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

Best Coyote code snippet using Microsoft.Coyote.Samples.Monitors.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 Microsoft.Coyote.Samples.Monitors;2using System;3using System.Threading.Tasks;4{5    {6        static void Main(string[] args)7        {8            Console.WriteLine("Hello World!");9            Console.WriteLine("Press any key to continue...");10            Console.ReadKey();11        }12        public async Task DoSomething()13        {14            await Task.Delay(1000);15            throw new Exception("Error in DoSomething");16        }17    }18}19using Microsoft.Coyote.Samples.Monitors;20using System;21using System.Threading.Tasks;22{23    {24        static void Main(string[] args)25        {26            Console.WriteLine("Hello World!");27            Console.WriteLine("Press any key to continue...");28            Console.ReadKey();29        }30        public async Task DoSomething()31        {32            await Task.Delay(1000);33            throw new Exception("Error in DoSomething");34        }35    }36}37{38    using System;39    using System.Collections.Generic;40    using System.Linq;41    using Microsoft.Coyote.Actors;42    using Microsoft.Coyote.Runtime;43    using Microsoft.Coyote.Specifications;44    using Microsoft.Coyote.Tasks;45    {46        {47            public ActorId NodeId;48            public NodeFailedEvent(ActorId nodeId)49            {50                this.NodeId = nodeId;51            }52        }53        {54            public ActorId NodeId;55            public NodeRecoveredEvent(ActorId nodeId)56            {57                this.NodeId = nodeId;58            }59        }60        {61            public ActorId NodeId;62            public NodeIsUpEvent(ActorId nodeId)63            {64                this.NodeId = nodeId;65            }66        }67        private Dictionary<ActorId, bool> NodeStatus;68        [OnEventDoAction(typeof(NodeIsUpEvent), nameof(NodeIsUp))]69        {

NodeFailed

Using AI Code Generation

1using System;2using Microsoft.Coyote;3using Microsoft.Coyote.Actors;4using Microsoft.Coyote.Samples.Monitors;5{6    {7        static void Main(string[] args)8        {9            var monitor = new NodeFailedMonitor();10            var runtime = RuntimeFactory.Create();11            runtime.RegisterMonitor(monitor);12            var actor = runtime.CreateActor(typeof(MyActor));13            runtime.SendEvent(actor, new MyEvent());14            monitor.Wait();15            runtime.Shutdown();16        }17    }18    {19    }20    {21        [OnEventDoAction(typeof(MyEvent), nameof(MyAction))]22        {23        }24        private void MyAction()25        {26            throw new Exception("Failed");27        }28    }29}30using System;31using System.Collections.Generic;32using System.Linq;33using System.Text;34using System.Threading;35using System.Threading.Tasks;36using Microsoft.Coyote;37using Microsoft.Coyote.Actors;38using Microsoft.Coyote.Samples.Monitors;39{40    {41        static void Main(string[] args)42        {43            var monitor = new NodeFailedMonitor();44            var runtime = RuntimeFactory.Create();45            runtime.RegisterMonitor(monitor);46            var actor = runtime.CreateActor(typeof(MyActor));47            runtime.SendEvent(actor, new MyEvent());48            monitor.Wait();49            runtime.Shutdown();50        }51    }52    {53    }54    {55        [OnEventDoAction(typeof(MyEvent), nameof

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            await Task.Run(() => {9                Console.WriteLine("Hello World!");10            });11        }12    }13}14using Microsoft.Coyote.Samples.Monitors;15using System;16using System.Threading.Tasks;17{18    {19        static async Task Main(string[] args)20        {21            await Task.Run(() => {22                Console.WriteLine("Hello World!");23            });24        }25    }26}27The type or namespace name 'NodeFailed' could not be found (are you missing a using directive or an assembly reference?)28The type or namespace name 'NodeFailed' could not be found (are you missing a using directive or an assembly reference?)

NodeFailed

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2using System;3using System.Threading.Tasks;4using Microsoft.Coyote;5using Microsoft.Coyote.Actors;6{7    {8        public static async Task Main(string[] args)9        {10            var runtime = await RuntimeFactory.Create();11            await runtime.CreateActor(typeof(Monitor), new ActorId("Monitor"));12            await runtime.CreateActor(typeof(Node), new ActorId("Node1"));13            await runtime.CreateActor(typeof(Node), new ActorId("Node2"));14            await runtime.CreateActor(typeof(Node), new ActorId("Node3"));15            await runtime.CreateActor(typeof(Node), new ActorId("Node4"));16            await runtime.CreateActor(typeof(Node), new ActorId("Node5"));17            await runtime.CreateActor(typeof(Node), new ActorId("Node6"));18            await runtime.CreateActor(typeof(Node), new ActorId("Node7"));19            await runtime.CreateActor(typeof(Node), new ActorId("Node8"));20            await runtime.CreateActor(typeof(Node), new ActorId("Node9"));21            await runtime.CreateActor(typeof(Node), new ActorId("Node10"));22            await runtime.CreateActor(typeof(Node), new ActorId("Node11"));23            await runtime.CreateActor(typeof(Node), new ActorId("Node12"));24            await runtime.CreateActor(typeof(Node), new ActorId("Node13"));25            await runtime.CreateActor(typeof(Node), new ActorId("Node14"));26            await runtime.CreateActor(typeof(Node), new ActorId("Node15"));27            await runtime.CreateActor(typeof(Node), new ActorId("Node16"));28            await runtime.CreateActor(typeof(Node), new ActorId("Node17"));29            await runtime.CreateActor(typeof(Node), new ActorId("Node18"));30            await runtime.CreateActor(typeof(Node), new ActorId("Node19"));31            await runtime.CreateActor(typeof(Node), new ActorId("Node20"));32            await runtime.CreateActor(typeof(Node), new ActorId("Node21"));33            await runtime.CreateActor(typeof(Node), new ActorId("Node22"));34            await runtime.CreateActor(typeof(Node), new ActorId("Node23"));35            await runtime.CreateActor(typeof(Node), new ActorId("Node24"));36            await runtime.CreateActor(typeof(Node), new ActorId("Node25"));37            await runtime.CreateActor(typeof(Node), new ActorId("Node26"));38            await runtime.CreateActor(typeof(Node), new ActorId("Node27"));39            await runtime.CreateActor(typeof(Node), new ActorId("

