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How to use NodeFailed method of Microsoft.Coyote.Samples.Monitors.NodeFailed class

Best Coyote code snippet using Microsoft.Coyote.Samples.Monitors.NodeFailed.NodeFailed

FailureDetector.cs

Source:FailureDetector.cs

...17            {18                this.Nodes = nodes;19            }20        }21        internal class NodeFailed : Event22        {23            public ActorId Node;24            public NodeFailed(ActorId node)25            {26                this.Node = node;27            }28        }29        private class TimerCancelled : Event { }30        private class RoundDone : Event { }31        private class Unit : Event { }32        /// <summary>33        /// Nodes to be monitored.34        /// </summary>35        private HashSet<ActorId> Nodes;36        /// <summary>37        /// Set of registered clients.38        /// </summary>39        private HashSet<ActorId> Clients;40        /// <summary>41        /// Number of made 'Ping' attempts.42        /// </summary>43        private int Attempts;44        /// <summary>45        /// Set of alive nodes.46        /// </summary>47        private HashSet<ActorId> Alive;48        /// <summary>49        /// Collected responses in one round.50        /// </summary>51        private HashSet<ActorId> Responses;52        /// <summary>53        /// Reference to the timer machine.54        /// </summary>55        private ActorId Timer;56        [Start]57        [OnEntry(nameof(InitOnEntry))]58        [OnEventDoAction(typeof(Driver.RegisterClient), nameof(RegisterClientAction))]59        [OnEventDoAction(typeof(Driver.UnregisterClient), nameof(UnregisterClientAction))]60        [OnEventPushState(typeof(Unit), typeof(SendPing))]61        private class Init : State { }62        private void InitOnEntry(Event e)63        {64            var nodes = (e as Config).Nodes;65            this.Nodes = new HashSet<ActorId>(nodes);66            this.Clients = new HashSet<ActorId>();67            this.Alive = new HashSet<ActorId>();68            this.Responses = new HashSet<ActorId>();69            // Initializes the alive set to contain all available nodes.70            foreach (var node in this.Nodes)71            {72                this.Alive.Add(node);73            }74            // Initializes the timer.75            this.Timer = this.CreateActor(typeof(Timer), new Timer.Config(this.Id));76            // Transitions to the 'SendPing' state after everything has initialized.77            this.RaiseEvent(new Unit());78        }79        private void RegisterClientAction(Event e)80        {81            var client = (e as Driver.RegisterClient).Client;82            this.Clients.Add(client);83        }84        private void UnregisterClientAction(Event e)85        {86            var client = (e as Driver.UnregisterClient).Client;87            if (this.Clients.Contains(client))88            {89                this.Clients.Remove(client);90            }91        }92        [OnEntry(nameof(SendPingOnEntry))]93        [OnEventGotoState(typeof(RoundDone), typeof(Reset))]94        [OnEventPushState(typeof(TimerCancelled), typeof(WaitForCancelResponse))]95        [OnEventDoAction(typeof(Node.Pong), nameof(PongAction))]96        [OnEventDoAction(typeof(Timer.TimeoutEvent), nameof(TimeoutAction))]97        private class SendPing : State { }98        private void SendPingOnEntry()99        {100            foreach (var node in this.Nodes)101            {102                // Sends a 'Ping' event to any machine that has not responded.103                if (this.Alive.Contains(node) && !this.Responses.Contains(node))104                {105                    this.Monitor<Safety>(new Safety.Ping(node));106                    this.SendEvent(node, new Node.Ping(this.Id));107                }108            }109            // Starts the timer with a given timeout value. Note that in this sample,110            // the timeout value is not actually used, because the timer is abstracted111            // away using Coyote to enable systematic testing (i.e. timeouts are triggered112            // nondeterministically). In production, this model timer machine will be113            // replaced by a real timer.114            this.SendEvent(this.Timer, new Timer.StartTimerEvent(100));115        }116        /// <summary>117        /// This action is triggered whenever a node replies with a 'Pong' event.118        /// </summary>119        private void PongAction(Event e)120        {121            var node = (e as Node.Pong).Node;122            if (this.Alive.Contains(node))123            {124                this.Responses.Add(node);125                // Checks if the status of alive nodes has changed.126                if (this.Responses.Count == this.Alive.Count)127                {128                    this.SendEvent(this.Timer, new Timer.CancelTimerEvent());129                    this.RaiseEvent(new TimerCancelled());130                }131            }132        }133        private void TimeoutAction()134        {135            // One attempt is done for this round.136            this.Attempts++;137            // Each round has a maximum number of 2 attempts.138            if (this.Responses.Count < this.Alive.Count && this.Attempts < 2)139            {140                // Retry by looping back to same state.141                this.RaiseGotoStateEvent<SendPing>();142                return;143            }144            foreach (var node in this.Nodes)145            {146                if (this.Alive.Contains(node) && !this.Responses.Contains(node))147                {148                    this.Alive.Remove(node);149                    // Send failure notification to any clients.150                    foreach (var client in this.Clients)151                    {152                        this.SendEvent(client, new NodeFailed(node));153                    }154                }155            }156            this.RaiseEvent(new RoundDone());157        }158        [OnEventDoAction(typeof(Timer.CancelSuccess), nameof(CancelSuccessAction))]159        [OnEventDoAction(typeof(Timer.CancelFailure), nameof(CancelFailure))]160        [DeferEvents(typeof(Timer.TimeoutEvent), typeof(Node.Pong))]161        private class WaitForCancelResponse : State { }162        private void CancelSuccessAction()163        {164            this.RaiseEvent(new RoundDone());165        }166        private void CancelFailure()...

