thank you very much. i solved the problem already thank you!
On Feb 6, 5:24 pm, Jason Essington <[email protected]> wrote:
> gregor is right, you are trying to perform your update synchronously
> but your request is happening asynchronously.
>
> A full explanation of your exact problem can be found in this
> post:http://groups.google.com/group/Google-Web-Toolkit/browse_thread/threa...
>
> -jason
>
> On Feb 6, 2009, at 6:10 AM, gregor wrote:
>
>
>
> > Your problem looks like it's here:
>
> > private void updateGrid1(GridPanel gridPanel, int cols, int rows) {
> > if (store != null) {
> > store.removeAll();
> > }
> > getData1(1); <<<<<<<<<<<< PROBLEM
>
> > Object[][] data = null;
>
> > if(displayData1!= null) { <<<<<<<<<PRBLEM: displayData not
> > yet updated!!!!!!!!
> > data = getCompanyData(displayData1, 1);
> > }
> > else {
> > System.out.println("exception at update1();");
> > return;
> > }
>
> > caused by:
>
> > // success
> > public void onSuccess(Object result) {
> > // Cast the result into the object that was sent
> > // This casts the random object into DataContainer
> > // Since the object is an array we use []
> > displayData1 = (DataContainer[]) result; <<<<<<<< CAUSE:
> > you set variable, you do not call grid update method
>
> > }
> > };
>
> > what you need to do is rearrange your logic to call updateGrid1(..)
> > from the async callback onSuccess(..) method. What is happening at the
> > moment is that the grid update code is running at the same time the
> > RPC call is executing over the wire, so ther is no new data in
> > displayData1.
>
> > regards
> > gregor
>
> > On Feb 6, 12:33 pm, ytbryan <[email protected]> wrote:
> >> can someone help?
>
> >> below are my rpc request code.
>
> >> private void getData() {
>
> >> AsyncCallback<Object> callback = new AsyncCallback<Object>() {
> >> // fail
> >> public void onFailure(Throwable ex) {
> >> RootPanel.get().add(new HTML(ex.toString()));
> >> }
> >> // success
> >> public void onSuccess(Object result) {
> >> // Cast the result into the object that was sent
> >> // This casts the random object into DataContainer
> >> // Since the object is an array we use []
> >> DataContainer[] displayData = (DataContainer[]) result;
> >> }
> >> };
>
> >> callProvider.getData(callback);
> >> }
> >> private void getData1() {
> >> final int value1 = value;
>
> >> AsyncCallback<Object> callback1 = new
> >> AsyncCallback<Object>()
> >> {
> >> // fail
>
> >> public void onFailure(Throwable ex) {
> >> RootPanel.get().add(new HTML(ex.toString()));
>
> >> }
> >> // success
> >> public void onSuccess(Object result) {
> >> // Cast the result into the object that was sent
> >> // This casts the random object into DataContainer
> >> // Since the object is an array we use []
> >> displayData1 = (DataContainer[]) result;
>
> >> }
> >> };
>
> >> // remote procedure call to the server to get the data
> >> callProvider1.getData1(callback1);
>
> >> }
>
> >> below is updategrid1 code which calls the getData1() code
>
> >> private void updateGrid1(GridPanel gridPanel, int cols, int rows) {
> >> if (store != null) {
> >> store.removeAll();
> >> }
> >> getData1(1);
>
> >> Object[][] data = null;
>
> >> if(displayData1!= null) {
> >> data = getCompanyData(displayData1, 1);
> >> }
> >> else {
> >> System.out.println("exception at update1();");
> >> return;
> >> }
>
> >> RecordDef recordDef = new RecordDef(
> >> new FieldDef[]{
>
> >> new StringFieldDef("date"),
> >> new IntegerFieldDef("opensource"),
> >> new IntegerFieldDef("trial"),
> >> new IntegerFieldDef("sales"),
> >> new StringFieldDef("ostrial"),
> >> new StringFieldDef("trialsale") ,
> >> new StringFieldDef("ossale")
> >> }
> >> );
> >> ColumnConfig[] columns = new ColumnConfig[]{
> >> //column ID is company which is later used in
> >> setAutoExpandColumn
> >> new ColumnConfig("Date", "date", 160, true, null,
> >> "company"),
> >> new ColumnConfig("Open Source", "opensource", 35,true),
> >> new ColumnConfig("Trial", "trial", 45,true),
> >> new ColumnConfig("Sales", "sales", 65,true),
> >> new ColumnConfig("OS-Trial", "ostrial", 65),
> >> new ColumnConfig("Trial-Sale", "trialsale", 60, true),
> >> new ColumnConfig("OS-Sale", "ossale", 60, true)
> >> };
>
> >> ColumnModel columnModel = new ColumnModel(columns);
>
> >> MemoryProxy proxy = new MemoryProxy(data);
> >> ArrayReader reader = new ArrayReader(recordDef);
> >> store = new Store(proxy, reader);
> >> store.load();
>
> >> gridPanel.reconfigure(store, columnModel);
>
> >> }
>
> >> below is my button code which get trigger when pressed. and it has
> >> listener that will call updategrid1()!!! please ignore those
> >> unnecessary parameter that are unused.
