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How to use IsDefaultHandlerAvailable method of Microsoft.Coyote.Actors.EventQueue class

Best Coyote code snippet using Microsoft.Coyote.Actors.EventQueue.IsDefaultHandlerAvailable

EventQueue.cs

Source:EventQueue.cs

...149                    this.Queue.Remove(node);150                    return (DequeueStatus.Success, node.Value.e, node.Value.eventGroup, null);151                }152                // No event can be dequeued, so check if there is a default event handler.153                if (!this.IsDefaultHandlerAvailable())154                {155                    // There is no default event handler installed, so do not return an event.156                    // Setting IsEventHandlerRunning must happen inside the lock as it needs157                    // to be synchronized with the enqueue and starting a new event handler.158                    this.IsEventHandlerRunning = false;159                    return (DequeueStatus.NotAvailable, null, null, null);160                }161            }162            // TODO: check op-id of default event.163            // A default event handler exists.164            return (DequeueStatus.Default, DefaultEvent.Instance, null, null);165        }166        /// <inheritdoc/>167        public void RaiseEvent(Event e, EventGroup eventGroup = null)168        {169            this.RaisedEvent = (e, eventGroup);170            this.OnRaiseEvent(e, eventGroup, null);171        }172        //// <inheritdoc/>173        public Task<Event> ReceiveEventAsync(Type eventType, Func<Event, bool> predicate = null)174        {175            var eventWaitTypes = new Dictionary<Type, Func<Event, bool>>176            {177                { eventType, predicate }178            };179            return this.ReceiveEventAsync(eventWaitTypes);180        }181        /// <inheritdoc/>182        public Task<Event> ReceiveEventAsync(params Type[] eventTypes)183        {184            var eventWaitTypes = new Dictionary<Type, Func<Event, bool>>();185            foreach (var type in eventTypes)186            {187                eventWaitTypes.Add(type, null);188            }189            return this.ReceiveEventAsync(eventWaitTypes);190        }191        /// <inheritdoc/>192        public Task<Event> ReceiveEventAsync(params Tuple<Type, Func<Event, bool>>[] events)193        {194            var eventWaitTypes = new Dictionary<Type, Func<Event, bool>>();195            foreach (var e in events)196            {197                eventWaitTypes.Add(e.Item1, e.Item2);198            }199            return this.ReceiveEventAsync(eventWaitTypes);200        }201        /// <summary>202        /// Waits for an event to be enqueued based on the conditions defined in the event wait types.203        /// </summary>204        private Task<Event> ReceiveEventAsync(Dictionary<Type, Func<Event, bool>> eventWaitTypes)205        {206            (Event e, EventGroup eventGroup) receivedEvent = default;207            lock (this.Queue)208            {209                var node = this.Queue.First;210                while (node != null)211                {212                    // Dequeue the first event that the caller waits to receive, if there is one in the queue.213                    if (eventWaitTypes.TryGetValue(node.Value.e.GetType(), out Func<Event, bool> predicate) &&214                        (predicate is null || predicate(node.Value.e)))215                    {216                        receivedEvent = node.Value;217                        this.Queue.Remove(node);218                        break;219                    }220                    node = node.Next;221                }222                if (receivedEvent == default)223                {224                    this.ReceiveCompletionSource = new TaskCompletionSource<Event>();225                    this.EventWaitTypes = eventWaitTypes;226                }227            }228            if (receivedEvent == default)229            {230                // Note that EventWaitTypes is racy, so should not be accessed outside231                // the lock, this is why we access eventWaitTypes instead.232                this.OnWaitEvent(eventWaitTypes.Keys);233                return this.ReceiveCompletionSource.Task;234            }235            this.OnReceiveEventWithoutWaiting(receivedEvent.e, receivedEvent.eventGroup, null);236            return Task.FromResult(receivedEvent.e);237        }238        /// <summary>239        /// Checks if the specified event is currently ignored.240        /// </summary>241        [MethodImpl(MethodImplOptions.AggressiveInlining)]242        protected virtual bool IsEventIgnored(Event e) => this.Owner.IsEventIgnored(e);243        /// <summary>244        /// Checks if the specified event is currently deferred.245        /// </summary>246        [MethodImpl(MethodImplOptions.AggressiveInlining)]247        protected virtual bool IsEventDeferred(Event e) => this.Owner.IsEventDeferred(e);248        /// <summary>249        /// Checks if a default handler is currently available.250        /// </summary>251        [MethodImpl(MethodImplOptions.AggressiveInlining)]252        protected virtual bool IsDefaultHandlerAvailable() => this.Owner.IsDefaultHandlerInstalled();253        /// <summary>254        /// Notifies the actor that an event has been enqueued.255        /// </summary>256        [MethodImpl(MethodImplOptions.AggressiveInlining)]257        protected virtual void OnEnqueueEvent(Event e, EventGroup eventGroup, EventInfo eventInfo) =>258            this.Owner.OnEnqueueEvent(e, eventGroup, eventInfo);259        /// <summary>260        /// Notifies the actor that an event has been raised.261        /// </summary>262        [MethodImpl(MethodImplOptions.AggressiveInlining)]263        protected virtual void OnRaiseEvent(Event e, EventGroup eventGroup, EventInfo eventInfo) =>264            this.Owner.OnRaiseEvent(e, eventGroup, eventInfo);265        /// <summary>266        /// Notifies the actor that it is waiting to receive an event of one of the specified types....

