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How to use FailureDetector class of Microsoft.Coyote.Samples.Monitors package

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

Driver.cs

Source:Driver.cs

...39            {40                this.Client = client;41            }42        }43        private ActorId FailureDetector;44        private HashSet<ActorId> Nodes;45        private int NumOfNodes;46        [Start]47        [OnEntry(nameof(InitOnEntry))]48        private class Init : State { }49        private void InitOnEntry(Event e)50        {51            this.NumOfNodes = (e as Config).NumOfNodes;52            // Initializes the nodes.53            this.Nodes = new HashSet<ActorId>();54            for (int i = 0; i < this.NumOfNodes; i++)55            {56                var node = this.CreateActor(typeof(Node));57                this.Nodes.Add(node);58            }59            // Notifies the liveness monitor that the nodes are initialized.60            this.Monitor<Liveness>(new Liveness.RegisterNodes(this.Nodes));61            this.FailureDetector = this.CreateActor(typeof(FailureDetector), new FailureDetector.Config(this.Nodes));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>...

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}...

FailureDetector

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        public static void Main(string[] args)10        {11            var runtime = RuntimeFactory.Create();12            var client = runtime.CreateActor(typeof(Client));13            runtime.SendEvent(client, new Client.Start());14            runtime.Wait(client);15        }16    }17    {18        private MonitorId failureDetector;19        [OnEventDoAction(typeof(Start), nameof(StartClient))]20        [OnEventDoAction(typeof(FailureDetector.TimeoutEvent), nameof(HandleTimeout))]21        private class Init : State { }22        private void StartClient(Event e)23        {24            this.failureDetector = this.Monitor(typeof(FailureDetector), new FailureDetector.Configuration(5, 100));25            this.Monitor(this.failureDetector, new FailureDetector.Start());26            this.SendEvent(this.Id, new Halt(), 500);27        }28        private void HandleTimeout(Event e)29        {30            this.Monitor(this.failureDetector, new FailureDetector.Ping());31            this.SendEvent(this.Id, new Halt(), 500);32        }33    }34    internal class Start : Event { }35    internal class Halt : Event { }36}37using System;38using System.Collections.Generic;39using System.Threading.Tasks;40using Microsoft.Coyote;41using Microsoft.Coyote.Actors;42using Microsoft.Coyote.Samples.Monitors;43{44    {

FailureDetector

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 detector = new FailureDetector();9            detector.Start();10            await Task.Delay(1000);11            detector.Stop();12        }13    }14}15using Microsoft.Coyote.Samples.Monitors;16using System;17using System.Threading.Tasks;18{19    {20        static async Task Main(string[] args)21        {22            var detector = new FailureDetector();23            detector.Start();24            await Task.Delay(1000);25            detector.Stop();26        }27    }28}29using Microsoft.Coyote.Samples.Monitors;30using System;31using System.Threading.Tasks;32{33    {34        static async Task Main(string[] args)35        {36            var detector = new FailureDetector();37            detector.Start();38            await Task.Delay(1000);39            detector.Stop();40        }41    }42}43using Microsoft.Coyote.Samples.Monitors;44using System;45using System.Threading.Tasks;46{47    {48        static async Task Main(string[] args)49        {50            var detector = new FailureDetector();51            detector.Start();52            await Task.Delay(1000);53            detector.Stop();54        }55    }56}57using Microsoft.Coyote.Samples.Monitors;58using System;59using System.Threading.Tasks;60{61    {62        static async Task Main(string[] args)63        {64            var detector = new FailureDetector();65            detector.Start();66            await Task.Delay(1000);67            detector.Stop();68        }69    }70}71using Microsoft.Coyote.Samples.Monitors;72using System;73using System.Threading.Tasks;

FailureDetector

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2using Microsoft.Coyote.Samples.Monitors.Monitors;3{4    {5        private static void Main(string[] args)6        {7            var monitor = new FailureDetector();8            var runtime = RuntimeFactory.Create();9            runtime.RegisterMonitor(monitor);10            runtime.Start();11            var machine = new MyMachine();12            runtime.CreateMachine(machine);13            runtime.Run();14        }15    }16    {17        [OnEntry(nameof(InitOnEntry))]18        [OnEventGotoState(typeof(UnitEvent), typeof(Active))]19        private class Init : MachineState { }20        private void InitOnEntry()21        {22            this.Send(this.Id, new UnitEvent());23        }24        [OnEventDoAction(typeof(UnitEvent), nameof(ActiveAction))]25        private class Active : MachineState { }26        private void ActiveAction()27        {28            this.Send(this.Id, new UnitEvent());29        }30        protected override void OnHalt()31        {32            this.Runtime.Stop();33        }34    }35}36using Microsoft.Coyote.Samples.Monitors;37using Microsoft.Coyote.Samples.Monitors.Monitors;38{39    {40        private static void Main(string[] args)41        {42            var monitor = new FailureDetector();43            var runtime = RuntimeFactory.Create();44            runtime.RegisterMonitor(monitor);45            runtime.Start();46            var machine = new MyMachine();47            runtime.CreateMachine(machine);48            runtime.Run();49        }50    }51    {

