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

Question

此问题是关于在中使用AMQP消费消息。网文档建议使用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，地址和队列将自动创建。不过，自动创建的队列总是“单播”。我无法自动创建

1. 多播队列
2. 这允许任何数量的消费者

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;
}

也许我错过了一些旗帜？

Answer 1

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

该功能应该是new Symbol（“队列”）或new Symbol（“主题”）。

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，代码的来源。

您可以通过在broker.xml中设置默认路由是多播还是任意广播来选择默认路由，所有内容都记录在https://activemq.apache.org/artemis/docs/2.6.0/address-model.html

代理的multicastPrefix和anycastPrefix功能没有为AMQP实现。https://issues.jboss.org/browse/ENTMQBR-795