public static Task <bool> GracefulStop(this IActorRef target, TimeSpan timeout, object stopMessage)
{
var internalTarget = target.AsInstanceOf <IInternalActorRef>();
var promiseRef = PromiseActorRef.Apply(internalTarget.Provider, timeout, target, stopMessage.GetType().Name);
internalTarget.SendSystemMessage(new Watch(internalTarget, promiseRef));
target.Tell(stopMessage, ActorRefs.NoSender);
return(promiseRef.Result.ContinueWith(t =>
{
var returnResult = false;
PatternMatch.Match(t.Result)
.With <Terminated>(terminated =>
{
returnResult = (terminated.ActorRef.Path.Equals(target.Path));
})
.Default(m =>
{
returnResult = false;
});
internalTarget.SendSystemMessage(new Unwatch(internalTarget, promiseRef));
return returnResult;
}, TaskContinuationOptions.ExecuteSynchronously));
}
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <ListenerMessage>(l => Listeners.ListenerReceive(l))
.With <string>(s =>
{
if (s.Equals("foo"))
{
Listeners.Gossip("bar");
}
});
}
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <RegisterTransportActor>(r =>
{
/*
* TODO: need to add support for RemoteDispatcher here.
* See https://github.com/akka/akka/blob/master/akka-remote/src/main/scala/akka/remote/RemoteSettings.scala#L42
* and https://github.com/akka/akka/blob/master/akka-remote/src/main/scala/akka/remote/Remoting.scala#L95
*/
Sender.Tell(Context.ActorOf(r.Props.WithDeploy(Deploy.Local), r.Name));
});
}
/// <summary>
/// By default, <see cref="Failure"/> is logged at error level and other
/// reason types are not logged. It is possible to override this behavior.
/// </summary>
/// <param name="reason"></param>
protected virtual void LogTermination(Reason reason)
{
PatternMatch.Match(reason)
.With <Failure>(f =>
{
if (f.Cause is Exception)
{
_log.Error(f.Cause.AsInstanceOf <Exception>(), "terminating due to Failure");
}
else
{
_log.Error(f.Cause.ToString());
}
});
}
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <string>(str =>
{
if (str.Equals("bar"))
{
_barCount.GetAndIncrement();
_barLatch.CountDown();
}
if (str.Equals("foo"))
{
_fooLatch.CountDown();
}
});
}
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <InitializeLogger>(m => Sender.Tell(new LoggerInitialized()))
.With <Error>(m =>
Trace.TraceError(m.ToString()))
.With <Warning>(m => Trace.TraceWarning(m.ToString()))
.With <DeadLetter>(m => Trace.TraceWarning(string.Format("Deadletter - unable to send message {0} from {1} to {2}", m.Message, m.Sender, m.Sender), typeof(DeadLetter).ToString()))
.With <UnhandledMessage>(m => Trace.TraceWarning(string.Format("Unhandled message!"), typeof(UnhandledMessage).ToString()))
.Default(m =>
{
if (m != null)
{
Trace.TraceInformation(m.ToString());
}
});
}
public static Task <bool> GracefulStop(this ActorRef target, TimeSpan timeout, object stopMessage)
{
var internalTarget = target.AsInstanceOf <InternalActorRef>();
if (internalTarget.IsTerminated)
{
return(Task.Run(() => true));
}
var provider = Futures.ResolveProvider(target);
var promise = new TaskCompletionSource <object>();
//set up the timeout
var cancellationSource = new CancellationTokenSource();
cancellationSource.Token.Register(() => promise.TrySetCanceled());
cancellationSource.CancelAfter(timeout);
//create a new tempcontainer path
var path = provider.TempPath();
//callback to unregister from tempcontainer
Action unregister = () => provider.UnregisterTempActor(path);
var fref = new FutureActorRef(promise, ActorRef.NoSender, unregister, path);
internalTarget.Tell(new Watch(internalTarget, fref));
target.Tell(stopMessage, ActorRef.NoSender);
return(promise.Task.ContinueWith(t =>
{
var returnResult = false;
PatternMatch.Match(t.Result)
.With <Terminated>(terminated =>
{
returnResult = (terminated.ActorRef.Path.Equals(target.Path));
})
.Default(m =>
{
returnResult = false;
});
