Using a Task is not a problem, but when you call back into the UI you need to
wrap it in a TaskAdapter. Tasks are executed on a background thread but all UI
calls need to happen on the main thread.
On May 7, 2011, at 1:07 PM, Edvin Syse wrote:
> If I pass --autologin=true to my app, there will be kicked off a Task with a
> TaskListener right away. Basically the flow is like this:
>
> 1. The application class loads a bxml file representing a Frame.
> 2. If --auto-login=true, call the login() method in the Frame
> 3. The login() method creates a task and a tasklistener, that would close the
> Frame and load another one on successful login.
>
> The first step is performed like this:
>
> LoginFrame loginFrame = (LoginFrame)
> serializer.readObject(VortexApplication.class, "LoginFrame.bxml");
> loginFrame.open(display, null);
>
> if ("true".equals(properties.get("autologin")))
> loginFrame.login();
>
> loginFrame.login() is basically:
>
> Task task = new Task() {
> ...
> }
>
> TaskListener loggedInListener = new TaskListener() {
> public void taskExecuted(Task task) {
> MainWindow mainWindow = (MainWindow)
> serializer.readObject(MainWindow.class, "MainWindow.bxml");
> mainWindow.open(display);
> close();
> ...
>
> Not a good idea? :)
>
> -- Edvin
>
>
>
> Den 07.05.2011 18:00, skrev Greg Brown:
>> Are you using background threads in your application by any chance?
>>
>> On May 7, 2011, at 9:41 AM, Edvin Syse wrote:
>>
>>> Once in a while I will get the following exception when I start my
>>> application. It appears maybe once every 30th start of the application.
>>> Since it is indeterministic I thought I'd post it here. I could create a
>>> test-case for this, but it could take some time to reproduce. Here goes:
>>>
>>> Exception in thread "AWT-EventQueue-0"
>>> java.util.ConcurrentModificationException
>>> at
>>> org.apache.pivot.collections.ArrayList$ArrayListItemIterator.hasNext(ArrayList.java:50)
>>> at
>>> org.apache.pivot.util.ImmutableIterator.hasNext(ImmutableIterator.java:37)
>>> at org.apache.pivot.wtk.skin.DisplaySkin.layout(DisplaySkin.java:49)
>>> at org.apache.pivot.wtk.Component.layout(Component.java:1951)
>>> at org.apache.pivot.wtk.Container.layout(Container.java:340)
>>> at org.apache.pivot.wtk.Component.validate(Component.java:1942)
>>> at
>>> org.apache.pivot.wtk.ApplicationContext$QueuedCallback.run(ApplicationContext.java:1488)
>>> at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
>>> at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641)
>>> at java.awt.EventQueue.access$000(EventQueue.java:84)
>>> at java.awt.EventQueue$1.run(EventQueue.java:602)
>>> at java.awt.EventQueue$1.run(EventQueue.java:600)
>>> at java.security.AccessController.doPrivileged(Native Method)
>>> at
>>> java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
>>> at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)
>>> at
>>> java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
>>> at
>>> java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
>>> at
>>> java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
>>> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
>>> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
>>> at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
>>>
>>> -- Edvin
>>
