public void setup()
{
_exception = null;
try
{
_point = new HeadingEventReader(10);
}
catch (Exception ex)
{
_exception = ex;
}
_distibutionPointCorrelationId = Guid.NewGuid();
_point.Start(
_distibutionPointCorrelationId,
new TransactionFileEventReader(
_bus, _distibutionPointCorrelationId, new EventPosition(0, -1), new RealTimeProvider()));
_point.Handle(
new ProjectionCoreServiceMessage.CommittedEventDistributed(
_distibutionPointCorrelationId, new EventPosition(20, 10), "stream", 10, false,
ResolvedEvent.Sample(Guid.NewGuid(), "type", false, new byte[0], new byte[0])));
_point.Handle(
new ProjectionCoreServiceMessage.CommittedEventDistributed(
_distibutionPointCorrelationId, new EventPosition(40, 30), "stream", 11, false,
ResolvedEvent.Sample(Guid.NewGuid(), "type", false, new byte[0], new byte[0])));
_subscription = new FakeProjectionSubscription();
_projectionSubscriptionId = Guid.NewGuid();
var subscribed = _point.TrySubscribe(_projectionSubscriptionId, _subscription, 30);
Assert.IsTrue(subscribed); // ensure we really unsubscribing.. even if it is tested elsewhere
_point.Unsubscribe(_projectionSubscriptionId);
}
public void Handle(ReaderSubscriptionManagement.Pause message)
{
if (!_pausedSubscriptions.Add(message.SubscriptionId))
{
throw new InvalidOperationException("Already paused projection");
}
IReaderSubscription projectionSubscription;
if (!_subscriptions.TryGetValue(message.SubscriptionId, out projectionSubscription))
{
return; // may be already unsubscribed when self-unsubscribing
}
var eventReaderId = _subscriptionEventReaders[message.SubscriptionId];
if (eventReaderId == Guid.Empty) // head
{
_subscriptionEventReaders.Remove(message.SubscriptionId);
_headingEventReader.Unsubscribe(message.SubscriptionId);
var forkedEventReaderId = Guid.NewGuid();
var forkedEventReader = projectionSubscription.CreatePausedEventReader(
_publisher, _ioDispatcher, forkedEventReaderId);
_subscriptionEventReaders.Add(message.SubscriptionId, forkedEventReaderId);
_eventReaderSubscriptions.Add(forkedEventReaderId, message.SubscriptionId);
_eventReaders.Add(forkedEventReaderId, forkedEventReader);
_publisher.Publish(
new EventReaderSubscriptionMessage.ReaderAssignedReader(
message.SubscriptionId, forkedEventReaderId));
}
else
{
_eventReaders[eventReaderId].Pause();
}
}
public void Handle(ReaderSubscriptionManagement.Pause message)
{
if (!_pausedSubscriptions.Add(message.SubscriptionId))
{
throw new InvalidOperationException("Already paused projection");
}
var projectionSubscription = _subscriptions[message.SubscriptionId];
var eventReaderId = _subscriptionEventReaders[message.SubscriptionId];
if (eventReaderId == Guid.Empty) // head
{
_subscriptionEventReaders.Remove(message.SubscriptionId);
_headingEventReader.Unsubscribe(message.SubscriptionId);
var forkedEventReaderId = Guid.NewGuid();
var forkedEventReader = projectionSubscription.CreatePausedEventReader(_publisher, forkedEventReaderId);
_subscriptionEventReaders.Add(message.SubscriptionId, forkedEventReaderId);
_eventReaderSubscriptions.Add(forkedEventReaderId, message.SubscriptionId);
_eventReaders.Add(forkedEventReaderId, forkedEventReader);
_publisher.Publish(
new ReaderSubscriptionManagement.ReaderAssignedReader(message.SubscriptionId, forkedEventReaderId));
}
else
{
_eventReaders[eventReaderId].Pause();
}
}
