C# MessageBus类代码示例

        public async Task VerifySubscriberIsInitializedWhenRegistered()
        {
            // Setup the message bus.
            var cs = Any.String();
            var subscriber = new MockSubscriber();
            var mbf = new MockMessageBusFactory { Subscriber = subscriber };
            var mbd = new MessageBusDescription { ConnectionString = cs, Factory = mbf };
            var bus = new MessageBus(mbd);
            var entity = "MessageSendSuccess;MessageSendFailure";
            var name = "MessageSendSuccess";

            Assert.IsFalse(
                subscriber.IsInitialized, 
                "The subscriber should not be initialized before it is registered.");

            var called = false;

            // Register the subscriber.
            await bus.RegisterHandlerAsync(entity, name, message => Task.Run(() => { called = true; }));

            Assert.IsTrue(subscriber.IsInitialized, "The subscriber should be initialized after it is registered.");
            Assert.AreEqual(subscriber.Description.ConnectionString, cs);
            Assert.AreEqual(subscriber.Description.Entity, entity);
            Assert.AreEqual(subscriber.Description.Name, name);

            await subscriber.Handler.Invoke(null);
            Assert.IsTrue(called, "The handler must be callable.");

            // Close the bus.
            await bus.CloseAsync();

            Assert.IsTrue(subscriber.IsClosed, "The subscriber should be closed after the bus is closed.");
        }

    public void WhenSinkThrowsMessagesContinueToBeDelivered()
    {
        var sink = Substitute.For<IMessageSink>();
        var msg1 = Substitute.For<IMessageSinkMessage>();
        var msg2 = Substitute.For<IMessageSinkMessage>();
        var msg3 = Substitute.For<IMessageSinkMessage>();
        var messages = new List<IMessageSinkMessage>();
        sink.OnMessage(Arg.Any<IMessageSinkMessage>())
            .Returns(callInfo =>
            {
                var msg = (IMessageSinkMessage)callInfo[0];
                if (msg == msg2)
                    throw new Exception("whee!");
                else
                    messages.Add(msg);

                return false;
            });

        using (var bus = new MessageBus(sink))
        {
            bus.QueueMessage(msg1);
            bus.QueueMessage(msg2);
            bus.QueueMessage(msg3);
        }

        Assert.Collection(messages,
            message => Assert.Same(message, msg1),
            message => Assert.Same(message, msg3)
        );
    }

 static void Main(string[] args)
 {
     var bus = new MessageBus();
     var input = "";
     while ((input = Console.ReadLine()) != "Quit")
     {
         if (input == "1")
             MessageBus.Bus.Publish(new CreateIdeaMessage
             {
                 IdeaId = 1,
                 CaseId = 100
             });
         else if(input=="2")
             MessageBus.Bus.Publish(new CreateObjectiveMessage
             {
                 ObjectiveId = 12,
                 CaseId = 100
             });
         else
             MessageBus.Bus.Publish(new CreateTaskMessage
             {
                 TaskId = 12,
                 CaseId = 100
             });
     }
 }

        private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            Trello = new Trello("1ed8d91b5af35305a60e169a321ac248");
            MessageBus = new MessageBus();

            var exportCardsControl = new ExportCardsControl();
            var importCardsControl = new ImportCardsControl();
            var authorizeForm = new AuthorizationDialog();

            ExportCardsTaskPane = CustomTaskPanes.Add(exportCardsControl, "Export cards to Trello");
            ExportCardsTaskPane.Width = 300;
            ExportCardsTaskPane.DockPositionRestrict = MsoCTPDockPositionRestrict.msoCTPDockPositionRestrictNoHorizontal;

            ImportCardsTaskPane = CustomTaskPanes.Add(importCardsControl, "Import cards from Trello");
            ImportCardsTaskPane.Width = 300;
            ImportCardsTaskPane.DockPositionRestrict = MsoCTPDockPositionRestrict.msoCTPDockPositionRestrictNoHorizontal;

            TaskScheduler = TaskScheduler.FromCurrentSynchronizationContext();

            ExportCardsPresenter = new ExportCardsPresenter(exportCardsControl, Trello, new GridToNewCardTransformer(), TaskScheduler, MessageBus);
            ImportCardsPresenter = new ImportCardsPresenter(importCardsControl, MessageBus, Trello, TaskScheduler);
            AuthorizePresenter = new AuthorizePresenter(authorizeForm, Trello, MessageBus);

