public static IEventHandler UseServiceBusForDurability(
this object handler,
ServiceBusSettings settings,
string handlerCatchupAlias = null,
Configuration configuration = null)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
if (settings == null)
{
throw new ArgumentNullException("settings");
}
configuration = configuration ?? Configuration.Global;
var queues = new Dictionary <Type, QueueClient>();
var binders = EventHandler.GetBinders(handler);
// create queues
var subscriptions = binders.Select(binder => SubscribeToReceiveMessages(binder, handler, settings, configuration, queues))
.ToArray();
configuration.RegisterDisposable(new CompositeDisposable(subscriptions));
// intercept events for the consequenter and queue them on Service Bus
var wrappedHandler = handler.WrapAll(SimulatedSend ?? SendMessage(queues));
return(wrappedHandler);
}
/// <summary>
/// Initializes a new instance of the <see cref="ServiceBusCommandQueueReceiver"/> class.
/// </summary>
/// <param name="settings">The service bus settings.</param>
/// <param name="clockTrigger">The command clockTrigger.</param>
/// <exception cref="System.ArgumentNullException">
/// settings
/// or
/// clockTrigger
/// </exception>
public ServiceBusCommandQueueReceiver(
ServiceBusSettings settings,
ISchedulerClockTrigger clockTrigger,
Func <CommandSchedulerDbContext> createCommandSchedulerDbContext)
{
if (settings == null)
{
throw new ArgumentNullException("settings");
}
if (clockTrigger == null)
{
throw new ArgumentNullException("clockTrigger");
}
if (createCommandSchedulerDbContext == null)
{
throw new ArgumentNullException("createCommandSchedulerDbContext");
}
this.settings = settings;
this.clockTrigger = clockTrigger;
this.createCommandSchedulerDbContext = createCommandSchedulerDbContext;
#if DEBUG
exceptionSubject
.Where(ex => !(ex is OperationCanceledException))
.Subscribe(ex => Debug.WriteLine("ServiceBusCommandQueueReceiver error: " + ex));
#endif
}
/// <summary>
/// Initializes a new instance of the <see cref="ServiceBusCommandQueueReceiver"/> class.
/// </summary>
/// <param name="settings">The service bus settings.</param>
/// <param name="clockTrigger">The command clockTrigger.</param>
/// <exception cref="System.ArgumentNullException">
/// settings
/// or
/// clockTrigger
/// </exception>
public ServiceBusCommandQueueReceiver(
ServiceBusSettings settings,
ISchedulerClockTrigger clockTrigger,
Func<CommandSchedulerDbContext> createCommandSchedulerDbContext)
{
if (settings == null)
{
throw new ArgumentNullException("settings");
}
if (clockTrigger == null)
{
throw new ArgumentNullException("clockTrigger");
}
if (createCommandSchedulerDbContext == null)
{
throw new ArgumentNullException("createCommandSchedulerDbContext");
}
this.settings = settings;
this.clockTrigger = clockTrigger;
this.createCommandSchedulerDbContext = createCommandSchedulerDbContext;
#if DEBUG
exceptionSubject
.Where(ex => !(ex is OperationCanceledException))
.Subscribe(ex => Debug.WriteLine("ServiceBusCommandQueueReceiver error: " + ex));
#endif
}
private static void CreateTopicIfDoesNotAlreadyExist(
this ServiceBusSettings settings,
TopicDescription topicDescription)
{
var namespaceManager = NamespaceManager.CreateFromConnectionString(settings.ConnectionString);
if (!namespaceManager.TopicExists(topicDescription.Path))
{
namespaceManager.CreateTopic(topicDescription);
}
}
private static void CreateSubscriptionIfDoesNotAlreadyExist(
this ServiceBusSettings settings,
SubscriptionDescription subscriptionDescription)
{
var namespaceManager = NamespaceManager.CreateFromConnectionString(settings.ConnectionString);
if (!namespaceManager.SubscriptionExists(subscriptionDescription.TopicPath, subscriptionDescription.Name))