FailureDetector

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2using System;3{4    {5        static void Main(string[] args)6        {7            var fd = new FailureDetector();8            fd.Start();9            Console.ReadLine();10        }11    }12}13using Microsoft.Coyote.Samples.Monitors;14using System;15using System.Collections.Generic;16using System.Threading;17{18    {19        private List<Thread> threads = new List<Thread>();20        private int numNodes = 5;21        public void Start()22        {23            for (int i = 0; i < numNodes; i++)24            {25                var t = new Thread(NodeThread);26                t.Start(i);27                threads.Add(t);28            }29        }30        private void NodeThread(object obj)31        {32            var nodeId = (int)obj;33            var fd = new FailureDetector();34            fd.Start();35            while (true)36            {37                if (fd.IsFailed(nodeId))38                {39                    Console.WriteLine("Node {0} is failed", nodeId);40                }41            }42        }43    }44}

FailureDetector

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        static async Task Main(string[] args)9        {10            using (var runtime = RuntimeFactory.Create())11            {12                runtime.RegisterMonitor(typeof(FailureDetector));13                await runtime.CreateActor(typeof(MyActor));14                Console.WriteLine("Press any key to exit...");15                Console.ReadKey();16            }17        }18    }19    {20        [OnEventDoAction(typeof(UnitEvent), nameof(Start))]21        private class Init : State { }22        private async Task Start()23        {24            this.SendEvent(this.Id, new UnitEvent(), 5000);25            await this.ReceiveEventAsync(typeof(UnitEvent));26            Console.WriteLine("Received test event.");27        }28    }29}30using System;31using System.Threading.Tasks;32using Microsoft.Coyote;33using Microsoft.Coyote.Actors;34using Microsoft.Coyote.Samples.Monitors;35{36    {37        static async Task Main(string[] args)38        {39            using (var runtime = RuntimeFactory.Create())40            {41                runtime.RegisterMonitor(typeof(FailureDetector));42                await runtime.CreateActor(typeof(MyActor));43                Console.WriteLine("Press any key to exit...");44                Console.ReadKey();45            }46        }47    }48    {49        [OnEventDoAction(typeof(UnitEvent), nameof(Start))]50        private class Init : State { }51        private async Task Start()52        {53            this.SendEvent(this.Id, new UnitEvent(), 5000);54            await this.ReceiveEventAsync(typeof(UnitEvent));55            Console.WriteLine("Received test event.");56        }57    }58}

FailureDetector

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2using System;3{4    {5        static void Main(string[] args)6        {7            var fd = new FailureDetector();8            fd.Start();9            fd.Stop();10            Console.ReadLine();11        }12    }13}14using Microsoft.Coyote.Samples.Monitors;15using System;16{17    {18        static void Main(string[] args)19        {20            var fd = new FailureDetector();21            fd.Start();22            fd.Stop();23            Console.ReadLine();24        }25    }26}27using Microsoft.Coyote.Samples.Monitors;28using System;29{30    {31        static void Main(string[] args)32        {33            var fd = new FailureDetector();34            fd.Start();35            fd.Stop();36            Console.ReadLine();37        }38    }39}40using Microsoft.Coyote.Samples.Monitors;41using System;42{43    {44        static void Main(string[] args)45        {46            var fd = new FailureDetector();47            fd.Start();48            fd.Stop();49            Console.ReadLine();50        }51    }52}53using Microsoft.Coyote.Samples.Monitors;54using System;55{56    {57        static void Main(string[] args)58        {59            var fd = new FailureDetector();60            fd.Start();61            fd.Stop();62            Console.ReadLine();63        }64    }65}66using Microsoft.Coyote.Samples.Monitors;67using System;68{69    {70        static void Main(string[] args)71        {72            var fd = new FailureDetector();73            fd.Start();74            fd.Stop();75            Console.ReadLine();76        }77    }78}

