protected override void Setup(FeatureConfigurationContext context)
{
var exchangeEndpointName = context.Settings.Get <string>(TopicExchangeEndpointNameKey);
var transportInfrastructure = context.Settings.Get <TransportInfrastructure>();
var conventions = context.Settings.Get <Conventions>();
var publishers = context.Settings.Get <Publishers>();
var endpointInstances = context.Settings.Get <EndpointInstances>();
var distributionPolicy = context.Settings.Get <DistributionPolicy>();
var topicExchangeAddressManager = new TopicExchangeAddressManager(
exchangeEndpointName,
endpointInstances,
i => transportInfrastructure.ToTransportAddress(LogicalAddress.CreateRemoteAddress(i)),
distributionPolicy
);
var eventTypes = context.Settings.GetAvailableTypes().Where(conventions.IsEventType).ToArray();
// Route all Subscription requests to the TopicExchange
publishers.AddOrReplacePublishers(
"TopicExchange",
eventTypes.Select(
e => new PublisherTableEntry(e, PublisherAddress.CreateFromEndpointName(exchangeEndpointName))
).ToList()
);
// Route a copy of all published events to the TopicExchange
context.RegisterStartupTask(b => new SubscribeTopicExchangeToAllEvents(
eventTypes,
b.Build <ISubscriptionStorage>(),
topicExchangeAddressManager
));
// Forward all incoming Subscribe/Unsubscribe requests from legacy subscribers to the topic exchange
context.Pipeline.Replace(
"ProcessSubscriptionRequests",
builder => new RerouteIncomingPubSubMessagesToTopicExchange(topicExchangeAddressManager),
"Reroutes incoming Subscribe and Unsubscribe messages to the topic exchange");
}
public SubscribeTopicExchangeToAllEvents(Type[] eventTypes, ISubscriptionStorage storage, TopicExchangeAddressManager addressManager)
{
this.eventTypes = eventTypes;
this.storage = storage;
this.addressManager = addressManager;
}
public RerouteIncomingPubSubMessagesToTopicExchange(TopicExchangeAddressManager addressManager)
{
this.addressManager = addressManager;
}