            Globals.Ribbons.TrelloRibbon.SetMessageBus(MessageBus);

            TryToAuthorizeTrello();
        }

        private Configuration()
        {
            /* bus intialisation */
            _bus = new MessageBus();
            //var eventStore = new SqlServerEventStore(_bus);
            //var eventStore = new SqlLiteEventStore(_bus);
            var eventStore = new InMemoryEventStore(_bus, inMemDict );
            var repository = new DomainRepository(eventStore);

            /* Account Domain */
            var commandService = new AccountApplicationService(repository);
            _bus.RegisterHandler<RegisterAccountCommand>(commandService.Handle);
            _bus.RegisterHandler<DebitAccountCommand>(commandService.Handle);
            _bus.RegisterHandler<UnlockAccountCommand>(commandService.Handle);

            var infoProjection = new AccountInfoProjection();
            _bus.RegisterHandler<AccountRegisteredEvent>(infoProjection.Handle);
            _bus.RegisterHandler<AccountLockedEvent>(infoProjection.Handle);
            _bus.RegisterHandler<AccountUnlockedEvent>(infoProjection.Handle);

            var balanceProjection = new AccountBalanceProjection();
            _bus.RegisterHandler<AccountRegisteredEvent>(balanceProjection.Handle);
            _bus.RegisterHandler<AccountDebitedEvent>(balanceProjection.Handle);

            var notification = new NotificationProjection();
            _bus.RegisterHandler<AccountRegisteredEvent>(notification.Handle);
            _bus.RegisterHandler<AccountDebitedEvent>(notification.Handle);
            _bus.RegisterHandler<AccountLockedEvent>(notification.Handle);
            _bus.RegisterHandler<AccountUnlockedEvent>(notification.Handle);
            _bus.RegisterHandler<AccountOverdrawAttemptedEvent>(notification.Handle);

            _AccountReadModel = new AccountReadModelFacade(balanceProjection, infoProjection, notification);

            /*  News Domain*/
            //var newsEventStore = new SqlServerEventStore(_bus);
            //var newsEventStore = new SqlLiteEventStore(_bus);
            var newsEventStore = new InMemoryEventStore(_bus, inMemDict);
            var newsRepository = new DomainRepository(eventStore);

            /* Register command on the News bounded context */
            var newsCommandService = new AccountManager.Models.News.Domain.NewsApplicationService(newsRepository);
            _bus.RegisterHandler<AccountManager.Models.News.Commands.CreateNewsCommand>(newsCommandService.Handle);
            _bus.RegisterHandler<AccountManager.Models.News.Commands.PublishNewsCommand>(newsCommandService.Handle);
            _bus.RegisterHandler<AccountManager.Models.News.Commands.UnpublishNewsCommand>(newsCommandService.Handle);
            _bus.RegisterHandler<AccountManager.Models.News.Commands.UpdateNewsCommand>(newsCommandService.Handle);
            _bus.RegisterHandler<AccountManager.Models.News.Commands.DeleteNewsCommand>(newsCommandService.Handle);

            var _newsProjection = new AccountManager.Models.News.ReadModel.NewsProjection();
            _bus.RegisterHandler<AccountManager.Models.News.Events.NewsCreatedEvent>(_newsProjection.Handle);
            _bus.RegisterHandler<AccountManager.Models.News.Events.NewsPublishedEvent>(_newsProjection.Handle);
            _bus.RegisterHandler<AccountManager.Models.News.Events.NewsUnpublishedEvent>(_newsProjection.Handle);
            _bus.RegisterHandler<AccountManager.Models.News.Events.NewsUpdatedEvent>(_newsProjection.Handle);
            _bus.RegisterHandler<AccountManager.Models.News.Events.NewsDeletedEvent>(_newsProjection.Handle);

            _NewsReadModel = new NewsReadModelFacade(_newsProjection);