internalTarget.Tell(new Unwatch(target, fref));
return returnResult;
}, TaskContinuationOptions.ExecuteSynchronously | TaskContinuationOptions.AttachedToParent));
}
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <InitializeLogger>(m =>
{
var bus = m.LoggingBus;
bus.Subscribe(this.Self, typeof(SetTarget));
bus.Subscribe(this.Self, typeof(UnhandledMessage));
Sender.Tell(new LoggerInitialized());
})
.With <SetTarget>(m =>
{
dst = m.Ref;
dst.Tell("OK");
})
.With <LogEvent>(m => dst.Tell(m))
.With <UnhandledMessage>(m => dst.Tell(m));
}
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <Spawn>(m =>
{
Context.ActorOf(Props.Create(() => new KillableActor(testActor)), m.Name);
testActor.Tell(Tuple.Create("Created", m.Name));
})
.With <ContextStop>(m =>
{
var child = Context.Child(m.Name);
Context.Stop(child);
})
.With <Stop>(m =>
{
var child = Context.Child(m.Name);
child.Stop();
})
.With <Count>(m =>
testActor.Tell(Context.GetChildren().Count()));
}
public void EggsInBasket()
{
var eggs = 2;
var basket = PatternMatch.Match()
.With(() => eggs == 0, "No eggs")
.With(() => eggs == 1, "One egg")
.With(() => eggs > 1, string.Format("{0} eggs", eggs))
.Else("Invalid number of eggs");
var twoEggs = basket.Do();
eggs = 0;
var zeroEggs = basket.Do();
eggs = int.MinValue;
var invalidEggs = basket.Do();
twoEggs.ShouldBe("2 eggs");
zeroEggs.ShouldBe("No eggs");
invalidEggs.ShouldBe("Invalid number of eggs");
}
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <ListenUnderlying>(listen =>
{
localAddress = listen.ListenAddress;
listen.UpstreamListener.ContinueWith(
listenerRegistered => Self.Tell(new ListenerRegistered(listenerRegistered.Result)),
TaskContinuationOptions.AttachedToParent);
})
.With <ListenerRegistered>(listener =>
{
associationListener = listener.Listener;
foreach (var dEvent in DelayedEvents)
{
Self.Tell(dEvent, ActorRef.NoSender);
}
DelayedEvents = new Queue <object>();
Context.Become(Ready);
})
.Default(m => DelayedEvents.Enqueue(m));
}
public void FirstLettersOfThings()
{
var processName = PatternMatch.Match <string, string>()
.With(x => x.StartsWith("A"), "Starts with A")
.With(x => x.StartsWith("B"), "Starts with B")
.With(x => x.StartsWith("C"), "Starts with C")
.With(x => x.StartsWith("D"), "Starts with D")
.With(x => x.StartsWith("E"), "Starts with E")
.With(x => x.StartsWith("F"), x => string.Format("{0} starts with F", x))
.Else("Unknown")
.ToFunc();
var alfred = processName("Alfred");
var fiona = processName("Fiona");
var ben = processName("Ben");
var xerces = processName("Xerces");
alfred.ShouldBe("Starts with A");
fiona.ShouldBe("Fiona starts with F");
ben.ShouldBe("Starts with B");
xerces.ShouldBe("Unknown");
}
/// <summary>
/// Main actor receive method
/// </summary>
/// <param name="message"></param>
protected override bool Receive(object message)
{
var match = PatternMatch.Match(message)
.With <TimeoutMarker>(marker =>
{
if (_generation == marker.Generation)
{
ProcessMsg(new StateTimeout(), "state timeout");
}
})
.With <Timer>(t =>
{
if (_timers.ContainsKey(t.Name) && _timers[t.Name].Generation == t.Generation)
{
if (_timeoutFuture != null)
{
_timeoutFuture.Cancel(false);
_timeoutFuture = null;
}
_generation++;
if (!t.Repeat)
{
_timers.Remove(t.Name);
}
ProcessMsg(t.Message, t);
}
})
.With <SubscribeTransitionCallBack>(cb =>
{
Context.Watch(cb.ActorRef);
Listeners.Add(cb.ActorRef);
//send the current state back as a reference point
cb.ActorRef.Tell(new CurrentState <TState>(Self, _currentState.StateName));
})
.With <Listen>(l =>
{
Context.Watch(l.Listener);
Listeners.Add(l.Listener);
l.Listener.Tell(new CurrentState <TState>(Self, _currentState.StateName));
})
.With <UnsubscribeTransitionCallBack>(ucb =>
{
Context.Unwatch(ucb.ActorRef);
Listeners.Remove(ucb.ActorRef);
})
.With <Deafen>(d =>
{
Context.Unwatch(d.Listener);
