WorkspaceHandlerExtension
From OpenKM Documentation
Any extension that implements WorkspaceHandlerExtension will be watching all events fired from workspace tab panel.
Method
onChange(WorkspaceEventConstant event)
Each time it'll be some new tab panel event the method onChange it'll be fired by OpenKM
Example
public class HandlersTest implements WorkspaceHandlerExtension {
@Override
public void onChange(WorkspaceEventConstant event) {
Window.alert("workspace event fired");
}
}