            /* rehydrate */
            var events = eventStore.GetAllEventsEver();
            _bus.Publish(events);
        }

        private Configuration()
        {
            _bus = new MessageBus();
            var eventStore = new SqlEventStore(_bus);
            var repository = new DomainRepository(eventStore);

            var commandService = new AccountApplicationService(repository);
            _bus.RegisterHandler<RegisterAccountCommand>(commandService.Handle);
            _bus.RegisterHandler<DebitAccountCommand>(commandService.Handle);
            _bus.RegisterHandler<UnlockAccountCommand>(commandService.Handle);

            var infoProjection = new AccountInfoProjection();
            _bus.RegisterHandler<AccountRegisteredEvent>(infoProjection.Handle);
            _bus.RegisterHandler<AccountLockedEvent>(infoProjection.Handle);
            _bus.RegisterHandler<AccountUnlockedEvent>(infoProjection.Handle);

            var balanceProjection = new AccountBalanceProjection();
            _bus.RegisterHandler<AccountRegisteredEvent>(balanceProjection.Handle);
            _bus.RegisterHandler<AccountDebitedEvent>(balanceProjection.Handle);

            var notification = new NotificationProjection();
            _bus.RegisterHandler<AccountRegisteredEvent>(notification.Handle);
            _bus.RegisterHandler<AccountDebitedEvent>(notification.Handle);
            _bus.RegisterHandler<AccountLockedEvent>(notification.Handle);
            _bus.RegisterHandler<AccountUnlockedEvent>(notification.Handle);
            _bus.RegisterHandler<OverdrawAttemptedEvent>(notification.Handle);

            _readModel = new ReadModelFacade(balanceProjection, infoProjection, notification);

            var events = eventStore.GetAllEventsEver();
            _bus.Publish(events);
        }

        /// <summary>
        /// Handles the specified subscription command line options.
        /// </summary>
        /// <param name="options">
        /// The options.
        /// </param>
        public static void Handle(SubscriptionOptions options)
        {
            if (options.IsVerbose)
            {
                Debug.Listeners.Add(new ColoredConsoleTraceListener());
            }

            OutputWriter = !string.IsNullOrWhiteSpace(options.OutputFileName)
                               ? new StreamWriter(options.OutputFileName)
                               : Console.Out;

            var description = new MessageBusDescription
                                  {
                                      ConnectionString = options.ConnectionString, 
                                      Factory =
                                          DependencyResolver.Resolve<IMessageBusFactory>(
                                              options.Factory), 
                                      StorageConnectionString = options.StorageConnectionString
                                  };
            var bus = new MessageBus(description);
            bus.RegisterHandlerAsync(options.Entity, options.Name, OnMessageArrived).Wait();

            Debug.Print("This is a debug print.");
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();

            Console.WriteLine("Closing message bus...");
            bus.CloseAsync().ContinueWith(t => Console.WriteLine("Message bus is closed.")).Wait();
        }

 public SkyBox(int id, MessageBus bus)
 {
     Id = id;
     Bus = bus;
     Position = new Vect3(0, 0, 0);
     Rotation = new Quat(Math.Sqrt(0.5), 0, 0, Math.Sqrt(0.5));
 }

        public void MultiplePublishers()
        {
            const string message1 = "Test Message #1";
            const string message2 = "Test Message #2";
            const string message3 = "Test Message #3";
            const string message4 = "Test Message #4";
            string receivedMessage = null;

            var messageBus = new MessageBus();
            var publisher1 = new Subject<string>();
            var publisher2 = new Subject<string>();
            var subscription1 = messageBus.RegisterPublisher(publisher1);
            messageBus.RegisterPublisher(publisher2);

            messageBus.Listen<string>().Subscribe(m => receivedMessage = m, e => Assert.Fail(), Assert.Fail);
            Assert.IsNull(receivedMessage);

            messageBus.Publish(message1);
            Assert.AreEqual(message1, receivedMessage);

            publisher1.OnNext(message2);
            Assert.AreEqual(message2, receivedMessage);

            publisher2.OnNext(message3);
            Assert.AreEqual(message3, receivedMessage);

            subscription1.Dispose();
            publisher1.OnNext(message4);
            Assert.AreEqual(message3, receivedMessage);

            publisher2.OnNext(message4);
            Assert.AreEqual(message4, receivedMessage);
        }

 public void CreateBus()
 {
     m_Sender = Substitute.For<IMessageSender>();
     m_Receiver = Substitute.For<IMessageReceiver>();
     m_Bus = new MessageBus(m_Sender,
                            m_Receiver);
 }

