forgot one more interface for invoke the service
public interface GwtActionService extends RemoteService {
<T extends Response> T execute(Action<T> action);
}
On Sep 21, 11:22 pm, Mike Wyszinski <[email protected]> wrote:
> wondering why this results in a serialization exception(running it in
> debugger-> com.google.gwt.dev.GWTShell)
> code snippets below....
>
> I really like just needing to deal with the onSucceded() in my
> presenter code
> and leaving the onfailure,lookup & invocation code in the action.
> This way i can easily re-use the AddEmail
> and just specialize the onSuceeded() code to update whichever display
> i happen to be working on.
>
> should this approach work?
>
> //=========================================================
> // Command pattern with some centrallized error handling
> //=========================================================
> public interface Response extends IsSerializable {}
> public interface Action<T extends Response> extends IsSerializable {}
>
> public abstract class BaseAction<T extends Response> implements
> Action<T>,AsyncCallback<T> {
> public abstract void invoke();
> public abstract void onSucceded(T value);
>
> @Override
> public void onFailure(Throwable error) {
> //based onExceptiontype do something(irrelevant here)
> }
> @Override
> public void onSuccess(T value) {
> try {
> onSucceded(value);
> } catch (RuntimeException error) {
> onFailure(error);
> }
> }
>
> }
>
> public class AddEmailAction extends BaseAction<AddEmailResponse> {
> private static final long serialVersionUID = 1L;
> protected String email;
> public AddEmailAction() {
> }
> public AddEmailAction(String email) {
> this.email = email;
> }
>
> @Override
> public void invoke() {
> //note: i initialize the rpc service in the entrypoint class
> EntryPoint.RPCSERVICE.execute(this, this);
> }
>
> public String getEmail() {
> return email;
> }
>
> public void setEmail(String email) {
> this.email = email;
> }
>
> }
>
> //============================================
> //in the presentation tier, I try to invoke it
> //============================================
> class XYZPresenter{
> ....
> private void handleAddEmail(final String email){
> new AddEmailAction(email){
> @Override
> public void onSucceded(AddEmailResponse value) {
> display.addEmail(email);
> }
> }.invoke(); <-ends up triggering -
>
> >com.google.gwt.user.client.rpc.SerializationException
> }
> }
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