{
namespaceManager.CreateSubscription(subscriptionDescription);
}
}
private static void CreateQueueIfDoesNotAlreadyExist(
this ServiceBusSettings settings,
QueueDescription queueDescription)
{
var namespaceManager = NamespaceManager.CreateFromConnectionString(settings.ConnectionString);
if (!namespaceManager.QueueExists(queueDescription.Path))
{
namespaceManager.CreateQueue(queueDescription);
}
}
private static IDisposable SubscribeToReceiveMessages <THandler>(
IEventHandlerBinder binder,
THandler handler,
ServiceBusSettings settings,
Configuration configuration,
Dictionary <Type, QueueClient> queues) where THandler : class
{
Type eventType = ((dynamic)binder).EventType;
var queueName = string.Format("{0}_on_{1}.{2}",
EventHandler.Name(handler),
eventType.AggregateTypeForEventType().Name,
eventType.EventName());
var bus = new InProcessEventBus(errorSubject: (ISubject <EventHandlingError>)configuration.EventBus.Errors);
var eventBusSubscription = binder.SubscribeToBus(handler, bus);
var receive = SimulatedReceive;
if (receive != null)
{
var receiveSubscription = receive.Subscribe(e => bus.PublishAsync(e).Subscribe(_ => { }, ex => bus.PublishErrorAsync(new EventHandlingError(ex, @event: e))));
return(new CompositeDisposable(eventBusSubscription,
receiveSubscription));
}
var queueClient = settings.CreateQueueClient(
queueName,
settings.ConfigureQueue);
// starting listening on the queue for incoming events
queueClient.OnMessage(msg =>
{
var storedEvent = msg.GetBody <string>()
.FromJsonTo <StoredEvent>();
var @event = Serializer.DeserializeEvent(
aggregateName: storedEvent.AggregateName,
eventName: storedEvent.EventName,
body: storedEvent.Body,
aggregateId: storedEvent.AggregateId,
sequenceNumber: storedEvent.SequenceNumber,
timestamp: storedEvent.Timestamp);
bus.PublishAsync(@event).Subscribe(
_ => msg.Complete(),
ex => bus.PublishErrorAsync(new EventHandlingError(ex, @event: @event)));
});
queues[((dynamic)binder).EventType] = queueClient;
return(new CompositeDisposable(eventBusSubscription, Disposable.Create(queueClient.Close)));
}
internal static QueueClient CreateQueueClient(ServiceBusSettings settings)
{
return(settings.CreateQueueClient(
"ScheduledCommands",
q =>
{
q.SupportOrdering = true;
q.RequiresSession = true;
q.LockDuration = TimeSpan.FromMinutes(5);
q.MaxDeliveryCount = (int)(TimeSpan.FromDays(45).Ticks / q.LockDuration.Ticks);
q.EnableDeadLetteringOnMessageExpiration = false;
}));
}
/// <summary>
/// Initializes a new instance of the <see cref="ServiceBusCommandQueueSender"/> class.
/// </summary>
/// <exception cref="System.ArgumentNullException">queueClient</exception>
public ServiceBusCommandQueueSender(ServiceBusSettings settings)
{
if (settings == null)
{
throw new ArgumentNullException("settings");
}
this.settings = settings;
MessageDeliveryOffsetFromCommandDueTime = TimeSpan.FromMinutes(2);
#if DEBUG
exceptionSubject.Subscribe(ex => Debug.WriteLine("ServiceBusCommandQueueSender error: " + ex));
#endif
}
/// <summary>
/// Initializes a new instance of the <see cref="ServiceBusCommandQueueSender"/> class.
/// </summary>
/// <exception cref="System.ArgumentNullException">queueClient</exception>
public ServiceBusCommandQueueSender(ServiceBusSettings settings)
{
if (settings == null)
{
throw new ArgumentNullException("settings");
}
this.settings = settings;
MessageDeliveryOffsetFromCommandDueTime = TimeSpan.FromMinutes(2);
#if DEBUG
exceptionSubject.Subscribe(ex => Debug.WriteLine("ServiceBusCommandQueueSender error: " + ex));
#endif
}
/// <summary>
/// Creates a queue client, as well as the target queue if it does not already exist.
