This qeuestion is on consuming the messages using AMQP in .Net. The documentation recommends amqpnetlite: https://access.redhat.com/documentation/en-us/red_hat_amq/7.0/html-single/using_the_amq_.net_client/index
On subscribing to an address using AMQPNetLite, the address and the queue will be auto-created. The auto-created queue is always "unicast" though. I have not been able to auto-create
- a multicast queue
- that allowed any number of consumers.
Code:
private async Task RenewSession() { Connect = await Connection.Factory.CreateAsync(new Address("amqp://admin:admin@localhost:5672"), new Open() {ContainerId = "client-1"}); MqSession = new Session(Connect); var receiver = new ReceiverLink(MqSession, DEFAULT_SUBSCRIPTION_NAME, GetSource("test-topic"), null); receiver.Start(100, OnMessage); } private Source GetSource(string address) { var source = new Source { Address = address, ExpiryPolicy = new Symbol("never"), Durable = 2, DefaultOutcome = new Modified { DeliveryFailed = true, UndeliverableHere = false } }; return source; }
Maybe I am missing some flags?
in AMQP, you choose between autocreating a queue (anycast routing) or a topic (multicast routing) by setting a capability.
The capability should be either new Symbol("queue") or new Symbol("topic").
public class SimpleAmqpTest { [Fact] public async Task TestHelloWorld() { Address address = new Address("amqp://guest:guest@localhost:5672"); Connection connection = await Connection.Factory.CreateAsync(address); Session session = new Session(connection); Message message = new Message("Hello AMQP"); Target target = new Target { Address = "q1", Capabilities = new Symbol[] { new Symbol("queue") } }; SenderLink sender = new SenderLink(session, "sender-link", target, null); await sender.SendAsync(message); Source source = new Source { Address = "q1", Capabilities = new Symbol[] { new Symbol("queue") } }; ReceiverLink receiver = new ReceiverLink(session, "receiver-link", source, null); message = await receiver.ReceiveAsync(); receiver.Accept(message); await sender.CloseAsync(); await receiver.CloseAsync(); await session.CloseAsync(); await connection.CloseAsync(); } }
Have a look at https://github.com/Azure/amqpnetlite/issues/286, where the code comes from.
You can choose whether the default routing will be multicast or anycast by setting default-address-routing-type in broker.xml, everything documented at https://activemq.apache.org/artemis/docs/2.6.0/address-model.html
The broker's multicastPrefix and anycastPrefix feature is not implemented for AMQP. https://issues.jboss.org/browse/ENTMQBR-795
