but when I try to read the received data, it
> only is “Null”. Does anyone have an idea what might be wrong with my
> code?
>
> Thanks a lot.
>
> Best regards,
>
> Bastian
>
> Here is my code:
>
> Class to store the data in client package:
>
> import java.io.Serializable;
>
> @SuppressWarnings("serial")
> public class Purchase implements Serializable {
>
> private String username;
> private String headline;
> private String description;
>
> public Purchase()
> {
>
> }
>
> public String getUsername(){
> return username;
> }
>
> public String getHeadline(){
> return this.headline;
> }
>
> public String getDescription(){
> return description;
> }
>
> public void setUsername(String username){
> this.username = username;
> }
>
> public void setHeadline(String headline){
> this.username = headline;
> }
>
> public void setDescription(String description){
> this.description = description;
> }
>
> }
>
> Service Interface in client package:
>
> import com.google.gwt.user.client.rpc.RemoteService;
> import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
>
> @RemoteServiceRelativePath("collectivePurchase")
> public interface CollectivePurchaseService extends RemoteService {
> Purchase getCollectivePurchase(String username);
>
> }
>
> Async Interface in the client package:
>
> import com.google.gwt.user.client.rpc.AsyncCallback;
>
> public interface CollectivePurchaseServiceAsync {
>
> void getCollectivePurchase(String username, AsyncCallback<Purchase>
> callback);
>
> }
>
> Server implementation:
>
> import com.google.gwt.user.server.rpc.RemoteServiceServlet;
>
> @SuppressWarnings("serial")
> public class CollectivePurchaseServiceImpl extends
> RemoteServiceServlet implements CollectivePurchaseService {
>
> public Purchase getCollectivePurchase(String username) {
>
> com.biddrocket.secretrocket.client.Purchase collective = new
> com.biddrocket.secretrocket.client.Purchase();
> collective.setUsername("brian");
> collective.setHeadline("motor bike");
> collective.setDescription("most amazing bike");
>
> return collective;
>
> }
>
> }
>
> Client entry point:
>
> CollectivePurchaseServiceAsync collectivePurchaseService =
> (CollectivePurchaseServiceAsync)
> GWT.create(CollectivePurchaseService.class);
>
> collectivePurchaseService.getCollectivePurchase("brian ley", new
> AsyncCallback<Purchase>() {
> public void
> onFailure(Throwable caught) {
>
> Window.alert(caught.getLocalizedMessage());
> }
> @Override
> public void
> onSuccess(Purchase result) {
> update(result);
>
> }
> });
>
> //Make the call to the RPC to get the headline for the
> gallery
> showcase
> //collectivePurchaseService.getHeadline("brian", callback);
> }
> public void update(Purchase collective){
> Window.alert(collective.getHeadline());
> }
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