/// </summary>
public static QueueClient CreateQueueClient(
this ServiceBusSettings settings,
string queueName,
Action <QueueDescription> configure = null)
{
queueName = queueName.PrefixedIfConfigured(settings);
var queueDescription = new QueueDescription(queueName);
if (configure != null)
{
configure(queueDescription);
}
settings.CreateQueueIfDoesNotAlreadyExist(queueDescription);
return(QueueClient.CreateFromConnectionString(settings.ConnectionString, queueName));
}
/// <summary>
/// Creates a topic client, as well as the target topic if it does not already exist.
/// </summary>
public static TopicClient CreateTopicClient(
this ServiceBusSettings settings,
string topicName,
Action <TopicDescription> configure = null)
{
topicName = topicName.PrefixedIfConfigured(settings);
var topicDescription = new TopicDescription(topicName);
if (configure != null)
{
configure(topicDescription);
}
settings.CreateTopicIfDoesNotAlreadyExist(topicDescription);
return(TopicClient.CreateFromConnectionString(settings.ConnectionString, topicName));
}
/// <summary>
/// Creates a subscription client, as well as the target subscription if it does not already exist.
/// </summary>
public static SubscriptionClient CreateSubscriptionClient(
this ServiceBusSettings settings,
string topicPath,
string subscriptionName,
Action <SubscriptionDescription> configure = null)
{
topicPath = topicPath.PrefixedIfConfigured(settings);
var subscriptionDescription = new SubscriptionDescription(topicPath, subscriptionName);
if (configure != null)
{
configure(subscriptionDescription);
}
settings.CreateSubscriptionIfDoesNotAlreadyExist(subscriptionDescription);
return(SubscriptionClient.CreateFromConnectionString(settings.ConnectionString, subscriptionDescription.TopicPath, subscriptionDescription.Name));
}
/// <summary>
/// Initializes a new instance of the <see cref="ServiceBusCommandQueueReceiver"/> class.
/// </summary>
/// <param name="settings">The service bus settings.</param>
/// <param name="scheduler">The command scheduler.</param>
/// <exception cref="System.ArgumentNullException">
/// settings
/// or
/// scheduler
/// </exception>
public ServiceBusCommandQueueReceiver(ServiceBusSettings settings, SqlCommandScheduler scheduler)
{
if (settings == null)
{
throw new ArgumentNullException("settings");
}
if (scheduler == null)
{
throw new ArgumentNullException("scheduler");
}
this.settings = settings;
this.scheduler = scheduler;
#if DEBUG
exceptionSubject
.Where(ex => !(ex is OperationCanceledException))
.Subscribe(ex => Debug.WriteLine("ServiceBusCommandQueueReceiver error: " + ex));
#endif
}
public override void SetUp()
{
base.SetUp();
schedulerActivity = new List<IScheduledCommand>();
using (VirtualClock.Start(DateTimeOffset.Now.AddMonths(1)))
{
disposables = new CompositeDisposable();
Settings.Sources = new ISettingsSource[] { new ConfigDirectorySettings(@"c:\dev\.config") }.Concat(Settings.Sources);
serviceBusSettings = Settings.Get<ServiceBusSettings>();
serviceBusSettings.NamePrefix = "itscqrstests";
serviceBusSettings.ConfigureQueue = q => { q.AutoDeleteOnIdle = TimeSpan.FromMinutes(15); };
var clockName = Any.Paragraph(4);
var configuration = new Configuration()
.UseSqlEventStore()
.UseDependency<GetClockName>(_ => @event => clockName)
.UseSqlStorageForScheduledCommands()
.AddToCommandSchedulerPipeline<Order>(
schedule: async (cmd, next) =>
{
await next(cmd);
schedulerActivity.Add(cmd);
},
deliver: async (cmd, next) =>
{
await next(cmd);
schedulerActivity.Add(cmd);
});
queueSender = new ServiceBusCommandQueueSender(serviceBusSettings)
{
MessageDeliveryOffsetFromCommandDueTime = TimeSpan.FromSeconds(30)
};
disposables.Add(queueSender.Messages.Subscribe(s => Console.WriteLine("[ServiceBusCommandQueueSender] " + s.ToJson())));
disposables.Add(configuration);
disposables.Add(ConfigurationContext.Establish(configuration));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ServiceBusCommandQueueReceiver"/> class.
