public void Receive(SystemMessage message)
{
if (message.ChannelName == SystemMessaging.CHANNEL)
{
SystemMessaging.MessageType messageType = (SystemMessaging.MessageType)message.MessageType;
ISystemStateService sss = ServiceRegistration.Get <ISystemStateService>();
if (messageType == SystemMessaging.MessageType.SystemStateChanged)
{
if (sss.CurrentState == SystemState.ShuttingDown || sss.CurrentState == SystemState.Ending)
{
// It is necessary to block the main thread until our message delivery thread has delivered all pending
// messages to avoid asynchronous threads during the shutdown phase.
// It's a bit illegal to call the Shutdown() method which acquires a lock in this synchronous message
// handler method. But as we know that the SystemStateChanged message is only called by our application
// main thread which doesn't hold locks, this won't cause deadlocks.
// How ugly, but that's life.
_owner.Shutdown();
}
}
}
}