Salut Etienne,
I suppose that your posting is related to the JIRA issue 6974
(https://www.canoo.com/jira/browse/UBA-6974) that you have created right
after sending your posting to the developer list. From the trace that
you have attached to the JIRA issue I can see that the second to last
round-trip contains the following requests:
1. ULCListSelectionModel.stateUpdate(null)
2. ULCComboBoxModelAdapter.stateUpdate(11)
3. ULCTableColumnModel.stateUpdate(1504, 1506, 1505, 1507, 1508)
4. ULCComboBox.actionPerformed()
The error happens because of UBA-910
(https://www.canoo.com/jira/browse/UBA-910): the state update of the
combo box may trigger an action event before the state update of the
table column has been executed. Therefore the table column model gets in
an inconsistent state. This finally results in an error when ULC tries
to fetch the renderer components from the inconsistent table column
model in the last round-trip.
This issue has been fixed for ULC 6.1. For ULC 6.0.4 you can try the
patch at the end of my mail.
[ Show ยป <https://www.canoo.com/jira/browse/UBA-6974> ]
Daniel Grob
<https://www.canoo.com/jira/secure/ViewProfile.jspa?name=daniel>
[08/Aug/06 02:40 PM] The reason for the error is that the combo box
wrongly triggers an event during state update, i.e. the event is handled
by the application before all client-side state is synchronized to the
server-side. Actually there is stateUpdate for the table column model
after the combo box's action event. Therefore the table column model
gets in an inconsistent state. This finally results in an error when ULC
tries to fetch the renderer components from the inconsisten table column
model in the next server rount trip.
Griessli Dany
import com.ulcjava.base.application.AbstractApplication;
import com.ulcjava.base.application.ULCBorderLayoutPane;
import com.ulcjava.base.application.ULCComboBox;
import com.ulcjava.base.application.ULCFrame;
import com.ulcjava.base.application.ULCLabel;
import com.ulcjava.base.application.ULCTextField;
import com.ulcjava.base.application.event.ActionEvent;
import com.ulcjava.base.application.event.IActionListener;
import com.ulcjava.base.application.event.UlcEvent;
import com.ulcjava.base.development.DevelopmentRunner;
import com.ulcjava.base.shared.IUlcEventConstants;
import com.ulcjava.base.shared.internal.Anything;
import com.ulcjava.base.shared.internal.ThrowableUtilities;
public class PR910 extends AbstractApplication {
public void start() {
// replace ULCPatchedComboBox with ULCComboBox to see error!
ULCLabel descriptionLabel = new ULCLabel(
"<html><ol>"
+ "<li>Enter text into text field</li>"
+ "<li>Select another item in combo box</li>"
+ "<li>Look at console output: in the action
listener the text field is still empty</li>"
+ "</ol></html>");
final ULCTextField textField = new ULCTextField();
final ULCComboBox comboBox = new ULCPatchedComboBox(new String[] {
"one", "two", "three" });
comboBox.addActionListener(new IActionListener() {
public void actionPerformed(ActionEvent event) {
Object selectedItem = comboBox.getSelectedItem();
System.out.println("selectedItem = " + selectedItem);
String text = textField.getText();
System.out.println("text = " + text);
}
});
ULCFrame frame = new ULCFrame("PR910");
frame.setDefaultCloseOperation(ULCFrame.TERMINATE_ON_CLOSE);
frame.getContentPane().add(descriptionLabel,
ULCBorderLayoutPane.NORTH);
frame.getContentPane().add(textField, ULCBorderLayoutPane.CENTER);
frame.getContentPane().add(comboBox, ULCBorderLayoutPane.SOUTH);
frame.setVisible(true);
}
public static void main(String[] args) {
DevelopmentRunner.setApplicationClass(PR910.class);
DevelopmentRunner.main(args);
}
private static class ULCPatchedComboBox extends ULCComboBox {
public ULCPatchedComboBox(Object[] items) {
super(items);
}
protected void distributeToListeners(UlcEvent event) {
// we ignore events that are triggered by state updates in
// ULCComboBoxModelAdapter
String stackTrace = ThrowableUtilities.toString(new
Throwable());
if
(stackTrace.indexOf("ULCComboBoxModelAdapter.handleRequest") >= 0) {
return;
}
super.distributeToListeners(event);
}
protected void handleEvent(int listenerType, int eventId,
Anything args) {
// To prevent double events the original ULCComboBox filters
// events triggered by the combo box if a previous state update
// in the model adapter has already trigger that event...
if (listenerType == IUlcEventConstants.ACTION_EVENT) {
int modifiers = args.asInt(0);
distributeToListeners(new ActionEvent(this,
getActionCommand(),
modifiers));
} else {
super.handleEvent(listenerType, eventId, args);
}
}
}
}
Etienne Studer wrote:
Hi
Could you please decipher the stacktrace below, especially the frames
in the ULCTable. Thanks!
Regards, Etienne
3 03.08.2006 11:50:14.916 1,000 SEVERE
Thread[ULC Communication Controller Thread,6,main]
com.ulcjava.base.server.ULCSession processRequests got
exception while processing
[java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.ArrayList.get(ArrayList.java:326)
at
com.ulcjava.base.application.AbstractColumnModel.getAbstractColumn(AbstractColumnModel.java:38)
at
com.ulcjava.base.application.table.ULCTableColumnModel.getColumn(ULCTableColumnModel.java:3)
at com.ulcjava.base.application.ULCTable.d(ULCTable.java:190)
at com.ulcjava.base.application.ULCTable.a(ULCTable.java:69)
at com.ulcjava.base.application.ULCTable.a(ULCTable.java:354)
at
com.ulcjava.base.application.ULCTable.handleRequest(ULCTable.java:156)
at
com.navis.framework.ulc.server.application.view.table.ULCMetafieldTable.handleRequest(ULCMetafieldTable.java:103)
at com.ulcjava.base.server.ULCSession.a(ULCSession.java:11)
at
com.ulcjava.base.server.ULCSession.processRequests(ULCSession.java:134)
at
com.ulcjava.base.development.DevelopmentContainerAdapter.processRequests(DevelopmentContainerAdapter.java:2)
at
com.ulcjava.base.development.DevelopmentConnector.sendRequests(DevelopmentConnector.java:0)
at
com.ulcjava.base.client.UISession$k_.run(UISession$k_.java:28)
at java.lang.Thread.run(Thread.java:534)
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