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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