/// </summary>
/// <param name="settings">The service bus settings.</param>
/// <param name="scheduler">The command scheduler.</param>
/// <exception cref="System.ArgumentNullException">
/// settings
/// or
/// scheduler
/// </exception>
public ServiceBusCommandQueueReceiver(ServiceBusSettings settings, SqlCommandScheduler scheduler)
{
if (settings == null)
{
throw new ArgumentNullException("settings");
}
if (scheduler == null)
{
throw new ArgumentNullException("scheduler");
}
this.settings = settings;
this.scheduler = scheduler;
#if DEBUG
exceptionSubject
.Where(ex => !(ex is OperationCanceledException))
.Subscribe(ex => Debug.WriteLine("ServiceBusCommandQueueReceiver error: " + ex));
#endif
}
public override void SetUp()
{
base.SetUp();
using (VirtualClock.Start(DateTimeOffset.Now.AddMonths(1)))
{
disposables = new CompositeDisposable();
Settings.Sources = new ISettingsSource[] { new ConfigDirectorySettings(@"c:\dev\.config") }.Concat(Settings.Sources);
serviceBusSettings = Settings.Get<ServiceBusSettings>();
serviceBusSettings.NamePrefix = "itscqrstests";
serviceBusSettings.ConfigureQueue = q =>
{
q.AutoDeleteOnIdle = TimeSpan.FromMinutes(15);
};
bus = new FakeEventBus();
orderRepository = new SqlEventSourcedRepository<Order>(bus);
var configuration = new Configuration()
.UseSqlEventStore(() => new EventStoreDbContext())
.UseEventBus(bus)
.UseSqlCommandScheduling()
.UseDependency<IEventSourcedRepository<Order>>(t => orderRepository);
var clockName = Any.Paragraph(4);
scheduler = new SqlCommandScheduler(configuration) { GetClockName = @event => clockName };
queueSender = new ServiceBusCommandQueueSender(serviceBusSettings)
{
MessageDeliveryOffsetFromCommandDueTime = TimeSpan.FromSeconds(30)
};
disposables.Add(scheduler.Activity.Subscribe(s => Console.WriteLine("SqlCommandScheduler: " + s.ToJson())));
disposables.Add(queueSender.Messages.Subscribe(s => Console.WriteLine("ServiceBusCommandQueueSender: " + s.ToJson())));
disposables.Add(bus.Subscribe(scheduler));
disposables.Add(configuration);
disposables.Add(ConfigurationContext.Establish(configuration));
}
}
internal static QueueClient CreateQueueClient(ServiceBusSettings settings)
{
return settings.CreateQueueClient(
"ScheduledCommands",
q =>
{
q.SupportOrdering = true;
q.RequiresSession = true;
q.LockDuration = TimeSpan.FromMinutes(5);
q.MaxDeliveryCount = (int) (TimeSpan.FromDays(45).Ticks / q.LockDuration.Ticks);
q.EnableDeadLetteringOnMessageExpiration = false;
});
}
private static string PrefixedIfConfigured(this string name, ServiceBusSettings settings)
{
return (string.IsNullOrEmpty(settings.NamePrefix) ? "" : settings.NamePrefix + "_") + name;
}
private static string PrefixedIfConfigured(this string name, ServiceBusSettings settings)
{
return((string.IsNullOrEmpty(settings.NamePrefix) ? "" : settings.NamePrefix + "_") + name);
}