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

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

Driver.cs

Source:Driver.cs

...62            this.SendEvent(this.FailureDetector, new RegisterClient(this.Id));63            this.RaiseGotoStateEvent<InjectFailures>();64        }65        [OnEntry(nameof(InjectFailuresOnEntry))]66        [OnEventDoAction(typeof(FailureDetector.NodeFailed), nameof(NodeFailedAction))]67        private class InjectFailures : State { }68        /// <summary>69        /// Injects failures (modelled with the special Coyote event 'halt').70        /// </summary>71        private void InjectFailuresOnEntry()72        {73            foreach (var node in this.Nodes)74            {75                this.SendEvent(node, HaltEvent.Instance);76            }77        }78        /// <summary>79        /// Notify liveness monitor of node failure.80        /// </summary>81        private void NodeFailedAction(Event e)82        {83            this.Monitor<Liveness>(e);84        }85    }86}...

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 Microsoft.Coyote;3using Microsoft.Coyote.Samples.Monitors;4using Microsoft.Coyote.Tasks;5{6    {7        static void Main(string[] args)8        {9            Run();10            Console.ReadLine();11        }12        static async void Run()13        {14            var fd = new FailureDetector(1000, 2, 2);15            fd.NodeFailed += (sender, e) =>16            {17                Console.WriteLine("Node {0} failed", e.NodeId);18            };19            await Task.Run(() => fd.Start());20            await Task.Delay(5000);21            await Task.Run(() => fd.Stop());22        }23    }24}25using System;26using System.Threading.Tasks;27using Microsoft.Coyote;28using Microsoft.Coyote.Samples.Monitors;29using Microsoft.Coyote.Tasks;30{31    {32        static void Main(string[] args)33        {34            Run();35            Console.ReadLine();36        }37        static async void Run()38        {39            var fd = new FailureDetector(1000, 2, 2);40            fd.NodeFailed += (sender, e) =>41            {42                Console.WriteLine("Node {0} failed", e.NodeId);43            };44            await Task.Run(() => fd.Start());45            await Task.Delay(5000);46            await Task.Run(() => fd.Stop());47        }48    }49}50using System;51using System.Threading.Tasks;52using Microsoft.Coyote;53using Microsoft.Coyote.Samples.Monitors;54using Microsoft.Coyote.Tasks;55{56    {57        static void Main(string[] args)58        {59            Run();60            Console.ReadLine();61        }62        static async void Run()63        {64            var fd = new FailureDetector(1000, 2, 2);65            fd.NodeFailed += (sender, e) =>66            {67                Console.WriteLine("Node {0} failed", e.NodeId);68            };69            await Task.Run(() => fd.Start());70            await Task.Delay(5000);71            await Task.Run(() => fd.Stop());72        }73    }74}

NodeFailed

Using AI Code Generation

1using Microsoft.Coyote;2using Microsoft.Coyote.Samples.Monitors;3using Microsoft.Coyote.Tasks;4using System;5using System.Threading.Tasks;6{7    {8        static async Task Main(string[] args)9        {10            var config = Configuration.Create();11            config.MaxSchedulingSteps = 10000;12            config.SchedulingIterations = 1000;13            config.SchedulingSeed = 0;14            config.SchedulingStrategy = SchedulingStrategy.DFS;15            config.Verbose = 3;16            config.EnableCycleDetection = true;17            config.EnableDataRaceDetection = true;18            config.EnableHotStateDetection = true;19            config.EnableOperationInterleavings = true;20            config.EnablePhasePartitioning = true;21            config.EnableRandomExecution = true;22            config.EnableStateGraph = true;23            config.EnableStateSnapshotting = true;24            config.EnableTestingIterations = true;25            config.EnableUnfairnessDetection = true;26            config.EnableWaitOperations = true;27            config.EnableWorkStealing = true;28            config.EnableWorkStealingPerformance = true;29            config.EnableWorkStealingStatistics = true;30            config.EnableWorkStealingVisualization = true;31            config.MaxFairSchedulingSteps = 10000;32            config.MaxUnfairSchedulingSteps = 10000;33            config.RandomSchedulingSeed = 0;34            config.SchedulingIterations = 1000;35            config.SchedulingStrategy = SchedulingStrategy.DFS;36            config.SchedulingTrace = SchedulingTrace.Full;37            config.TestingIterations = 1000;38            config.ThrowOnFailure = true;39            config.ThrowOnHotState = true;40            config.ThrowOnOperationInterleavings = true;41            config.ThrowOnUnfairness = true;42            config.ThrowOnWaitOperations = true;43            await RunAsync(config);44        }45        static async Task RunAsync(Configuration config)46        {47            var monitor = new FailureDetector();48            config.RegisterMonitor(monitor);49            await RunAsync(config, monitor);50        }51        static async Task RunAsync(Configuration config, FailureDetector monitor)52        {53            var task = Task.Run(async () =>54            {55                while (true)56                {57                    await Task.Delay(500);58                    monitor.NodeFailed();59                }60            });61            await Task.Run(async () =>62            {63                while (true)64                {65                    await Task.Delay(1000);66                    monitor.NodeRecovered();67                }68            });