TestEventQueue.cs

Source:TestEventQueue.cs

...37            this.IsEventHandlerRunning = true;38        }39        protected override bool IsEventIgnored(Event e) => this.IgnoredEvents.Contains(e.GetType());40        protected override bool IsEventDeferred(Event e) => this.DeferredEvents.Contains(e.GetType());41        protected override bool IsDefaultHandlerAvailable() => this.IsDefaultHandlerInstalled;42        protected override void OnEnqueueEvent(Event e, EventGroup eventGroup, EventInfo eventInfo)43        {44            this.Logger.WriteLine("Enqueued event of type '{0}'.", e.GetType().FullName);45            this.Notify(Notification.EnqueueEvent, e, eventInfo);46        }47        protected override void OnRaiseEvent(Event e, EventGroup eventGroup, EventInfo eventInfo)48        {49            this.Logger.WriteLine("Raised event of type '{0}'.", e.GetType().FullName);50            this.Notify(Notification.RaiseEvent, e, eventInfo);51        }52        protected override void OnWaitEvent(IEnumerable<Type> eventTypes)53        {54            foreach (var type in eventTypes)55            {...

IsDefaultHandlerAvailable

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Actors.Timers;6using Microsoft.Coyote.SystematicTesting;7using Microsoft.Coyote.Tasks;8{9    {10        public static void Main(string[] args)11        {12            using (var runtime = RuntimeFactory.Create())13            {14                runtime.CreateActor(typeof(Root));15                runtime.WaitCompletion();16            }17        }18    }19    {20        private EventQueue EventQueue;21        protected override void OnInitialize(Event initialEvent)22        {23            this.EventQueue = this.Runtime.CreateEventQueue();24            this.SendEvent(this.Id, new E());25        }26        protected override async Task OnEvent(Event e)27        {28            if (e is E)29            {30                this.EventQueue.EnqueueEvent(new E2());31                this.Assert(this.EventQueue.IsDefaultHandlerAvailable);32                this.Assert(this.EventQueue.TryDequeueEvent(out Event e2));33                this.Assert(e2 is E2);34                this.Assert(!this.EventQueue.IsDefaultHandlerAvailable);35                this.Assert(!this.EventQueue.TryDequeueEvent(out Event e3));36                this.Assert(e3 == null);37            }38        }39    }40    public class E : Event { }41    public class E2 : Event { }42}43using System;44using System.Threading.Tasks;45using Microsoft.Coyote;46using Microsoft.Coyote.Actors;47using Microsoft.Coyote.Actors.Timers;48using Microsoft.Coyote.SystematicTesting;49using Microsoft.Coyote.Tasks;50{51    {52        public static void Main(string[] args)53        {54            using (var runtime = RuntimeFactory.Create())55            {56                runtime.CreateActor(typeof(Root));57                runtime.WaitCompletion();58            }59        }60    }61    {62        private EventQueue EventQueue;63        protected override void OnInitialize(Event initialEvent)64        {65            this.EventQueue = this.Runtime.CreateEventQueue();66            this.SendEvent(this.Id, new E());

