/// <summary>
/// Publishes a message.
/// </summary>
/// <param name="message">The message instance.</param>
public void Publish(object message)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
List <IEventAggregatorHandler> selectedHandlers;
lock (_handlers)
{
_handlers.RemoveAll(h => h.IsDead);
selectedHandlers = _handlers.FindAll(h => h.CanHandle(message));
}
if (selectedHandlers.Count == 0)
{
return;
}
var isUIThread = UIContext.CheckAccess();
var currentThreadHandlers = selectedHandlers
.Where(h => h.ThreadOption == ThreadOption.PublisherThread ||
isUIThread && h.ThreadOption == ThreadOption.UIThread);
foreach (var h in currentThreadHandlers)
{
h.Handle(message);
}
if (!isUIThread)
{
var uiThreadHandlers = selectedHandlers.FindAll(h => h.ThreadOption == ThreadOption.UIThread);
if (uiThreadHandlers.Count > 0)
{
UIContext.Run(() => { foreach (var h in uiThreadHandlers)
{
h.Handle(message);
}
}).ObserveException();
}
}
var backgroundThreadHandlers = selectedHandlers.FindAll(h => h.ThreadOption == ThreadOption.BackgroundThread);
if (backgroundThreadHandlers.Count > 0)
{
Task.Run(() => { foreach (var h in backgroundThreadHandlers)
{
h.Handle(message);
}
}).ObserveException();
}
}
public void RaiseCanExecuteChanged()
{
if (UIContext.CheckAccess())
{
_canExecuteChangedSource.Raise(this, EventArgs.Empty);
}
else
{
UIContext.Run(() => _canExecuteChangedSource.Raise(this, EventArgs.Empty)).ObserveException();
}
}
/// <summary>
/// Publishes a message.
/// </summary>
/// <param name="message">The message instance.</param>
public void Publish(object message)
{
if (message == null)
{
throw new ArgumentNullException(nameof(message));
}
List <IEventAggregatorHandler> selectedHandlers;
lock (_handlers)
{
_handlers.RemoveAll(h => h.IsDead);
selectedHandlers = _handlers.FindAll(h => h.CanHandle(message));
}
if (selectedHandlers.Count == 0)
{
return;
}
var isUIThread = UIContext.CheckAccess();
var currentThreadHandlers = selectedHandlers.FindAll(h => h.ThreadOption == ThreadOption.PublisherThread || isUIThread && h.ThreadOption == ThreadOption.UIThread);
if (currentThreadHandlers.Count > 0)
{
PublishCore(message, currentThreadHandlers);
}
if (!isUIThread)
{
var uiThreadHandlers = selectedHandlers.FindAll(h => h.ThreadOption == ThreadOption.UIThread);
if (uiThreadHandlers.Count > 0)
{
UIContext.BeginInvoke(() => PublishCore(message, uiThreadHandlers));
}
}
var backgroundThreadHandlers = selectedHandlers.FindAll(h => h.ThreadOption == ThreadOption.BackgroundThread);
if (backgroundThreadHandlers.Count > 0)
{
ThreadPool.Post(state => PublishCore(message, backgroundThreadHandlers), null);
}
}
