Re: concurrency problem - how to make the program wait?

Thank you. This story is really great. It solved my problem ;)
I was still thinking in a wrong way.

Thanks again.
Mark

On 29 Mai, 17:34, Paul Robinson <ukcue...@gmail.com> wrote:
> Take a look at the great beer story:http://groups.google.com/group/Google-Web-Toolkit/browse_thread/threa...
>
> This story should be included in Google's GWT FAQ
>
> Paul
>
>
>
> Mark wrote:
> > Hello,
>
> > I've got a strange (at least for me) problem:
>
> > Start.java:
>
> > new RetrieveDeck(deck);  // this starts a new query to the server
> > where it gets a json object
> > System.out.println(deck + " size:" + deck.size()); // get debug
> > information
>
> > RetrieveDeck.java:
>
> > public RetrieveDeck(FlashCardList deck) {
> >    this.deck = deck;
>
> >    String url = URL.encode(GWT.getModuleBaseURL() + "sampleDeck");
> >    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
>
> >    builder.sendRequest(null, new RequestCallback() {
> >            @Override
> >            public void onResponseReceived(Request request,
> >                    Response response) {
> >                                    if (200 == response.getStatusCode()) {
> >                                            JsArray<FlashCardData> tmp = FlashCardData
> >                                                            .asArrayOfFlashCards(response.getText());
>
> >                                            getDeck().populate(tmp); // here i pass the data to be added in
> > a list
> >                    });
>
> >    protected FlashCardList getDeck() {
> >            return deck;
> >    }
> > }
>
> > List.java:
>
> > public void populate(JsArray<FlashCardData> decks) {
> >    for (int i = 0; i < decks.length(); i++) {
> >            add( /* get a lot of infomation and add it to the list */);
> >    }
> >    System.out.println(this + " size:" + size());  // get debug
> > information
> > }
>
> > This all should work fine (I think) but if I run the program I get the
> > following output:
>
> > .client.cards.FlashCardList@19fdee7 size:0 // this is from Start.java
> > .client.cards.FlashCardList@19fdee7 size:2 // this is form List.java
>
> > As you can see the empty list at the beginning is first printed ...
> > How can I make the program stop until the list is populated?
>
> > Thank you very much.
> > Mark

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