IsDefaultHandlerAvailable

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using System.IO;7using Microsoft.Coyote.Actors;8using Microsoft.Coyote.Actors.Timers;9using Microsoft.Coyote;10using Microsoft.Coyote.TestingServices;11using Microsoft.Coyote.Specifications;12using Microsoft.Coyote.Tasks;13using Microsoft.Coyote.SystematicTesting;14using Microsoft.Coyote.Actors.SharedObjects;15using Microsoft.Coyote.Actors.Bridge;16using Microsoft.Coyote.Actors.Bridge.Mocks;17using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks;18using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks;19using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks;20using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks;21using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;22using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;23using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;24using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;25using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;26using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;27using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;28using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;29using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;30using Microsoft.Coyote.Actors.Bridge.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks.Mocks;

IsDefaultHandlerAvailable

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote.Actors;4{5    {6        static void Main(string[] args)7        {8            Console.WriteLine("Hello World!");9        }10    }11    {12        public int Value { get; set; }13    }14    {15        protected override Task OnInitializeAsync(Event initialEvent)16        {17            this.SendEvent(this.Id, new MyEvent() { Value = 1 });18            this.SendEvent(this.Id, new MyEvent() { Value = 2 });19            this.SendEvent(this.Id, new MyEvent() { Value = 3 });20            return Task.CompletedTask;21        }22        protected override Task OnEventAsync(Event e)23        {24            if (e is MyEvent myEvent)25            {26                if (this.EventQueue.IsDefaultHandlerAvailable)27                {28                    this.SendEvent(this.Id, new MyEvent() { Value = myEvent.Value + 1 });29                }30                {31                    Console.WriteLine($"EventQueue is not available for {myEvent.Value}");32                }33            }34            return Task.CompletedTask;35        }36    }37}

IsDefaultHandlerAvailable

Using AI Code Generation

1using Microsoft.Coyote.Actors;2using System;3using System.Threading.Tasks;4{5    {6        static void Main(string[] args)7        {8            var eventQueue = new EventQueue();9            var event1 = new Event1();10            var event2 = new Event2();11            eventQueue.Enqueue(event1);12            eventQueue.Enqueue(event2);13            var event3 = new Event3();14            var event4 = new Event4();15            eventQueue.Enqueue(event3);16            eventQueue.Enqueue(event4);17            var event5 = new Event5();18            var event6 = new Event6();19            eventQueue.Enqueue(event5);20            eventQueue.Enqueue(event6);21            var isDefaultHandlerAvailable = eventQueue.IsDefaultHandlerAvailable;22            Console.WriteLine($"IsDefaultHandlerAvailable: {isDefaultHandlerAvailable}");23            Console.ReadLine();24        }25    }26}

IsDefaultHandlerAvailable

Using AI Code Generation

1using Microsoft.Coyote;2using Microsoft.Coyote.Actors;3{4    {5        static void Main(string[] args)6        {7            var eventQueue = new EventQueue();8            eventQueue.Enqueue(new Event());9            var result = eventQueue.IsDefaultHandlerAvailable();10        }11    }12}13Error CS1061 'EventQueue' does not contain a definition for 'IsDefaultHandlerAvailable' and no accessible extension method 'IsDefaultHandlerAvailable' accepting a first argument of type 'EventQueue' could be found (are you missing a using directive or an assembly reference?)14using Microsoft.Coyote;15using Microsoft.Coyote.Actors;16{17    {18        static void Main(string[] args)19        {20            var eventQueue = new EventQueue();21            eventQueue.Enqueue(new Event());22            var result = eventQueue.IsDefaultHandlerAvailable;23        }24    }25}26Error CS1061 'EventQueue' does not contain a definition for 'IsDefaultHandlerAvailable' and no accessible extension method 'IsDefaultHandlerAvailable' accepting a first argument of type 'EventQueue' could be found (are you missing a using directive or an assembly reference?)27using Microsoft.Coyote;28using Microsoft.Coyote.Actors;29{30    {31        static void Main(string[] args)32        {33            var eventQueue = new EventQueue();34            eventQueue.Enqueue(new Event());35            var result = EventQueue.IsDefaultHandlerAvailable;36        }37    }38}39using Microsoft.Coyote;40using Microsoft.Coyote.Actors;41{

IsDefaultHandlerAvailable

Using AI Code Generation

1using Microsoft.Coyote.Actors;2using Microsoft.Coyote.Actors.Timers;3using System;4using System.Threading.Tasks;5{6    {7        static void Main(string[] args)8        {9            Run().Wait();10            Console.WriteLine("Press any key to continue");11            Console.ReadKey();12        }13        static async Task Run()14        {15            var runtime = RuntimeFactory.Create();16            var actor = runtime.CreateActor(typeof(MyActor));17            var evt = new MyEvent();18            await runtime.SendEvent(actor,