NodeFailed

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            var fd = new FailureDetector();9            fd.NodeFailed += (sender, e) => Console.WriteLine($"Node {e.NodeId} failed");10            await fd.StartAsync();11        }12    }13}

NodeFailed

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Samples.Monitors;6{7    {8        private readonly MonitorId FailureDetector;9        protected override Task OnInitializeAsync(Event initialEvent)10        {11            this.FailureDetector = this.Monitor<FailureDetector>();12            this.SendEvent(this.FailureDetector, new Monitor.NotifyOnFailureEvent(this.Id));13            return Task.CompletedTask;14        }15        protected override Task OnEventAsync(Event e)16        {17            switch (e)18            {19                    this.Monitor<FailureDetector>(new Monitor.NotifyOnFailureEvent(nfe.Node));20                    break;21                    Console.WriteLine($"Node {nfe.Node.Name} failed!");22                    break;23                    Console.WriteLine("Node1 received event E");24                    break;25                    return Task.CompletedTask;26            }27            return Task.CompletedTask;28        }29    }30    {31        private readonly MonitorId FailureDetector;32        protected override Task OnInitializeAsync(Event initialEvent)33        {34            this.FailureDetector = this.Monitor<FailureDetector>();35            this.SendEvent(this.FailureDetector, new Monitor.NotifyOnFailureEvent(this.Id));36            return Task.CompletedTask;37        }38        protected override Task OnEventAsync(Event e)39        {40            switch (e)41            {42                    this.Monitor<FailureDetector>(new Monitor.NotifyOnFailureEvent(nfe.Node));43                    break;44                    Console.WriteLine($"Node {nfe.Node.Name} failed!");45                    break;46                    Console.WriteLine("Node2 received event E");47                    break;48                    return Task.CompletedTask;49            }50            return Task.CompletedTask;51        }52    }53    {54        private readonly MonitorId FailureDetector;55        protected override Task OnInitializeAsync(Event initialEvent)56        {57            this.FailureDetector = this.Monitor<FailureDetector>();58            this.SendEvent(this.FailureDetector, new Monitor.NotifyOnFailureEvent(this.Id));59            return Task.CompletedTask;60        }61        protected override Task OnEventAsync(Event e)62        {63            switch (e)64            {

