AMQPNETLITE - ActiveMQ Artemis (Red Hat AMQ) - 自动创建多消费者多播队列

Question

这个问题是在 .Net 中使用 AMQP 来消费消息。文档推荐使用 amqpnetlite:https://access.redhat.com/documentation/en-us/red_hat_amq/7.0/html-single/using_the_amq_.net_client/index

使用 AMQPNetLite 订阅地址时，将自动创建地址和队列。不过，自动创建的队列始终是“单播”的。我无法自动创建

多播队列

这允许任意数量的消费者。

代码:

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;
}

也许我错过了一些标志？

Answer 1

在 AMQP 中，您可以通过设置功能在自动创建队列(任播路由)或主题(多播路由)之间进行选择。

能力应该是 new Symbol("queue")或 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();
    }
}

看看https://github.com/Azure/amqpnetlite/issues/286 ，代码来自哪里。

您可以通过设置 default-address-routing-type 来选择默认路由是多播还是任播。在 broker.xml 中，所有内容都记录在 https://activemq.apache.org/artemis/docs/2.6.0/address-model.html

经纪人的multicastPrefix和 anycastPrefix未为 AMQP 实现功能。 https://issues.jboss.org/browse/ENTMQBR-795