IsDefaultHandlerAvailable

Using AI Code Generation

1using System;2using Microsoft.Coyote.Actors;3using Microsoft.Coyote.Actors.Timers;4{5    {6        public static void Main(string[] args)7        {8            EventQueue queue = new EventQueue();9            queue.Enqueue(

IsDefaultHandlerAvailable

Using AI Code Generation

1using System;2using System.Collections.Generic;3using Microsoft.Coyote.Actors;4using Microsoft.Coyote.Specifications;5{6    {7        static void Main(string[] args)8        {9            var config = Configuration.Create();10            config.MaxSchedulingSteps = 100000;11            var runtime = RuntimeFactory.Create(config);12            runtime.CreateActor(typeof(Actor1));13            runtime.Run();14        }15    }16    {17        private ActorId actor2;18        protected override void OnInitialize(Event initialEvent)19        {20            this.actor2 = this.CreateActor(typeof(Actor2));21            this.SendEvent(this.actor2, new E1());22        }23        protected override void OnEvent(Event e)24        {25            if (e is E2)26            {27                this.Assert(this.Runtime.IsDefaultHandlerAvailable(this.actor2), "Actor2 is not available");28            }29        }30    }31    {32        protected override void OnEvent(Event e)33        {34            if (e is E1)35            {36                this.SendEvent(this.Id, new E2());37            }38        }39    }40    {41    }42    {43    }44}

IsDefaultHandlerAvailable

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Coyote;4using Microsoft.Coyote.Actors;5using Microsoft.Coyote.Samples;6using Microsoft.Coyote.Samples.Banking;7using Microsoft.Coyote.Samples.Banking.Actors;8using Microsoft.Coyote.Samples.Banking.Actors.Customer;9using Microsoft.Coyote.Samples.Banking.Actors.Manager;10using Microsoft.Coyote.Samples.Banking.Actors.Teller;11using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine;12using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Events;13using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.States;14using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions;15using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw;16using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Events;17using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.States;18using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions;19using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Events;20using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.States;21using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Transitions;22using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Transitions.Events;23using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Transitions.States;24using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Transitions.Transitions;25using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Transitions.Transitions.Events;26using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Transitions.Transitions.States;27using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Transitions.Transitions.Transitions;28using Microsoft.Coyote.Samples.Banking.Actors.TellerMachine.Transitions.Withdraw.Transitions.Transitions.Transitions.Transitions.Events;

IsDefaultHandlerAvailable

Using AI Code Generation

1{2    private static void Main(string[] args)3    {4        var runtime = RuntimeFactory.Create();5        runtime.RegisterMonitor(typeof(Monitor));6        runtime.CreateActor(typeof(Actor1));7        runtime.CreateActor(typeof(Actor2));8        runtime.CreateActor(typeof(Actor3));9        runtime.Start();10        runtime.Wait();11    }12}13{14    [OnEventDoAction(typeof(Actor1Event), nameof(HandleActor1Event))]15    private class Init : MonitorState { }16    private void HandleActor1Event()17    {18        if (this.IsDefaultHandlerAvailable(typeof(Actor1Event)))19        {20            this.Assert(false, "Actor1Event handler is available");21        }22    }23}24{25    [OnEventDoAction(typeof(Actor1Event), nameof(HandleActor1Event))]26    private class Init : State { }27    private void HandleActor1Event()28    {29        this.SendEvent(this.Id, new Actor2Event());30        this.SendEvent(this.Id, new Actor3Event());31    }32}33{34    [OnEventDoAction(typeof(Actor2Event), nameof(HandleActor2Event))]35    private class Init : State { }36    private void HandleActor2Event()37    {38        this.Assert(false, "Actor2Event handler is not available");39    }40}41{42    [OnEventDoAction(typeof(Actor3Event), nameof(HandleActor3Event))]43    private class Init : State { }44    private void HandleActor3Event()45    {46        this.Assert(false, "Actor3Event handler is not available");47    }48}49internal class Actor1Event : Event { }50internal class Actor2Event : Event { }51internal class Actor3Event : Event { }52Error: [Actor2] Assertion failure in Actor2.cs(23,13): Actor2Event handler is not available53Error: [Actor3] Assertion failure in Actor3.cs(23,13): Actor3Event handler is not available54Error: [Actor1] Assertion failure in Actor1.cs(22,13): Actor1Event handler is available

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