>
> >> ToolbarButton generateButton1 = new ToolbarButton("test", new
> >> ButtonListenerAdapter() {
> >> public void onClick(Button button,
> >> EventObject e) {
> >> updateGrid1(gridPanel,
> >> cols.getValue().intValue(),
> >> rows.getValue().intValue());
> >> }
> >> });
> >> generateButton1.setIconCls("database-add-icon");
> >> bottom.addButton(generateButton1);
>
> >> }
>
> >> can someone help!
>
> >> On Feb 6, 12:14 pm, ytbryan <[email protected]> wrote:
>
> >>> I just insert Window.alert("") into getdata1(); and i realised that
> >>> the method is called but no window alert appears. i inserted a
> >>> println after onsuccess and onfailure and something is printed out.
>
> >>> basically, onsuccess and onfailure are skipped? how is it possible?
>
> >>> On Feb 6, 11:58 am, ytbryan <[email protected]> wrote:
>
> >>>> below is the code where i execute the rpc request. i create
> >>>> getdata()
> >>>> and getdata1() to get execute different query. i am using two Async
> >>>> object to make call. i am not sure is it correct as i got error
> >>>> when
> >>>> i use one. any help/advice is welcome and appreciated. :D
>
> >>>> private void getData() {
>
> >>>> AsyncCallback<Object> callback = new AsyncCallback<Object>() {
> >>>> // fail
> >>>> public void onFailure(Throwable ex) {
> >>>> RootPanel.get().add(new HTML(ex.toString()));
> >>>> }
> >>>> // success
> >>>> public void onSuccess(Object result) {
> >>>> // Cast the result into the object that was sent
> >>>> // This casts the random object into DataContainer
> >>>> // Since the object is an array we use []
> >>>> DataContainer[] displayData = (DataContainer[]) result;
> >>>> }
> >>>> };
>
> >>>> callProvider.getData(callback);
> >>>> }
> >>>> private void getData1() {
> >>>> final int value1 = value;
>
> >>>> AsyncCallback<Object> callback1 = new
> >>>> AsyncCallback<Object>(){
> >>>> // fail
>
> >>>> public void onFailure(Throwable ex) {
> >>>> RootPanel.get().add(new HTML(ex.toString()));
>
> >>>> }
> >>>> // success
> >>>> public void onSuccess(Object result) {
> >>>> // Cast the result into the object that was sent
> >>>> // This casts the random object into DataContainer
> >>>> // Since the object is an array we use []
> >>>> displayData1 = (DataContainer[]) result;
>
> >>>> }
> >>>> };
>
> >>>> // remote procedure call to the server to get the data
> >>>> callProvider1.getData1(callback1);
>
> >>>> }
>
> >>>> On Feb 6, 11:46 am, mon3y <[email protected]> wrote:
>
> >>>>> Hi
>
> >>>>> A code snippet would be nice, so we can see where you're going
> >>>>> wrong.
>
> >>>>> Also put a Window.alert(""), in your onFailure and onSuccess of
> >>>>> your
> >>>>> second call to see what you get.
>
> >>>>> If it comes into the onFailure of your second call, there must be
> >>>>> something wrong with the way you're calling the server side or
> >>>>> your
> >>>>> interfaces.
>
> >>>>> If it comes in on your onSuccess, it must be a logic error, or
> >>>>> something else pertaining to your client side code.
>
> >>>>> If you make the first call successful and you call the second
> >>>>> one the
> >>>>> same way(logically) then there should be no issues.
>
> >>>>> :)
>
> >>>>> On Feb 6, 12:39 pm, ytbryan <[email protected]> wrote:
>
> >>>>>> Hi all,
> >>>>>> i know gwt don support synchronous call and i read it somwhere
> >>>>>> that
> >>>>>> there is actually don need to make rpc call synchronous.
>
> >>>>>> but i created an application with buttons like " save data"
> >>>>>> and "
> >>>>>> display result "that will communicate to server by fetching
> >>>>>> data or
> >>>>>> saving data.
>
> >>>>>> when the application starts, it will automatically display the
> >>>>>> first
> >>>>>> result with its first rpc call. but when i click the display
> >>>>>> second
> >>>>>> result's button....... it doesn't work anymore. any subsequent
> >>>>>> rpc
> >>>>>> call after the first one don't work.
>
> >>>>>> what is wrong here? and what am i missing? can someone advice
> >>>>>> me? the
> >>>>>> usual rpc example online only show how to make one rpc call. is
> >>>>>> there
> >>>>>> a way to make multiple calls that do different task? thank you
> >>>>>> for
> >>>>>> your time in viewing this post.
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