TopologySectionInternal BuildSubscriptionHierarchy(Type eventType, string localAddress)
{
var namespaces = namespacePartitioningStrategy.GetNamespaces(PartitioningIntent.Creating).ToArray();
// Using localAddress that will be provided by SubscriptionManager instead of the endpoint name.
// Reason: endpoint name can be overridden. If the endpoint name is overridden, "originalEndpointName" will not have the override value.
var sanitizedInputQueuePath = addressingLogic.Apply(localAddress, EntityType.Queue).Name;
var sanitizedSubscriptionPath = addressingLogic.Apply(localAddress, EntityType.Subscription).Name;
// rule name needs to be 1) based on event full name 2) unique 3) deterministic
var ruleName = addressingLogic.Apply(eventType.FullName, EntityType.Rule).Name;
var subs = new List <SubscriptionInfoInternal>();
var topics = CreateTopics(namespaces);
foreach (var topic in topics)
{
subs.AddRange(namespaces.Select(ns =>
{
var sub = new SubscriptionInfoInternal
{
Namespace = ns,
Type = EntityType.Subscription,
Path = sanitizedSubscriptionPath,
Metadata = new ForwardingTopologySubscriptionMetadata
{
Description = $"Events {originalEndpointName} is subscribed to",
SubscriptionNameBasedOnEventWithNamespace = ruleName,
NamespaceInfo = ns,
SubscribedEventFullName = eventType.FullName
},
BrokerSideFilter = new SqlSubscriptionFilter(eventType),
ShouldBeListenedTo = false
};
sub.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = sub,
Target = topic,
Type = EntityRelationShipTypeInternal.Subscription
});
sub.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = sub,
Target = new EntityInfoInternal
{
Namespace = ns,
Path = sanitizedInputQueuePath,
Type = EntityType.Queue
},
Type = EntityRelationShipTypeInternal.Forward
});
return(sub);
}));
}
return(new TopologySectionInternal
{
Entities = subs,
Namespaces = namespaces
});
}
void CreateForwardingTopologyPart(Type eventType, List <SubscriptionInfoInternal> subs, RuntimeNamespaceInfo[] namespaces, string sanitizedSubscriptionPath, string ruleName, string sanitizedInputQueuePath)
{
subs.AddRange(namespaces.Select(ns =>
{
var sub = new SubscriptionInfoInternal
{
Namespace = ns,
Type = EntityType.Subscription,
Path = sanitizedSubscriptionPath,
Metadata = new ForwardingTopologySubscriptionMetadata
{
Description = $"Events {originalEndpointName} is subscribed to",
SubscriptionNameBasedOnEventWithNamespace = ruleName,
NamespaceInfo = ns,
SubscribedEventFullName = eventType.FullName
},
BrokerSideFilter = new SqlSubscriptionFilter(eventType),
ShouldBeListenedTo = false
};
sub.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = sub,
Target = new EntityInfoInternal
{
Namespace = ns,
Path = "bundle-1",
Type = EntityType.Topic
},
Type = EntityRelationShipTypeInternal.Subscription
});
sub.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = sub,
Target = new EntityInfoInternal
{
Namespace = ns,
Path = sanitizedInputQueuePath,
Type = EntityType.Queue
},
Type = EntityRelationShipTypeInternal.Forward
});
return(sub);
}));
}
public TopologySectionInternal DetermineTopicsToCreate(string localAddress)
{
var namespaces = namespacePartitioningStrategy.GetNamespaces(PartitioningIntent.Creating).ToArray();
var entities = new List <EntityInfoInternal>();
foreach (var n in namespaces)
{
// legacy topic
entities.Add(new EntityInfoInternal
{
Path = addressingLogic.Apply(localAddress + ".events", EntityType.Topic).Name,
Type = EntityType.Topic,
Namespace = n
});
// bundle from forwarding
entities.Add(new EntityInfoInternal
{
Path = "bundle-1",
Type = EntityType.Topic,
Namespace = n
});
// migration
// Dedup is defined in custom descriptor override, ugly yes but necessary evil
entities.Add(new EntityInfoInternal
{
Path = MigrationTopicName,
Type = EntityType.Topic,
Namespace = n
});
var subscription = new SubscriptionInfoInternal
{
Namespace = n,
Type = EntityType.Subscription,
Path = MigrationTopicName,
Metadata = new SubscriptionMetadataInternal
{
Description = "Forwarding to bundle-1",
SubscriptionNameBasedOnEventWithNamespace = MigrationTopicName
},
BrokerSideFilter = new CatchAllSubscriptionFilter(),
ShouldBeListenedTo = false
};
subscription.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = subscription,
Target = new EntityInfoInternal
{
Namespace = n,
Path = MigrationTopicName,
Type = EntityType.Topic
},
Type = EntityRelationShipTypeInternal.Subscription
});
subscription.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = subscription,
Target = new EntityInfoInternal
{
Namespace = n,
Path = "bundle-1",
Type = EntityType.Topic
},
Type = EntityRelationShipTypeInternal.Forward
});
entities.Add(subscription);
}
return(new TopologySectionInternal
{
Namespaces = namespaces,
Entities = entities
});
}
TopologySectionInternal BuildSubscriptionHierarchy(Type eventType, string localAddress)
{
var namespaces = namespacePartitioningStrategy.GetNamespaces(PartitioningIntent.Creating).ToArray();
var publishers = publishersConfiguration.GetPublishersFor(eventType);
// Using localAddress that will be provided by SubscriptionManager instead of the endpoint name.