Listeners.Remove(d.Listener);
})
.With <InternalActivateFsmLogging>(_ => { DebugEvent = true; })
.Default(msg =>
{
if (_timeoutFuture != null)
{
_timeoutFuture.Cancel(false);
_timeoutFuture = null;
}
_generation++;
ProcessMsg(msg, Sender);
});
return(match.WasHandled);
}
/// <summary>
/// Main actor receive method
/// </summary>
/// <param name="message"></param>
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <TimeoutMarker>(marker =>
{
if (generation == marker.Generation)
{
ProcessMsg(new StateTimeout(), "state timeout");
}
})
.With <Timer>(t =>
{
if (timers.ContainsKey(t.Name) && timers[t.Name].Generation == t.Generation)
{
if (timeoutFuture != null)
{
timeoutFuture.Cancel(false);
timeoutFuture = null;
}
generation++;
if (!t.Repeat)
{
timers.Remove(t.Name);
}
ProcessMsg(t.Message, t);
}
})
.With <SubscribeTransitionCallBack>(cb =>
{
Context.Watch(cb.ActorRef);
Listeners.Add(cb.ActorRef);
//send the current state back as a reference point
cb.ActorRef.Tell(new CurrentState <TS>(Self, currentState.StateName));
})
.With <Listen>(l =>
{
Context.Watch(l.Listener);
Listeners.Add(l.Listener);
l.Listener.Tell(new CurrentState <TS>(Self, currentState.StateName));
})
.With <UnsubscribeTransitionCallBack>(ucb =>
{
Context.Unwatch(ucb.ActorRef);
Listeners.Remove(ucb.ActorRef);
})
.With <Deafen>(d =>
{
Context.Unwatch(d.Listener);
Listeners.Remove(d.Listener);
})
.With <Terminated>(t => Listeners.Remove(t.ActorRef))
.Default(msg =>
{
if (timeoutFuture != null)
{
timeoutFuture.Cancel(false);
timeoutFuture = null;
}
generation++;
ProcessMsg(msg, Sender);
});
}
protected override bool Receive(object message)
{
PatternMatch.Match(message)
.With <Get>(get =>
{
if (_messages.Count == 0)
{
EnqueueQuery(get);
}
else
{
Sender.Tell(_messages.Dequeue());
}
})
.With <Select>(select =>
{
if (_messages.Count == 0)
{
EnqueueQuery(select);
}
else
{
_currentSelect = select;
var firstMatch = _messages.DequeueFirstOrDefault(MessagePredicate);
if (firstMatch == null)
{
EnqueueQuery(select);
}
else
{
Sender.Tell(firstMatch);
}
_currentSelect = null;
}
})
.With <StartWatch>(sw => Context.Watch(sw.Target))
.With <Kick>(() =>
{
var now = DateTime.Now;
var overdue = _clientsByTimeout.TakeWhile(q => q.Deadline < now);
foreach (var query in overdue)
{
query.Client.Tell(new Status.Failure(new TimeoutException("Deadline passed")));
}
_clients.RemoveAll(q => q.Deadline < now);
var afterDeadline = _clientsByTimeout.Where(q => q.Deadline >= now).ToList();
_clientsByTimeout.IntersectWith(afterDeadline);
}).Default(msg =>
{
if (_clients.Count == 0)
{
EnqueueMessage(msg);
}
else
{
_currentMessage = msg;
var firstMatch = _clients.DequeueFirstOrDefault(ClientPredicate); //TODO: this should work as DequeueFirstOrDefault
if (firstMatch != null)
{
_clientsByTimeout.ExceptWith(new[] { firstMatch });
firstMatch.Client.Tell(msg);
}
else
{
EnqueueMessage(msg);
}
_currentMessage = null;
}
});
if (_clients.Count == 0)
{
if (_currentDeadline != null)
{
_currentDeadline.Item2.Cancel();
_currentDeadline = null;
}
}
else
{
var next = _clientsByTimeout.FirstOrDefault();
if (next != null)
{
if (_currentDeadline != null)
{
_currentDeadline.Item2.Cancel();
}
var cancellationTokenSource = new CancellationTokenSource();
Context.System.Scheduler.ScheduleOnce(next.Deadline - DateTime.Now, Self, new Kick(),
cancellationTokenSource.Token);
_currentDeadline = Tuple.Create(next.Deadline, cancellationTokenSource);
}
}
return(true);
}
protected override void OnReceive(object message)
{
PatternMatch.Match(message)
.With <Tuple <TestLatch, TimeSpan> >(t => t.Item1.Ready(t.Item2));
}
protected void SendSystemMessage(SystemMessage message, ActorRef sender)
{
PatternMatch.Match(message)
.With <Terminate>(t => Stop())
.With <DeathWatchNotification>(d => Tell(new Terminated(d.Actor, d.ExistenceConfirmed, d.AddressTerminated)));
}