public static void BackgroundAction(object target, Action backgroundAction, Action befoe, Action callback, EndMode endMode, TaskImplMode taskMode)
{
var context = new BackgroundActionContext(endMode, () => { backgroundAction(); return(null); });
var container = target == null?backgroundAction.Target.As <IExtendedPresenter>() : target.As <IExtendedPresenter>();
var task = container.GetMetadata <IBackgroundThreadTask>();
if (task == null)
{
task = TaskImplFactory.CreateTask(taskMode);
if (taskMode != TaskImplMode.UIThread)
{
container.WasShutdown += (s, e) => task.Dispose();
container.AddMetadata(task);
}
}
//Before
if (!befoe.IsNull())
{
befoe();
}
//Action
task.Enqueue(context);
//After
if (!callback.IsNull())
{
Application.Current.Dispatcher.BeginInvoke(callback, DispatcherPriority.ContextIdle);
}
}
/// <summary>
/// Executes the specified this action on the specified target.
/// </summary>
/// <param name="actionMessage">The action message.</param>
/// <param name="handlingNode">The node.</param>
/// <param name="context">The context.</param>
public override void Execute(ActionMessage actionMessage, IInteractionNode handlingNode, object context)
{
try
{
TryUpdateTrigger(actionMessage, handlingNode, true);
var parameters = _messageBinder.DetermineParameters(
actionMessage,
_requirements,
handlingNode,
context
);
var beforeProcessors = _filters.PreProcessors.OfType <IBeforeProcessor>();
foreach (var filter in _filters.PreProcessors.Except(beforeProcessors.Cast <IPreProcessor>()))
{
if (!filter.Execute(actionMessage, handlingNode, parameters))
{
return;
}
}
//Before
foreach (var before in beforeProcessors.OrderByDescending(p => p.Priority))
{
if (!before.BeforeExecute(actionMessage, handlingNode, parameters))
{
return;
}
}
CurrentBackgroundActionInfo = _filters.PostProcessors.OfType <IBackgroundActionInfo>().Single();
var container = handlingNode.MessageHandler.Unwrap() as IExtendedPresenter;
CurrentBackgroundTask = container.GetMetadata <IBackgroundThreadTask>();
if (CurrentBackgroundTask == null)
{
CurrentBackgroundTask = TaskImplFactory.CreateTask(CurrentBackgroundActionInfo.TaskMode);
container.WasShutdown += (s, e) => CurrentBackgroundTask.Dispose();
container.AddMetadata(CurrentBackgroundTask);
AttachTaskEvents(actionMessage, handlingNode, parameters);
}
//Exectue Before method
if (CurrentBackgroundActionInfo.BeforeMethod != null)
{
var result = CurrentBackgroundActionInfo.BeforeMethod.Invoke(container, parameters);
bool canProceed = true;
if (CurrentBackgroundActionInfo.BeforeMethod.Info.ReturnType == typeof(bool))
{
canProceed = result.As <bool>();
}
if (!canProceed)
{
return;
}
}
DoExecute(actionMessage, handlingNode, parameters);
}
catch (Exception ex)
{
TryUpdateTrigger(actionMessage, handlingNode, false);
if (!TryApplyRescue(actionMessage, handlingNode, ex))
{
throw;
}
OnCompleted();
}
}
