public ModeService(ServiceCreationInfo info)
: base("mode", info)
{
mCurrentMode = new Mode("<none>");
mChangeQueue = new List<ModeChange>();
mQueueEvent = new AsyncEvent();
Task.Run(async () =>
{
while (true)
{
// Retry once we have something in the queue.
if (mChangeQueue.Count == 0)
{
await mQueueEvent.Wait();
continue;
}
ModeChange change;
var delay = TimeSpan.Zero;
lock (mChangeQueue)
{
change = mChangeQueue[0];
delay = change.ActivationTime - DateTime.Now;
mQueueEvent.Reset();
if (delay <= TimeSpan.Zero)
mChangeQueue.RemoveAt(0);
}
if (delay > TimeSpan.Zero)
{
using (var delayTokenSource = new CancellationTokenSource())
{
var tasks = new Task[] { mQueueEvent.Wait(), Task.Delay(delay, delayTokenSource.Token) };
await Task.WhenAny(tasks);
}
continue;
}
CurrentMode = change.Mode;
}
});
}
private void ChangeMode(Mode mode)
{
if (mCurrentMode == mode)
{
Log.Debug("Already in mode: {0}", mode.Name);
return;
}
Log.Debug("Changing mode, old: {0}, new: {1}", mCurrentMode.Name, mode.Name);
Mode oldMode = mCurrentMode;
mCurrentMode = mode;
if (OnModeChange != null)
OnModeChange(this, new ModeEvent(mCurrentMode, oldMode));
}
public ModeChange(Mode mode, DateTime activationTime)
{
this.Mode = mode;
this.ActivationTime = activationTime;
}
public void QueueChange(Mode mode, int seconds)
{
Log.Debug("Queuing mode: {0}, timeout: {1}", mode.Name, seconds);
var activationTime = DateTime.Now + new TimeSpan(0, 0, seconds);
lock (mChangeQueue)
{
mChangeQueue.Add(new ModeChange(mode, activationTime));
mChangeQueue.OrderBy(x => x.ActivationTime);
mQueueEvent.Set();
}
}