// Reason: endpoint name can be overridden. If the endpoint name is overridden, "originalEndpointName" will not have the override value.
var subscriptionNameCandidateV6 = $"{localAddress}.{eventType.Name}";
var subscriptionNameV6 = addressingLogic.Apply(subscriptionNameCandidateV6, EntityType.Subscription).Name;
var subscriptionNameCandidate = $"{localAddress}.{eventType.FullName}";
var subscriptionName = addressingLogic.Apply(subscriptionNameCandidate, EntityType.Subscription).Name;
// Using localAddress that will be provided by SubscriptionManager instead of the endpoint name.
// Reason: endpoint name can be overridden. If the endpoint name is overridden, "originalEndpointName" will not have the override value.
var sanitizedInputQueuePath = addressingLogic.Apply(localAddress, EntityType.Queue).Name;
var sanitizedSubscriptionPath = addressingLogic.Apply(localAddress, EntityType.Subscription).Name;
var ruleName = addressingLogic.Apply(eventType.FullName, EntityType.Rule).Name;
var topics = new List <EntityInfoInternal>();
var subs = new List <SubscriptionInfoInternal>();
foreach (var publisher in publishers)
{
var topicPath = $"{publisher}.events";
var path = addressingLogic.Apply(topicPath, EntityType.Topic).Name;
var destinationsOutsideTopology = namespaceConfigurations.Where(c => c.RegisteredEndpoints.Contains(publisher, StringComparer.OrdinalIgnoreCase)).ToList();
if (destinationsOutsideTopology.Any())
{
// It's important to create Forwarding topology subscription infrastructure first in order not to lose messages in flight auto-forwarded by subscriptions under Endpoint-oriented topology
CreateForwardingTopologyPart(eventType, subs, namespaces, sanitizedSubscriptionPath, ruleName, sanitizedInputQueuePath);
topics.AddRange(destinationsOutsideTopology.Select(ns => new EntityInfoInternal
{
Namespace = new RuntimeNamespaceInfo(ns.Alias, ns.Connection, NamespacePurpose.Routing),
Type = EntityType.Topic,
Path = path
}));
subs.AddRange(destinationsOutsideTopology.Select(ns =>
{
var rns = new RuntimeNamespaceInfo(ns.Alias, ns.Connection, NamespacePurpose.Routing);
var sub = new SubscriptionInfoInternal
{
Namespace = rns,
Type = EntityType.Subscription,
Path = subscriptionNameV6,
Metadata = new SubscriptionMetadataInternal
{
Description = $"{originalEndpointName} subscribed to {eventType.FullName}",
SubscriptionNameBasedOnEventWithNamespace = subscriptionName
},
BrokerSideFilter = new SqlSubscriptionFilter(eventType),
ShouldBeListenedTo = false
};
sub.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = sub,
Target = topics.First(t => t.Path == path && t.Namespace == rns),
Type = EntityRelationShipTypeInternal.Subscription
});
sub.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = sub,
Target = new EntityInfoInternal
{
Namespace = new RuntimeNamespaceInfo(ns.Alias, ns.Connection),
Path = MigrationTopicName,
Type = EntityType.Topic
},
Type = EntityRelationShipTypeInternal.Forward
});
return(sub);
}));
}
else
{
// It's important to create Forwarding topology subscription infrastructure first in order not to lose messages in flight auto-forwarded by subscriptions under Endpoint-oriented topology
CreateForwardingTopologyPart(eventType, subs, namespaces, sanitizedSubscriptionPath, ruleName, sanitizedInputQueuePath);
topics.AddRange(namespaces.Select(ns => new EntityInfoInternal
{
Namespace = ns,
Type = EntityType.Topic,
Path = path
}));
subs.AddRange(namespaces.Select(ns =>
{
var sub = new SubscriptionInfoInternal
{
Namespace = ns,
Type = EntityType.Subscription,
Path = subscriptionNameV6,
Metadata = new SubscriptionMetadataInternal
{
Description = $"{originalEndpointName} subscribed to {eventType.FullName}",
SubscriptionNameBasedOnEventWithNamespace = subscriptionName
},
BrokerSideFilter = new SqlSubscriptionFilter(eventType),
ShouldBeListenedTo = false
};
sub.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = sub,
Target = topics.First(t => t.Path == path && t.Namespace == ns),
Type = EntityRelationShipTypeInternal.Subscription
});
sub.RelationShips.Add(new EntityRelationShipInfoInternal
{
Source = sub,
Target = new EntityInfoInternal
{
Namespace = ns,
Path = MigrationTopicName,
Type = EntityType.Topic
},
Type = EntityRelationShipTypeInternal.Forward
});
return(sub);
}));
}
}
return(new TopologySectionInternal
{
Entities = subs,
Namespaces = namespaces
});
}