 /// <summary>
 /// Construct a boot strapper for Light framework. 
 /// </summary>
 /// <param name="Args">Application init args</param>
 public Bootstrapper(string[] Args)
 {
     MessageBus = new MessageBus();
     Modules = new List<LightModule>();
     LoadAssemblies();
     MessageBus.Run();
 }

 public void FalseWithNoSubscribers()
 {
     var bus = new MessageBus();
     bus.HasSubscriberFor<Message>()
         .Should().BeFalse(
             "no subscribers have been added");
 }

 public void Initialise(MessageBus bus)
 {
     Bus = bus;
     SystemMessages = Bus.OfType<SystemMessage>().AsObservable();
     ObjectLifeTimeRequests = Bus.OfType<IObjectLifetimeRequest>().AsObservable();
     ObjectLifeTimeNotifications = Bus.OfType<IObjectLifetimeNotification>().AsObservable();
 }

        private static MessageBus GetPersistedEventBus()
        {
            var persistedEventBus = new MessageBus();

            //application handlers

            persistedEventBus.RegisterHandler<RepliedToPostEvent>(MessageHandlerType.Synchronous, OnRepliedToPost, true);
            persistedEventBus.RegisterHandler<ApprovedCommentEvent>(MessageHandlerType.Synchronous, OnApprovedComment, true);
            persistedEventBus.RegisterHandler<FailedMessage>(MessageHandlerType.Synchronous, OnFailMessage, false);

            //sync handlers
            //persistedEventBus.RegisterHandler<RepliedToPostEvent>(MessageHandlerType.Synchronous, e => UpdateComment( e.Comment), true);
            //persistedEventBus.RegisterHandler<ApprovedCommentEvent>(MessageHandlerType.Synchronous, e => UpdateComment( e.Comment), true);

            //persistedEventBus.RegisterHandler<AssignedCategoryToPostEvent>(MessageHandlerType.Synchronous, e => CreateCategoryLink(e.Post,e.Category), true);

            //persistedEventBus.RegisterHandler<EditedPostEvent>(MessageHandlerType.Synchronous, e => UpdatePost(e.Post), true);
            //persistedEventBus.RegisterHandler<EnabledCommentsEvent>(MessageHandlerType.Synchronous, e => UpdatePost(e.Post), true);
            //persistedEventBus.RegisterHandler<DisabledCommentsEvent>(MessageHandlerType.Synchronous, e => UpdatePost(e.Post), true);
            //persistedEventBus.RegisterHandler<PostCreatedEvent>(MessageHandlerType.Synchronous, e => UpdatePost(e.Post), true);
            //persistedEventBus.RegisterHandler<PublishedPostEvent>(MessageHandlerType.Synchronous, e => DeletePost(e.Post), true);
            //persistedEventBus.RegisterHandler<UnpublishedPostEvent>(MessageHandlerType.Synchronous, e => DeletePost(e.Post), true);

            //persistedEventBus.RegisterHandler<PostDeletedEvent>(MessageHandlerType.Synchronous, e => DeletePost(e.Post), true);


            return persistedEventBus;
        }

        public void CanListenPositionChangeEvents()
        {
            // ARRANGE
            var waitEvent = new ManualResetEvent(false);
            var messageBus = new MessageBus();
            NmeaPositionMocker mocker;
            int count = 0;
            messageBus.AsObservable<GeoPosition>()
                .ObserveOn(Scheduler.ThreadPool)
                .Subscribe(position => count++);

            // ACT
            Action<TimeSpan> delayAction = _ => Thread.Sleep(0); // do not wait to make test faster
            using (Stream stream = new FileStream(TestHelper.NmeaFilePath, FileMode.Open))
            {
                mocker = new NmeaPositionMocker(stream, messageBus);
                mocker.OnDone += (s, e) => waitEvent.Set();
                mocker.Start(delayAction);
            }

            // ASSERT
            if(!waitEvent.WaitOne(TimeSpan.FromSeconds(60)))
                throw new TimeoutException();
            mocker.Stop();
            Assert.AreEqual(16, count);
        }