/// <summary><see cref="TorXakisConnector.InputReceived"/></summary>
private void Connector_InputReceived(TorXakisAction action)
{
if (action.Type == ActionType.Input && action.Channel == TorXakisModel.InputChannel)
{
ModelAction input = ModelAction.Deserialize(action.Data);
HandleModelInput(input);
}
}
/// <summary>
/// Deserializes the given string into an object instance.
/// </summary>
public static ModelAction Deserialize(string str)
{
string[] parts = str.Split('(');
// Map the type name back to a class defined in the models assembly.
string typeName = parts[0];
Type type = null;
foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies())
{
if (assembly.FullName.StartsWith(ModelsAssemblyName))
{
type = assembly.GetType(ModelsAssemblyName + "." + typeName);
}
}
// Instantiate an object of this type.
ModelAction action = (ModelAction)Activator.CreateInstance(type);
// Assign the serialized property values on the new instance.
if (parts.Length > 1)
{
PropertyInfo[] properties = type.GetProperties(BindingFlags.Instance | BindingFlags.Public);
string[] values = parts[1].TrimEnd(')').Split(',');
for (int i = 0; i < properties.Length; i++)
{
PropertyInfo property = properties[i];
string value = values[i];
if (property.PropertyType == typeof(bool))
{
property.SetValue(action, bool.Parse(value));
}
else if (property.PropertyType == typeof(int))
{
property.SetValue(action, int.Parse(value));
}
else if (property.PropertyType == typeof(string))
{
property.SetValue(action, value);
}
}
}
return(action);
}
/// <summary>
/// Sends the given <see cref="ModelAction"/> output.
/// </summary>
public void SendModelOutput(ModelAction modelOutput)
{
lock (locker)
{
// Pre-filter incompatible types.
if (modelOutput is null)
{
throw new ArgumentNullException(nameof(modelOutput));
}
if (!ModelOutputs.Contains(modelOutput.GetType()))
{
return;
}
Log.Debug(this, nameof(SendModelOutput) + ": " + modelOutput);
string serialized = modelOutput.Serialize();
TorXakisAction output = TorXakisAction.FromOutput(TorXakisModel.OutputChannel, serialized);
Connector.SendOutput(output);
}
}
/// <summary>
/// Handles the given <see cref="ModelAction"/> input.
/// </summary>
public void HandleModelInput(ModelAction modelInput)
{
lock (locker)
{
// Pre-filter incompatible types.
if (modelInput is null)
{
throw new ArgumentNullException(nameof(modelInput));
}
if (!ModelInputs.Contains(modelInput.GetType()))
{
return;
}
Log.Debug(this, nameof(HandleModelInput) + ": " + modelInput);
inputs.Enqueue(modelInput);
// This must now be called manually from the thread that should perform the operations.
//CheckSystems();
}
}
/// <summary>
/// Checks the <see cref="inputs"/> and <see cref="events"/> queues.
/// Determines if the <see cref="CurrentSystem"/> can be advanced.
/// Determines if one of the <see cref="Systems"/> can be started.
/// </summary>
public void CheckSystems()
{
Log.Debug(this, nameof(CheckSystems) + " inputs: " + inputs.Count + " commands: " + events.Count + "\n" + this);
bool transitioned = false;
// If proactive transitions are possible, trigger them!
if (!transitioned)
{
HashSet <Tuple <TransitionSystem, ProactiveTransition> > proactives = PossibleProactiveTransitions();
if (proactives.Count > 0)
{
Log.Debug(this, "Possible proactive transitions: " + string.Join(", ", proactives.Select(x => x.Item1.ModelAction.Name + ": " + x.Item2).ToArray()));
Tuple <TransitionSystem, ProactiveTransition> selected = proactives.Random();
Log.Debug(this, "Selected proactive transition: " + selected.Item1.ModelAction.Name + ": " + selected.Item2);
IAction generated = ExecuteProactiveTransition(selected);
if (generated is ModelAction modelOutput)
{
SendModelOutput(modelOutput);
}
else if (generated is ISystemAction systemCommand)
{
SendSystemCommand(systemCommand);
}
transitioned = true;
}
}
// If reactive transitions are possible, due to system events, trigger them!
if (!transitioned)
{
if (events.Count > 0)
{
ISystemAction systemEvent = events.Dequeue();
Log.Debug(this, "Dequeueing system event: " + systemEvent);
HashSet <Tuple <TransitionSystem, ReactiveTransition> > reactives = PossibleReactiveTransitions(systemEvent);
if (reactives.Count > 0)
{
Log.Debug(this, "Possible reactive transitions: " + string.Join(", ", reactives.Select(x => x.Item1.ModelAction.Name + ": " + x.Item2).ToArray()));
Tuple <TransitionSystem, ReactiveTransition> selected = reactives.Random();
Log.Debug(this, "Selected reactive transition: " + selected.Item1.ModelAction.Name + ": " + selected.Item2);
ExecuteReactiveTransition(systemEvent, selected);
transitioned = true;
}
else
{
// Since all system events are being looped through this, not being able to handle one is not an error per se. (TPE)
Log.Warn(this, "No reactive transition possible for system event: " + systemEvent);
}
}
}
// If reactive transitions are possible, due to model inputs, trigger them!
if (!transitioned)
{
if (inputs.Count > 0)
{
ModelAction modelInput = inputs.Dequeue();
Log.Debug(this, "Dequeueing model input: " + modelInput);
HashSet <Tuple <TransitionSystem, ReactiveTransition> > reactives = PossibleReactiveTransitions(modelInput);
if (reactives.Count > 0)
{
Log.Debug(this, "Possible reactive transitions: " + string.Join(", ", reactives.Select(x => x.Item1.ModelAction.Name + ": " + x.Item2).ToArray()));
Tuple <TransitionSystem, ReactiveTransition> selected = reactives.Random();
Log.Debug(this, "Selected reactive transition: " + selected.Item1.ModelAction.Name + ": " + selected.Item2);
ExecuteReactiveTransition(modelInput, selected);
transitioned = true;
}
else
{
Log.Error(this, "No reactive transition possible for model input: " + modelInput);
}
}
}
// If a transition was taken, re-evaluate immediately!
if (transitioned)
{
if (CurrentSystem.CurrentState == CurrentSystem.InitialState)
{
Log.Debug(this, "System has looped: " + CurrentSystem);
CurrentSystem = null;
}
CheckSystems();
}
// If no transition was taken (due to ignored input or event), we still need to check the next input or event.
else if (inputs.Count > 0 || events.Count > 0)
{
CheckSystems();
}
}