Liveness.cs

Source:Liveness.cs

...15    /// This monitor is itself a special type of state machine and it starts in the state 'Init'16    /// and transitions to the state 'Wait' upon receiving the event 'RegisterNodes', which contains17    /// references to all nodes in the program.18    ///19    /// Whenever the 'Driver' machine receives a 'NodeFailed' event from the 'FailureDetector'20    /// machine, it forwards that event to the this monitor which then removes the machine whose21    /// failure was detected from the set of nodes.22    ///23    /// The monitor exits the 'Hot' 'Init' state only when all nodes becomes empty, i.e., when24    /// the failure of all node machines has been detected. Thus, this monitor expresses the25    /// specification that failure of every node machine must be eventually detected.26    ///27    /// Read our documentation (https://microsoft.github.io/coyote/)28    /// to learn more about liveness checking in Coyote.29    /// </summary>30    internal class Liveness : Monitor31    {32        internal class RegisterNodes : Event33        {34            public HashSet<ActorId> Nodes;35            public RegisterNodes(HashSet<ActorId> nodes)36            {37                this.Nodes = nodes;38            }39        }40        private HashSet<ActorId> Nodes;41        [Start]42        [OnEventDoAction(typeof(RegisterNodes), nameof(RegisterNodesAction))]43        private class Init : State { }44        private void RegisterNodesAction(Event e)45        {46            var nodes = (e as RegisterNodes).Nodes;47            this.Nodes = new HashSet<ActorId>(nodes);48            this.RaiseGotoStateEvent<Wait>();49        }50        /// <summary>51        /// A hot state denotes that the liveness property is not52        /// currently satisfied.53        /// </summary>54        [Hot]55        [OnEventDoAction(typeof(FailureDetector.NodeFailed), nameof(NodeDownAction))]56        private class Wait : State { }57        private void NodeDownAction(Event e)58        {59            var node = (e as FailureDetector.NodeFailed).Node;60            this.Nodes.Remove(node);61            if (this.Nodes.Count == 0)62            {63                // When the liveness property has been satisfied64                // transition out of the hot state.65                this.RaiseGotoStateEvent<Done>();66            }67        }68        private class Done : State { }69    }70}...

NodeFailed

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Samples.Monitors;6using Microsoft.Coyote.Tasks;7{8    {9        public static void Main(string[] args)10        {11            using (var r = RuntimeFactory.Create())12            {13                var node = r.CreateActor(typeof(Node));14                r.RegisterMonitor<NodeFailed>(node);15                r.SendEvent(node, new Start());16                r.Wait();17            }18        }19    }20    public class Start : Event { }21    {22        private ActorId Client;23        [OnEventDoAction(typeof(Start), nameof(Init))]24        private class InitState : State { }25        private void Init()26        {27            this.Client = this.CreateActor(typeof(Client));28            this.SendEvent(this.Client, new Start());29        }30    }31    public class Start : Event { }32    {33        private ActorId Node;34        [OnEventDoAction(typeof(Start), nameof(Init))]35        private class InitState : State { }36        private void Init()37        {38            this.Node = this.CreateActor(typeof(Node));39            this.SendEvent(this.Node, new Start());40        }41    }42}43using System;44using System.Threading.Tasks;45using Microsoft.Coyote;46using Microsoft.Coyote.Actors;47using Microsoft.Coyote.Samples.Monitors;48using Microsoft.Coyote.Tasks;49{50    {51        public static void Main(string[] args)52        {53            using (

NodeFailed

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Samples.Monitors;5using Microsoft.Coyote.Actors;6using Microsoft.Coyote.Tasks;7{8    {9        private static async Task Main(string[] args)10        {11            var configuration = Configuration.Create().WithMonitor<NodeFailed>();12            using (var runtime = RuntimeFactory.Create(configuration))13            {14                var monitor = runtime.CreateActor(typeof(Monitor));15                var node = runtime.CreateActor(typeof(Node));16                runtime.SendEvent(node, new NodeFailed());17                await Task.Delay(1000);18            }19        }20    }21    {22        protected override Task OnInitializeAsync(Event initialEvent)23        {24            this.RaiseEvent(new NodeFailed());25            return Task.CompletedTask;26        }27    }28    {29        protected override Task OnEventAsync(Event e)30        {31            if (e is NodeFailed)32            {33                Console.WriteLine("Node failed.");34            }35            return Task.CompletedTask;36        }37    }38    {39    }40}