FailureDetector

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2using Microsoft.Coyote;3using System;4using System.Threading.Tasks;5{6    {7        static async Task Main(string[] args)8        {9            var detector = new FailureDetector();10            detector.Start();11            await Task.Delay(5000);12            detector.Stop();13            await Task.Delay(5000);14        }15    }16}17using Microsoft.Coyote.Samples.Monitors;18using Microsoft.Coyote;19using System;20using System.Threading.Tasks;21{22    {23        static async Task Main(string[] args)24        {25            var detector = new FailureDetector();26            detector.Start();27            await Task.Delay(5000);28            detector.Stop();29            await Task.Delay(5000);30        }31    }32}33using Microsoft.Coyote.Samples.Monitors;34using Microsoft.Coyote;35using System;36using System.Threading.Tasks;37{38    {39        static async Task Main(string[] args)40        {41            var detector = new FailureDetector();42            detector.Start();43            await Task.Delay(5000);44            detector.Stop();45            await Task.Delay(5000);46        }47    }48}49using Microsoft.Coyote.Samples.Monitors;50using Microsoft.Coyote;51using System;52using System.Threading.Tasks;53{54    {55        static async Task Main(string[] args)56        {

FailureDetector

Using AI Code Generation

1using Microsoft.Coyote;2using Microsoft.Coyote.Samples.Monitors;3using System.Threading.Tasks;4{5    {6        static void Main(string[] args)7        {8            var detector = new FailureDetector();9            detector.Start();10            detector.WaitForFailure();11            detector.Stop();12        }13    }14}15using Microsoft.Coyote;16using Microsoft.Coyote.Samples.Monitors;17using System.Threading.Tasks;18{19    {20        static async Task Main(string[] args)21        {22            var detector = new FailureDetector();23            detector.Start();24            await detector.WaitForFailureAsync();25            detector.Stop();26        }27    }28}29using Microsoft.Coyote;30using Microsoft.Coyote.Samples.Monitors;31using System.Threading.Tasks;32{33    {34        static void Main(string[] args)35        {36            var detector = new FailureDetector();37            detector.Start();38            detector.WaitForFailure();39            detector.Stop();40        }41    }42}43using Microsoft.Coyote;44using Microsoft.Coyote.Samples.Monitors;45using System.Threading.Tasks;46{47    {48        static async Task Main(string[] args)49        {50            var detector = new FailureDetector();51            detector.Start();52            await detector.WaitForFailureAsync();53            detector.Stop();54        }55    }56}

FailureDetector

Using AI Code Generation

1{2    {3        static void Main(string[] args)4        {5            var monitor = new FailureDetector();6            var runtime = RuntimeFactory.Create();7            runtime.RegisterMonitor(monitor);8            var actor = new MyActor();9            runtime.RegisterActor(actor);10            runtime.Start();11            runtime.Wait();12            Console.WriteLine(monitor.ToString());13        }14    }15}16{17    {18        static void Main(string[] args)19        {20            var monitor = new FailureDetector();21            var runtime = RuntimeFactory.Create();22            runtime.RegisterMonitor(monitor);23            var actor = new MyActor();24            runtime.RegisterActor(actor);25            runtime.Start();26            runtime.Wait();27            Console.WriteLine(monitor.ToString());28        }29    }30}31{32    {33        static void Main(string[] args)34        {35            var monitor = new FailureDetector();36            var runtime = RuntimeFactory.Create();37            runtime.RegisterMonitor(monitor);38            var actor = new MyActor();39            runtime.RegisterActor(actor);40            runtime.Start();41            runtime.Wait();42            Console.WriteLine(monitor.ToString());43        }44    }45}

FailureDetector

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2{3    static void Main(string[] args)4    {5        var fd = new FailureDetector();6        fd.Start();7        fd.Client();8    }9}10using Microsoft.Coyote.Samples.Monitors;11{12    static void Main(string[] args)13    {14        var fd = new FailureDetector();15        fd.Start();16        fd.Client();17    }18}19using Microsoft.Coyote.Samples.Monitors;20{21    static void Main(string[] args)22    {23        var fd = new FailureDetector();24        fd.Start();25        fd.Client();26    }27}28using Microsoft.Coyote.Samples.Monitors;29{30    static void Main(string[] args)31    {32        var fd = new FailureDetector();33        fd.Start();34        fd.Client();35    }36}37using Microsoft.Coyote.Samples.Monitors;38{39    static void Main(string[] args)40    {41        var fd = new FailureDetector();42        fd.Start();43        fd.Client();44    }45}46using Microsoft.Coyote.Samples.Monitors;47{48    static void Main(string[] args)49    {50        var fd = new FailureDetector();

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