NodeFailed

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2using Microsoft.Coyote;3using Microsoft.Coyote.Tasks;4using System.Threading.Tasks;5{6    {7        static void Main(string[] args)8        {9            var config = Configuration.Create().WithVerbosityEnabled();10            var runtime = RuntimeFactory.Create(config);11            runtime.RegisterMonitor<NodeFailed>();12            runtime.CreateActor(typeof(Node));13            runtime.CreateActor(typeof(Node));14            runtime.CreateActor(typeof(Node));15            runtime.CreateActor(typeof(Node));16            runtime.Wait();17        }18    }19    {20        [OnEntry(nameof(InitOnEntry))]21        [OnEventDoAction(typeof(Start), nameof(StartAction))]22        [OnEventDoAction(typeof(NodeFailed), nameof(NodeFailedAction))]23        class Init : State { }24        void InitOnEntry()25        {26            this.Monitor<NodeFailed>(new NodeFailedEvent(this.Id));27        }28        void StartAction()29        {30            this.RaiseEvent(new Halt());31        }32        void NodeFailedAction()33        {

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 nodeFailedMonitor = new NodeFailed();9            var runtime = Microsoft.Coyote.Runtime.Create();10            runtime.RegisterMonitor(nodeFailedMonitor);11            var crasher = runtime.CreateActor(typeof(Crasher));12            var sender = runtime.CreateActor(typeof(Sender), crasher);13            await nodeFailedMonitor.CrashTask;14            runtime.Dispose();15        }16    }17}18using Microsoft.Coyote;19using Microsoft.Coyote.Actors;20using System;21using System.Threading.Tasks;22{23    {24        protected override async Task OnInitializeAsync(Event initialEvent)25        {26            var delay = new Random().Next(100);27            await this.RandomDelayAsync(delay);28            this.RaiseHaltEvent();29        }30    }31}32using Microsoft.Coyote;33using Microsoft.Coyote.Actors;34using System;35{36    {37        private readonly ActorId Crasher;38        public Sender(ActorId crasher) => this.Crasher = crasher;39        protected override async Task OnInitializeAsync(Event initialEvent)40        {41            var delay = new Random().Next(100);42            await this.RandomDelayAsync(delay);43            this.SendEvent(this.Crasher, new E());44        }45    }46}

NodeFailed

Using AI Code Generation

1using Microsoft.Coyote.Samples.Monitors;2using Microsoft.CoyoteActors.TestingServices.Runtime;3using System;4using System.Threading.Tasks;5{6    {7        public static async Task Main(string[] args)8        {9            var configuration = Configuration.Create();10            configuration.SchedulingIterations = 100;11            configuration.SchedulingStrategy = SchedulingStrategy.PCT;12            configuration.SchedulingSeed = 0;13            configuration.SchedulingVerbosity = SchedulingVerbosity.Detailed;14            configuration.SchedulingIterationsToPrint = 10;15            configuration.EnableMonitorsInProduction = true;16            configuration.EnableDataRaceDetection = true;17            configuration.EnableDeadlockDetection = true;18            configuration.EnableOperationCanceledHandling = true;19            configuration.EnableActorGarbageCollection = true;20            configuration.EnableActorStatePrinting = true;21            configuration.EnableActorTaskDebugging = true;22            configuration.EnableActorTaskExceptionHandling = true;23            configuration.EnableActorTaskScheduling = true;24            configuration.EnableActorTaskSynchronization = true;25            configuration.EnableActorTaskWait = true;26            configuration.EnableActorTaskWaitAll = true;27            configuration.EnableActorTaskWaitAny = true;28            configuration.EnableActorTaskYield = true;29            configuration.EnableActorWaitEvent = true;30            configuration.EnableActorWaitEventAsync = true;31            configuration.EnableActorWaitEventGroup = true;32            configuration.EnableActorWaitEventGroupAsync = true;33            configuration.EnableActorWaitEventGroupTimeout = true;34            configuration.EnableActorWaitEventGroupTimeoutAsync = true;35            configuration.EnableActorWaitEventTimeout = true;36            configuration.EnableActorWaitEventTimeoutAsync = true;37            configuration.EnableActorWaitEventWithUnlimitedTimeout = true;38            configuration.EnableActorWaitEventWithUnlimitedTimeoutAsync = true;39            configuration.EnableActorWaitEventWithZeroTimeout = true;40            configuration.EnableActorWaitEventWithZeroTimeoutAsync = true;41            configuration.EnableActorWaitState = true;42            configuration.EnableActorWaitStateAsync = true;43            configuration.EnableActorWaitStateTimeout = true;44            configuration.EnableActorWaitStateTimeoutAsync = true;45            configuration.EnableActorWaitStateWithUnlimitedTimeout = true;46            configuration.EnableActorWaitStateWithUnlimitedTimeoutAsync = true;47            configuration.EnableActorWaitStateWithZeroTimeout = true;48            configuration.EnableActorWaitStateWithZeroTimeoutAsync = true;49            configuration.EnableActorWaitTask = true;

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