Update Eclipse menu radio state from code - eclipse

Question

In the command handler for a radio state menu item, I prompt the user if they want to continue. If they choose no, I need to reset the selected menu item back to the previous value.
I am using HandlerUtil.updateRadioState(event.getCommand(), oldScope) but the menu stays with the new value.
Any suggestions?
Command Handler
#Override
public Object execute(ExecutionEvent event) throws ExecutionException {
if (HandlerUtil.matchesRadioState(event))
return null;
String scope = event.getParameter(RadioState.PARAMETER_ID);
if (MessageDialog.openConfirm(HandlerUtil.getActiveShell(event), "Confirm restart",
"Switching source of Motors requires a restart. Continue?")) {
int connection = MotorDbPreferencesPage.DATABASE_ACCESS_LOCAL;
if ("Cloud".compareToIgnoreCase(scope) == 0) {
connection = MotorDbPreferencesPage.DATABASE_ACCESS_CLOUD;
}
Activator.getDefault().getPreferenceStore().setValue(MotorDbPreferencesPage.DATABASE_ACCESS, connection);
PlatformUI.getWorkbench().restart();
} else {
String oldScope = "Local";
// switch it back to the way it was before the user selected it
if ("Local".compareToIgnoreCase(scope) == 0) {
oldScope = "Cloud";
}
HandlerUtil.updateRadioState(event.getCommand(), oldScope);
}
return null;
}
Command definition in plugin.xml
<command
id="com.client.eclipse.connection"
name="Connection">
<commandParameter
id="org.eclipse.ui.commands.radioStateParameter"
name="State"
optional="false">
</commandParameter>
<state
class="org.eclipse.ui.handlers.RadioState:Cloud"
id="org.eclipse.ui.commands.radioState">
</state>
</command>
And the menu definition from plugin.xml
<menu
label="Connection">
<command
commandId="com.client.eclipse.connection"
label="Local"
style="radio">
<parameter
name="org.eclipse.ui.commands.radioStateParameter"
value="Local">
</parameter>
</command>
<command
commandId="com.client.eclipse.connection"
label="Cloud"
style="radio">
<parameter
name="org.eclipse.ui.commands.radioStateParameter"
value="Cloud">
</parameter>
</command>
</menu>

Answer 1

It's your responsability to call
HandlerUtil.updateRadioState(event.getCommand(), scope);
to make the GUI displays the new state. Without calling it, the radio state won't change.
It means that in the case of user is aborting, don't call this method at all.