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        static async Task Main(string[] args)10        {11            using (var runtime = RuntimeFactory.Create())12            {13                var monitor = runtime.CreateActor(typeof(FailureDetector));14                var node = runtime.CreateActor(typeof(Node));15                runtime.SendEvent(monitor, new RegisterNodeEvent(node));16                await Task.Delay(10000);17                runtime.SendEvent(monitor, new UnregisterNodeEvent(node));18                await Task.Delay(10000);19                runtime.SendEvent(monitor, new RegisterNodeEvent(node));20                await Task.Delay(10000);21                runtime.SendEvent(node, new Halt());22            }23        }24    }25    {26        private int state = 0;27        protected override Task OnInitializeAsync(Event initialEvent)28        {29            this.RegisterMonitor<FailureDetector>();30            return Task.CompletedTask;31        }32        protected override Task OnEventAsync(Event e)33        {34            if (e is Halt)35            {36                this.RaiseHaltEvent();37            }38            else if (e is Ping)39            {40                this.SendEvent((e as Ping).Sender, new Pong());41            }42            else if (e is Pong)43            {44                this.state++;45            }46            return Task.CompletedTask;47        }48    }49    {50        public ActorId Sender;51        public Ping(ActorId sender)52        {53            this.Sender = sender;54        }

NodeFailed

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6{7    {8        static void Main(string[] args)9        {10            var fd = new FailureDetector();11            fd.NodeFailed += (sender, e) => Console.WriteLine("Node {0} failed", e.Node);12            fd.Start();13            Console.ReadLine();14        }15    }16}17using System;18using System.Collections.Generic;19using System.Linq;20using System.Text;21using System.Threading.Tasks;22{23    {24        static void Main(string[] args)25        {26            var fd = new FailureDetector();27            fd.NodeFailed += (sender, e) => Console.WriteLine("Node {0} failed", e.Node);28            fd.Start();29            Console.ReadLine();30        }31    }32}33using System;34using System.Collections.Generic;35using System.Linq;36using System.Text;37using System.Threading.Tasks;38{39    {40        static void Main(string[] args)41        {42            var fd = new FailureDetector();43            fd.NodeFailed += (sender, e) => Console.WriteLine("Node {0} failed", e.Node);44            fd.Start();45            Console.ReadLine();46        }47    }48}49using System;50using System.Collections.Generic;51using System.Linq;52using System.Text;53using System.Threading.Tasks;54{55    {56        static void Main(string[] args)57        {58            var fd = new FailureDetector();59            fd.NodeFailed += (sender, e) => Console.WriteLine

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;7using Microsoft.Coyote.Tasks;8{9    {10        private int Id;11        private List<int> Neighbors;12        private List<int> Suspected;13        private List<int> Failed;14        private ActorId Detector;15        private Random Rand;16        private int NumMessages = 0;17        private int NumSuspected = 0;18        private int NumFailed = 0;19        private int NumReceived = 0;20        private async Task OnStart(StartEvent e)21        {22            this.Id = e.Id;23            this.Neighbors = e.Neighbors;24            this.Suspected = new List<int>();25            this.Failed = new List<int>();26            this.Rand = new Random();27            this.Detector = await this.CreateActorAsync(typeof(FailureDetector));28            await this.SendEventAsync(this.Detector, new InitializeEvent(this.Id, this.Neighbors));29        }30        private async Task OnPing(PingEvent e)31        {32            this.NumMessages++;33            if (!this.Suspected.Contains(e.Id) && !this.Failed.Contains(e.Id))34            {35                this.NumReceived++;36                await this.SendEventAsync(this.Detector, new ReceiveEvent(this.Id, e.Id));37                await this.SendEventAsync(this.RandomNeighbor(), new PingEvent(this.Id));38            }39        }40        private async Task OnNodeFailed(NodeFailedEvent e)41        {42            this.NumSuspected++;43            this.Suspected.Add(e.Id);44            await this.SendEventAsync(this.RandomNeighbor(), new PingEvent(this.Id));45        }46        private async Task OnNodeRecovered(NodeRecoveredEvent e)47        {48            this.NumFailed++;49            this.Suspected.Remove(e.Id);50            this.Failed.Add(e.Id);51        }52        private async Task OnPrint(PrintEvent e)53        {54            Console.WriteLine("Node {0} sent {1} messages, received {2} messages, suspected {3} nodes, and failed {4} nodes", this.Id, this.NumMessages, this.NumReceived, this.NumSuspected, this.NumFailed);55            this.Stop();56        }57        private ActorId RandomNeighbor()58        {

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