/// <summary>
/// Sends the provided <paramref name="command"></paramref> and waits for an event of <typeparamref name="TEvent"/> or exits if the specified timeout is expired.
/// </summary>
/// <param name="command">The <typeparamref name="TCommand"/> to send.</param>
/// <param name="condition">A delegate to be executed over and over until it returns the <typeparamref name="TEvent"/> that is desired, return null to keep trying.</param>
/// <param name="millisecondsTimeout">The number of milliseconds to wait, or <see cref="F:System.Threading.Timeout.Infinite"/> (-1) to wait indefinitely.</param>
/// <param name="eventReceiver">If provided, is the <see cref="IEventReceiver{TAuthenticationToken}" /> that the event is expected to be returned on.</param>
public TEvent SendAndWait <TCommand, TEvent>(TCommand command, Func <IEnumerable <IEvent <TAuthenticationToken> >, TEvent> condition, int millisecondsTimeout,
IEventReceiver <TAuthenticationToken> eventReceiver = null) where TCommand : ICommand <TAuthenticationToken>
{
if (eventReceiver != null)
{
throw new NotSupportedException("Specifying a different event receiver is not yet supported.");
}
if (!PrepareAndValidateCommand(command))
{
return((TEvent)(object)null);
}
TEvent result = (TEvent)(object)null;
EventWaits.Add(command.CorrelationId, new List <IEvent <TAuthenticationToken> >());
ServiceBusPublisher.Send(new BrokeredMessage(MessageSerialiser.SerialiseCommand(command)));
Logger.LogInfo(string.Format("A command was sent of type {0}.", command.GetType().FullName));
SpinWait.SpinUntil(() =>
{
IList <IEvent <TAuthenticationToken> > events = EventWaits[command.CorrelationId];
result = condition(events);
return(result != null);
}, millisecondsTimeout);
return(result);
}
public void Send <TCommand>(TCommand command)
where TCommand : ICommand <TAuthenticationToken>
{
ICommandValidator <TAuthenticationToken, TCommand> commandValidator = null;
try
{
commandValidator = DependencyResolver.Resolve <ICommandValidator <TAuthenticationToken, TCommand> >();
}
catch (Exception exception)
{
Logger.LogDebug("Locating an ICommandValidator failed.", string.Format("{0}\\Handle({1})", GetType().FullName, command.GetType().FullName), exception);
}
if (commandValidator != null && !commandValidator.IsCommandValid(command))
{
Logger.LogInfo("The provided command is not valid.", string.Format("{0}\\Handle({1})", GetType().FullName, command.GetType().FullName));
return;
}
if (command.AuthenticationToken == null)
{
command.AuthenticationToken = AuthenticationTokenHelper.GetAuthenticationToken();
}
command.CorrelationId = CorrelationIdHelper.GetCorrelationId();
ServiceBusPublisher.Send(new BrokeredMessage(MessageSerialiser.SerialiseCommand(command)));
Logger.LogInfo(string.Format("A command was sent of type {0}.", command.GetType().FullName));
}
public static void Example(ServiceBusSettings settings)
{
_connection
= new ServiceBusPublisher <string>("HowToPublish example", settings)
.SetLog(new LogToConsole())
.SetSerializer(new TestServiceBusSerializer())
.Start();
}
public override void Configure(IFunctionsHostBuilder hostBuilder)
{
var configurationBuilder = new ConfigurationBuilder();
configurationBuilder.AddEnvironmentVariables();
var configuration = configurationBuilder.Build();
//set up event store
hostBuilder.Services.AddSingleton <IEventStoreConnection>(s => new EventStoreConnectionFactory(configuration).Create(s));
hostBuilder.Services.AddSingleton <IEventStore, Infrastructure.EventStore.EventStore>(s =>
{
var con = s.GetRequiredService <IEventStoreConnection>();
var eventstore = new Infrastructure.EventStore.EventStore(con);
return(eventstore);
});
var configRoot = new ConfigurationBuilder().AddEnvironmentVariables().Build();
hostBuilder.Services.AddSingleton(sp => configRoot);
//set up external service bus event publisher
var externalBusEventPublisher = hostBuilder.Services.BuildServiceProvider().GetService <IPublisher>();
if (externalBusEventPublisher == null)
{
string serviceBusConnectionString = configRoot["HOTEL_MANAGEMENT_SERVICEBUS"];
string topicName = configRoot["INVENTORY_EVENTS_TOPIC_NAME"];
externalBusEventPublisher = new ServiceBusPublisher(serviceBusConnectionString, topicName);
hostBuilder.Services.AddSingleton(externalBusEventPublisher);
}
//set up repositories
RegisterRepositories(hostBuilder, configRoot);
////repo factory set up
var repositoryFactory = new RepositoryFactory(new DependencyResolver(hostBuilder.Services));
hostBuilder.Services.AddScoped <IRepositoryFactory>(x =>
{
return(repositoryFactory);
});
//bus wiring
var bus = new Bus();
var builder = new Builder(repositoryFactory);
//register read model denormalizers
RegisterReadModelDenormalizers(builder);
//register builder handler with bus
bus.RegisterEventHandler(builder.Handle);
//register event store wrapper client
var serviceProvider = hostBuilder.Services.BuildServiceProvider();
var eventStore = serviceProvider.GetRequiredService <IEventStore>();
var eventStoreClient = new EventStoreClient(bus, eventStore, externalBusEventPublisher);
hostBuilder.Services.AddSingleton <IEventStoreClient>(sp => { return(eventStoreClient); });
//register bus
hostBuilder.Services.AddSingleton <IBus>(sp => { return(bus); });
}
