string SelectDestinationAddress(string endpoint, Func <EndpointInstance, string> resolveTransportAddress)
{
var candidates = endpointInstances.FindInstances(endpoint).Select(resolveTransportAddress).ToArray();
var selected = distributionPolicy.GetDistributionStrategy(endpoint, DistributionStrategyScope.Send).SelectDestination(candidates);
return(selected);
}
async Task Send(Subscriber subscriber, string publisherEndpoint, string messageType, MessageIntentEnum intent, IRawEndpoint dispatcher)
{
var publisherInstances = endpointInstances.FindInstances(publisherEndpoint);
var publisherAddresses = publisherInstances.Select(i => dispatcher.ToTransportAddress(LogicalAddress.CreateRemoteAddress(i))).ToArray();
foreach (var publisherAddress in publisherAddresses)
{
Logger.Debug(
$"Sending {intent} request for {messageType} to {publisherAddress} on behalf of {subscriber.TransportAddress}.");
var subscriptionMessage = ControlMessageFactory.Create(intent);
subscriptionMessage.Headers[Headers.SubscriptionMessageType] = messageType;
subscriptionMessage.Headers[Headers.ReplyToAddress] = dispatcher.TransportAddress;
subscriptionMessage.Headers[Headers.SubscriberTransportAddress] = dispatcher.TransportAddress;
subscriptionMessage.Headers[Headers.SubscriberEndpoint] = dispatcher.EndpointName;
subscriptionMessage.Headers["NServiceBus.Bridge.DestinationEndpoint"] = publisherEndpoint;
subscriptionMessage.Headers[Headers.TimeSent] = DateTimeExtensions.ToWireFormattedString(DateTime.UtcNow);
subscriptionMessage.Headers[Headers.NServiceBusVersion] = "6.3.1"; //The code has been copied from 6.3.1
var transportOperation = new TransportOperation(subscriptionMessage, new UnicastAddressTag(publisherAddress));
await dispatcher.Dispatch(new TransportOperations(transportOperation), new TransportTransaction(),
new ContextBag()).ConfigureAwait(false);
}
}
async Task Send(Subscriber subscriber, string publisherEndpoint, string messageType, MessageIntentEnum intent, IRawEndpoint dispatcher, InterBridgeRoutingSettings forwarding)
{
var typeFullName = messageType.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries).First();
if (!forwarding.PublisherTable.TryGetValue(typeFullName, out var nextHopEndpoint))
{
return;
}
var subscriptionMessage = ControlMessageFactory.Create(intent);
if (publisherEndpoint != null)
{
subscriptionMessage.Headers["NServiceBus.Bridge.DestinationEndpoint"] = publisherEndpoint;
}
subscriptionMessage.Headers[Headers.SubscriptionMessageType] = messageType;
subscriptionMessage.Headers[Headers.ReplyToAddress] = dispatcher.TransportAddress;
subscriptionMessage.Headers[Headers.SubscriberTransportAddress] = dispatcher.TransportAddress;
subscriptionMessage.Headers[Headers.SubscriberEndpoint] = dispatcher.EndpointName;
subscriptionMessage.Headers[Headers.TimeSent] = DateTimeExtensions.ToWireFormattedString(DateTime.UtcNow);
subscriptionMessage.Headers[Headers.NServiceBusVersion] = "6.3.1"; //The code has been copied from 6.3.1
var publisherInstances = endpointInstances.FindInstances(nextHopEndpoint);
var publisherAddresses = publisherInstances.Select(i => dispatcher.ToTransportAddress(LogicalAddress.CreateRemoteAddress(i))).ToArray();
foreach (var publisherAddress in publisherAddresses)
{
Logger.Debug(
$"Sending {intent} request for {messageType} to {publisherAddress} on behalf of {subscriber.TransportAddress}.");
var transportOperation = new TransportOperation(subscriptionMessage, new UnicastAddressTag(publisherAddress));
await dispatcher.Dispatch(new TransportOperations(transportOperation), new TransportTransaction(),
new ContextBag()).ConfigureAwait(false);
}
}
public void Should_default_to_single_instance_when_not_configured()
{
var instances = new EndpointInstances();
var salesInstances = instances.FindInstances("Sales");
var singleInstance = salesInstances.Single();
Assert.IsNull(singleInstance.Discriminator);
Assert.IsEmpty(singleInstance.Properties);
}
public Task Invoke(MulticastContext context, Func <PostroutingContext, Task> next)
{
var addresses = endpointInstances.FindInstances(context.DestinationEndpoint)
.Select(resolveTransportAddress)
.ToArray();
var operations = addresses.Select(a => new TransportOperation(context.Message, new UnicastAddressTag(a)));
return(next(new PostroutingContext(context.DestinationEndpoint, operations.ToArray(), context)));
}
public void Should_add_instances_grouped_by_endpoint_name()
{
var instances = new EndpointInstances();
const string endpointName1 = "EndpointA";
const string endpointName2 = "EndpointB";
instances.AddOrReplaceInstances("A", new List <EndpointInstance>
{
new EndpointInstance(endpointName1),
new EndpointInstance(endpointName2)
});
var salesInstances = instances.FindInstances(endpointName1);
Assert.AreEqual(1, salesInstances.Count());
var otherInstances = instances.FindInstances(endpointName2);
Assert.AreEqual(1, otherInstances.Count());
}
public Task Invoke(AnycastContext context, Func <PostroutingContext, Task> next)
{
var candidates = endpointInstances.FindInstances(context.DestinationEndpoint)
.Select(resolveTransportAddress)
.ToArray();
var selected = distributionPolicy.GetDistributionStrategy(context.DestinationEndpoint, context.DistributionScope).SelectDestination(candidates);
var operation = new TransportOperation(context.Message, new UnicastAddressTag(selected));
return(next(new PostroutingContext(context.DestinationEndpoint, operation, context)));
}
public void Should_filter_out_duplicate_instances()
{
var instances = new EndpointInstances();
var sales = "Sales";
instances.AddOrReplaceInstances("A", new List <EndpointInstance>
{
new EndpointInstance(sales, "dup"),
new EndpointInstance(sales, "dup")
});
var salesInstances = instances.FindInstances(sales);
Assert.AreEqual(1, salesInstances.Count());
}
public void Should_return_instances_configured_by_static_route()
{
var instances = new EndpointInstances();
var sales = "Sales";
instances.AddOrReplaceInstances("A", new List <EndpointInstance>
{
new EndpointInstance(sales, "1"),
new EndpointInstance(sales, "2")
});
var salesInstances = instances.FindInstances(sales);
Assert.AreEqual(2, salesInstances.Count());
}
IEnumerable <string> ResolveRoute(UnicastRoute route)
{
if (route.Instance != null)
{
yield return(resolveTransportAddress(route.Instance));
}
else if (route.PhysicalAddress != null)
{
yield return(route.PhysicalAddress);
}
else
{
foreach (var instance in endpointInstances.FindInstances(route.Endpoint))
{
yield return(resolveTransportAddress(instance));
}
}
}
public IEnumerable <string> GetAllTopicExchangeAddresses() => endpointInstances.FindInstances(topicExchangeName) .Select(transportAddressTranslation);