NodeFailed

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote.Actors;4using Microsoft.Coyote.Specifications;5using Microsoft.Coyote.Samples.Monitors;6{7    {8        public static async Task Main(string[] args)9        {10            ActorRuntime runtime = RuntimeFactory.Create();11            NodeFailed nodeMonitor = new NodeFailed();12            runtime.RegisterMonitor(nodeMonitor);13            ActorId a = runtime.CreateActor(typeof(A));14            runtime.SendEvent(a, new e1());15            await Task.Delay(1000);16            runtime.SendEvent(a, new e1());17            await Task.Delay(1000);18            runtime.SendEvent(a, new e1());19            await Task.Delay(1000);20        }21    }22    {23        [OnEventDoAction(typeof(e1), nameof(Handle_e1))]24        private class Init : State { }25        private void Handle_e1()26        {27            Assert.IsTrue(this.ReceivedEventCount < 3, "Received more than two e1 events");28        }29    }30    class e1 : Event { }31}32using System;33using System.Threading.Tasks;34using Microsoft.Coyote.Actors;35using Microsoft.Coyote.Specifications;36using Microsoft.Coyote.Samples.Monitors;37{38    {39        public static async Task Main(string[] args)40        {41            ActorRuntime runtime = RuntimeFactory.Create();42            NodeFailed nodeMonitor = new NodeFailed();

NodeFailed

Using AI Code Generation

1using Microsoft.Coyote.Actors;2using Microsoft.Coyote.Samples.Monitors;3using System;4using System.Threading.Tasks;5{6    {7        public static async Task Main(string[] args)8        {9            var runtime = RuntimeFactory.Create();10            var config = Configuration.Create();11            config.EnableMonitors = true;12            config.EnableActorLogging = true;13            config.EnableActorTracing = true;14            config.EnableActorStateLogging = true;15            config.EnableActorStateTracing = true;16            config.EnableActorStateMonitoring = true;

NodeFailed

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using Microsoft.Coyote;7using Microsoft.Coyote.Actors;8using Microsoft.Coyote.Samples.Monitors;9using Microsoft.Coyote.Specifications;10using Microsoft.Coyote.Tasks;11{12    {13        static void Main(string[] args)14        {15            var config = Configuration.Create();16            config.MaxSchedulingSteps = 1000;17            config.EnableCycleDetection = true;18            config.EnableDataRaceDetection = true;19            config.EnableDeadlockDetection = true;20            config.EnableIntegerOverflowDetection = true;21            config.EnableOperationCanceledExceptionSupport = true;22            config.EnableObjectDisposedExceptionSupport = true;23            config.EnableTimerCancellation = true;24            config.EnableActorGarbageCollection = true;25            config.EnableActorLogging = true;26            config.EnableActorMonitoring = true;27            config.EnableStateGraph = true;28            config.EnableStateGraphScheduling = true;29            config.EnableStateGraphSchedulingWithFairMachines = true;30            config.EnableActorStateExploration = true;

NodeFailed

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Threading.Tasks;4using Microsoft.Coyote;5using Microsoft.Coyote.Actors;6using Microsoft.Coyote.Samples.Monitors;7{8    {9        private readonly List<ActorId> _nodes;10        private readonly ActorId _monitor;11        private readonly ActorId _logger;12        private readonly int _id;13        private ActorId _successor;14        private ActorId _predecessor;15        private int _idSpace;16        private int _successorSpace;17        private int _predecessorSpace;18        public Node(List<ActorId> nodes, ActorId monitor, ActorId logger, int id)19        {20            this._nodes = nodes;21            this._monitor = monitor;22            this._logger = logger;23            this._id = id;24            this._idSpace = id;25            this._successorSpace = id;26            this._predecessorSpace = id;27        }28        [OnEntry(nameof(OnInit))]29        private class Init : State { }30        private void OnInit()31        {32            this._successor = this._nodes[(this._id + 1) % this._nodes.Count];33            this._predecessor = this._nodes[(this._id - 1 + this._nodes.Count) % this._nodes.Count];34            this.SendEvent(this._monitor, new NodeFailed(this._successor));35            this.SendEvent(this._monitor, new NodeFailed(this._predecessor));36            this.RaiseEvent(new FindSuccessor(this._idSpace));37        }38        [OnEventDoAction(typeof(FindSuccessor), nameof(OnFindSuccessor))]39        private class Searching : State { }40        private void OnFindSuccessor(Event e)41        {42            var evt = e as FindSuccessor;43            this.Assert(evt != null, "Event must be of type FindSuccessor.");44            if (evt.Id < this._idSpace || evt.Id > this._successorSpace)45            {46                this.SendEvent(this._successor, new FindSuccessor(evt.Id));47            }48            {49                this.SendEvent(this._logger, new Log($"Node {this._id} found successor {

NodeFailed

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Threading.Tasks;4using Microsoft.Coyote;5using Microsoft.Coyote.Actors;6using Microsoft.Coyote.Samples.Monitors;7{8    {9        private static async Task Main(string[] args)10        {11            var config = Configuration.Create().WithMonitor<NodeFailed>();12            using (var runtime = RuntimeFactory.Create(config))13            {14                var cluster = new List<ActorId>();15                for (int i = 0; i < 10; i++)16                {17                    cluster.Add(runtime.CreateActor(typeof(Node)));18                }

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