public override void Act(Queue <Message> messages)
{
while (messages.Count > 0 && running)
{
Message message = messages.Dequeue();
Console.WriteLine("\t[{1} -> {0}]: {2}", this.Name, message.Sender, message.Content);
FloorPlanMessage receivedMessage = JsonSerializer.Deserialize <FloorPlanMessage>(message.Content);
if (message.Sender == MonitorAgent.Monitor)
{
HandleMessageFromMonitor(receivedMessage);
}
else
{
HandleMessageFromPeer(receivedMessage, message);
}
blockList = blockList.Select(kvp => new KeyValuePair <int, int>(kvp.Key, kvp.Value - 1))
.Where(kvp => kvp.Value > 0)
.ToDictionary(
kvp => kvp.Key,
kvp => kvp.Value
);
// if (state == State.WaitingForPeerResponses)
// {
// --waitTurns;
// if (wa)
// }
}
}
public override void Act(Queue <Message> messages)
{
while (messages.Count > 0)
{
Message message = messages.Dequeue();
Console.WriteLine("\t[{1} -> {0}]: {2}", this.Name, message.Sender, message.Content);
FloorPlanMessage floorPlanMessage = JsonSerializer.Deserialize <FloorPlanMessage>(message.Content);
switch (floorPlanMessage.type)
{
case Start:
HandleStart(message.Sender, floorPlanMessage);
break;
case MessageType.Move:
HandleChangePosition(message.Sender, floorPlanMessage);
break;
default:
break;
}
guiForm.UpdatePlanetGUI();
}
}
private Point PickCandidate(FloorPlanMessage receivedMessageFromMonitor)
{
Point candidate = null;
if (state == State.MovingRandomly)
{
candidate = MoveRandomly();
}
else
{
if (receivedMessageFromMonitor.exitsInFieldOfViewPositions.Count > 0)
{
state = State.MovingTowardsExit;
candidate = MoveNear(Utils.closestPoint(receivedMessageFromMonitor.exitsInFieldOfViewPositions,
this.position));
}
else if (receivedMessageFromMonitor.agentsInFieldOfViewPositions.Count > 0)
{
receivedMessageFromMonitor.agentsInFieldOfViewPositions.ForEach(peerAgent =>
{
var peerQuestionMessage = new FloorPlanMessage(MessageType.PeerQuestion, peerAgent.Position);
if (!blockList.ContainsKey(peerAgent.Id) ||
(blockList.ContainsKey(peerAgent.Id) && blockList[peerAgent.Id] <= 0))
{
Send("Worker " + peerAgent.Id, JsonSerializer.Serialize(peerQuestionMessage));
}
});
// move in a direction until you get a response
// todo: our strategy might not be the best because then we have to handle inconsistencies by getting blocked by the monitor,
// but otherwise we need other stateful solution to let time pass (we focused on turns which are linked to messages received, but if we do not
// send message to monitor, we don't progress)
if (receivedMessageFromMonitor.type == MessageType.Block)
{
candidate = MoveInOtherDirection();
}
else
{
candidate = MoveInDirection();
}
state = State.WaitingForPeerResponses;
}
else
{
if (receivedMessageFromMonitor.type == MessageType.Block)
{
candidate = MoveInOtherDirection();
}
else
{
candidate = MoveInDirection();
}
}
}
return(candidate);
}
public override void Setup()
{
Console.WriteLine("Starting worker " + Id);
FloorPlanMessage positionMessage = new FloorPlanMessage();
positionMessage.type = MessageType.Start;
positionMessage.position = this.position;
Send(MonitorAgent.Monitor, JsonSerializer.Serialize(positionMessage));
}
private void HandleStart(string sender, FloorPlanMessage startMessage)
{
int senderId = Utils.ParsePeer(sender);
WorkerPositions.Add(senderId, startMessage.position);
numberOfPositionChanges[senderId] = 0;
FloorPlanMessage ackMessage = BuildFloorPlanMessage(MessageType.Acknowledge, WorkerPositions[senderId]);
Send(sender, JsonSerializer.Serialize(ackMessage));
}
private FloorPlanMessage BuildFloorPlanMessage(string type, Point position)
{
var planMessage = new FloorPlanMessage();
planMessage.type = type;
planMessage.position = position;
planMessage.exitsInFieldOfViewPositions = ExitPositions.Values
.Where(exitPosition => InFieldOfView(exitPosition, position))
.ToList();
planMessage.agentsInFieldOfViewPositions = WorkerPositions
.Where(agentKvp => InFieldOfView(agentKvp.Value, position) && !agentKvp.Value.Equals(position))
.Select(agentKvp => new AgentSummary(agentKvp.Key, agentKvp.Value))
.ToList();
return(planMessage);