public virtual void Publish <TEvent>(TEvent @event)
where TEvent : IEvent <TAuthenticationToken>
{
if (!AzureBusHelper.PrepareAndValidateEvent(@event, "Azure-ServiceBus"))
{
return;
}
ServiceBusPublisher.Send(new BrokeredMessage(MessageSerialiser.SerialiseEvent(@event)));
Logger.LogInfo(string.Format("An event was published with the id '{0}' was of type {1}.", @event.Id, @event.GetType().FullName));
}
public void Send <TCommand>(TCommand command)
where TCommand : ICommand <TAuthenticationToken>
{
if (!PrepareAndValidateCommand(command))
{
return;
}
ServiceBusPublisher.Send(new BrokeredMessage(MessageSerialiser.SerialiseCommand(command)));
Logger.LogInfo(string.Format("A command was sent of type {0}.", command.GetType().FullName));
}
public virtual void Publish <TEvent>(TEvent @event)
where TEvent : IEvent <TAuthenticationToken>
{
if (@event.AuthenticationToken == null)
{
@event.AuthenticationToken = AuthenticationTokenHelper.GetAuthenticationToken();
}
@event.CorrelationId = CorrelationIdHelper.GetCorrelationId();
@event.TimeStamp = DateTimeOffset.UtcNow;
ServiceBusPublisher.Send(new BrokeredMessage(MessageSerialiser.SerialiseEvent(@event)));
Logger.LogInfo(string.Format("An event was published with the id '{0}' was of type {1}.", @event.Id, @event.GetType().FullName));
}
protected virtual void TriggerConnectionSettingsChecking()
{
Task.Factory.StartNew(() =>
{
SpinWait.SpinUntil(() => ConnectionString != ConfigurationManager.GetSetting(MessageBusConnectionStringConfigurationKey));
Logger.LogInfo("Connecting string settings for the Azure Service Bus changed and will now refresh.");
// Update the connection string and trigger a restart;
ConnectionString = ConfigurationManager.GetSetting(MessageBusConnectionStringConfigurationKey);
Logger.LogDebug(string.Format("Updated connecting string settings set to {0}.", ConnectionString));
// Let's wrap up using this message bus and start the switch
if (ServiceBusPublisher != null)
{
ServiceBusPublisher.Close();
Logger.LogDebug("Publishing service bus closed.");
}
// Let's wrap up using this message bus and start the switch
if (ServiceBusReceiver != null)
{
ServiceBusReceiver.Close();
Logger.LogDebug("Receiving service bus closed.");
}
// Restart configuration, we order this intentionally with the receiver first as if this triggers the cancellation we know this isn't a publisher as well
if (ServiceBusReceiver != null)
{
Logger.LogDebug("Recursively calling into InstantiateReceiving.");
InstantiateReceiving();
// This will be the case of a connection setting change re-connection
if (ReceiverMessageHandler != null && ReceiverMessageHandlerOptions != null)
{
// Callback to handle received messages
Logger.LogDebug("Re-registering onMessage handler.");
ServiceBusReceiver.OnMessage(ReceiverMessageHandler, ReceiverMessageHandlerOptions);
}
else
{
Logger.LogWarning("No onMessage handler was found to re-bind.");
}
}
// Restart configuration, we order this intentionally with the publisher second as if this triggers the cancellation there's nothing else to process here
if (ServiceBusPublisher != null)
{
Logger.LogDebug("Recursively calling into InstantiatePublishing.");
InstantiatePublishing();
}
});
}
protected override void TriggerSettingsChecking()
{
// Let's wrap up using this message bus and start the switch
if (ServiceBusPublisher != null)
{
ServiceBusPublisher.Close();
Logger.LogDebug("Publishing service bus closed.");
}
foreach (SubscriptionClient serviceBusReceiver in ServiceBusReceivers.Values)
{
// Let's wrap up using this message bus and start the switch
if (serviceBusReceiver != null)
{
serviceBusReceiver.Close();
Logger.LogDebug("Receiving service bus closed.");
}
// Restart configuration, we order this intentionally with the receiver first as if this triggers the cancellation we know this isn't a publisher as well
if (serviceBusReceiver != null)
{
Logger.LogDebug("Recursively calling into InstantiateReceiving.");
InstantiateReceiving();
// This will be the case of a connection setting change re-connection
if (ReceiverMessageHandler != null && ReceiverMessageHandlerOptions != null)
{
// Callback to handle received messages
Logger.LogDebug("Re-registering onMessage handler.");
ApplyReceiverMessageHandler();
}
else
{
Logger.LogWarning("No onMessage handler was found to re-bind.");
}
}
}
// Restart configuration, we order this intentionally with the publisher second as if this triggers the cancellation there's nothing else to process here
if (ServiceBusPublisher != null)
{
Logger.LogDebug("Recursively calling into InstantiatePublishing.");
InstantiatePublishing();
}
}
/// <summary>
/// Publish <see cref="IIntegrationEvent"/> to service bus
/// </summary>
/// <param name="publisher"><see cref="ServiceBusPublisher"/></param>
/// <param name="event"><see cref="IIntegrationEvent"/> that needs to be published</param>
/// <param name="cancellationToken"><see cref="CancellationToken"/></param>
/// <returns><see cref="Task"/></returns>
public static async Task Publish(this ServiceBusPublisher publisher, IIntegrationEvent @event, CancellationToken cancellationToken = default)
{
await publisher(@event, cancellationToken);
}
/// <summary/>
public ServiceBus(ServiceBusPublisher publisher)
{
_publisher = publisher;
}