}
private void HandleMessageFromPeer(FloorPlanMessage receivedMessage, Message message)
{
switch (receivedMessage.type)
{
case MessageType.PeerQuestion:
{
string messageType = lastReceivedMessageFromMonitor.exitsInFieldOfViewPositions.Count > 0
? MessageType.PeerAffirmative
: MessageType.PeerNegative;
// string messageType = PeerNegative;
FloorPlanMessage response =
new FloorPlanMessage(messageType, lastReceivedMessageFromMonitor.position);
Send(message.Sender, JsonSerializer.Serialize(response));
break;
}
case MessageType.PeerAffirmative:
{
// todo: following not working right, but deadlock cooldown
// is implemented by not asking that agent again for a number of turns
if (state == State.WaitingForPeerResponses)
{
state = State.FollowingOther;
var candidate = MoveNear(receivedMessage.position);
FloorPlanMessage changePositionMessage =
new FloorPlanMessage(MessageType.Move, candidate);
Send(MonitorAgent.Monitor, JsonSerializer.Serialize(changePositionMessage));
}
break;
}
case MessageType.PeerNegative:
{
blockList[Utils.ParsePeer(message.Sender)] = cooldownForTalking;
break;
}
default:
throw new NotImplementedException();
}
}
private void HandleMessageFromMonitor(FloorPlanMessage receivedMessage)
{
this.position = receivedMessage.position;
switch (receivedMessage.type)
{
case MessageType.Acknowledge:
{
var candidate = PickCandidate(receivedMessage);
FloorPlanMessage changePositionMessage = new FloorPlanMessage(MessageType.Move, candidate);
Send(MonitorAgent.Monitor, JsonSerializer.Serialize(changePositionMessage));
break;
}
case MessageType.Emergency:
{
state = State.MovingInConstantDirection;
var candidate = PickCandidate(receivedMessage);
FloorPlanMessage changePositionMessage = new FloorPlanMessage(MessageType.Move, candidate);
Send(MonitorAgent.Monitor, JsonSerializer.Serialize(changePositionMessage));
break;
}
case MessageType.Block:
{
Point candidate = PickCandidate(receivedMessage);
FloorPlanMessage changePositionMessage = new FloorPlanMessage(MessageType.Move, candidate);
Send(MonitorAgent.Monitor, JsonSerializer.Serialize(changePositionMessage));
break;
}
case Exit:
{
running = false;
break;
}
default:
throw new NotImplementedException();
}
lastReceivedMessageFromMonitor = receivedMessage;
}
private void HandleChangePosition(string sender, FloorPlanMessage receivedMessage)
{
int senderId = Utils.ParsePeer(sender);
// Block is handled regardless if in emergency or not
foreach (int workerId in WorkerPositions.Keys)
{
if (workerId == senderId)
{
continue;
}
if (WorkerPositions[workerId].Equals(receivedMessage.position))
{
var blockMessage = BuildFloorPlanMessage(MessageType.Block, WorkerPositions[senderId]);
Send(sender, JsonSerializer.Serialize(blockMessage));
return;
}
}
// todo: block if server is congested
if (WorkerPositions.ContainsKey(senderId) && Utils.Distance(WorkerPositions[senderId], receivedMessage.position) > 1)
{
var blockMessage = BuildFloorPlanMessage(MessageType.Block, WorkerPositions[senderId]);
Send(sender, JsonSerializer.Serialize(blockMessage));
return;
}
// Allow the requested move
if (!WorkerPositions.ContainsKey(senderId))
{
return;
}
else
{
WorkerPositions[senderId] = receivedMessage.position;
}
// Should declare emergency
if (++numberOfPositionChanges[senderId] == turnsUntilEmergency)
{
var emergencyMessage = BuildFloorPlanMessage(MessageType.Emergency, WorkerPositions[senderId]);
Send(sender, JsonSerializer.Serialize(emergencyMessage));
return;
}
// Exit if emergency is declared
if (isEmergencyDeclared(senderId) && ExitPositions.Values.Contains(WorkerPositions[senderId]))
{
var exitMessage = BuildFloorPlanMessage(MessageType.Exit, WorkerPositions[senderId]);
Send(sender, JsonSerializer.Serialize(exitMessage));
WorkerPositions.Remove(senderId);
this.Environment.Remove(sender);
if (WorkerPositions.Count == 0)
{
this.Stop();
}
return;
}
// Only thing remaining to do is acknowledge the move
var moveMessage = BuildFloorPlanMessage(MessageType.Acknowledge, WorkerPositions[senderId]);
Send(sender, JsonSerializer.Serialize(moveMessage));
}
