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https://issues.apache.org/jira/browse/ARTEMIS-4787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17850847#comment-17850847
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Justin Bertram commented on ARTEMIS-4787:
-----------------------------------------
The {{multicastPrefix}} and {{anycastPrefix}} settings are used to deduce the
routing type based on the prefix already in use by the clients. For example,
clients using names {{topic/foo}} and {{queue/bar}} will get multicast or
anycast semantics respectively when using {{multicastPrefix=topic/}} and
{{anycastPrefix=queue/}}. It won't _add_ a prefix as required for your use-case.
Off the top of my head, the only way I can think of to do something like this
is with a [broker
plugin|https://activemq.apache.org/components/artemis/documentation/latest/broker-plugins.html#plugin-support],
specifically an [address
plugin|https://github.com/apache/activemq-artemis/blob/main/artemis-server/src/main/java/org/apache/activemq/artemis/core/server/plugin/ActiveMQServerAddressPlugin.java]
and/or a [queue
plugin|https://github.com/apache/activemq-artemis/blob/main/artemis-server/src/main/java/org/apache/activemq/artemis/core/server/plugin/ActiveMQServerQueuePlugin.java].
I'm not familiar with the details of your use-case so I'm not 100% sure it
will do what you need, but it's my best guess at this point.
> Anycast queue does not auto-create if already multicast queue on same address
> -----------------------------------------------------------------------------
>
> Key: ARTEMIS-4787
> URL: https://issues.apache.org/jira/browse/ARTEMIS-4787
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Components: Broker
> Reporter: Josh Byster
> Priority: Major
>
> As a preface, I am aware that creating both anycast and multicast queues on
> the same address is an anti-pattern and not recommended. However, this is
> causing difficulties migrating over legacy clients from using Classic to
> Artemis.
> If one creates a JMS topic on an address, and then tries to create a JMS
> queue, it fails to create. However, if the order is flipped (creating a
> queue, then a topic), there is no exception.
> It seems like the issue is in this area of ServerSessionImpl:
> {code:java}
> Bindings bindings =
> server.getPostOffice().lookupBindingsForAddress(unPrefixedAddress);
> if (bindings != null && bindings.hasLocalBinding() &&
> !queueConfig.isFqqn()) {
> // The address has another queue with a different name, which
> is fine. Just ignore it.
> result = AutoCreateResult.EXISTED;
> {code}
> Please see test below to reproduce, which throws the exception immediately as
> seen in production.
> {code:java}
> package org.apache.activemq.artemis.tests.integration;
> import org.apache.activemq.artemis.api.core.client.ClientSession;
> import org.apache.activemq.artemis.api.core.client.ClientSessionFactory;
> import org.apache.activemq.artemis.api.core.client.ServerLocator;
> import org.apache.activemq.artemis.core.server.ActiveMQServer;
> import org.apache.activemq.artemis.core.settings.impl.AddressSettings;
> import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
> import org.junit.Before;
> import org.junit.Test;
> import javax.jms.Connection;
> import javax.jms.ConnectionFactory;
> import javax.jms.MessageConsumer;
> import javax.jms.Queue;
> import javax.jms.Session;
> import javax.jms.Topic;
> import java.util.HashMap;
> public class QueueTopicSameNameTest extends ActiveMQTestBase {
> protected ActiveMQServer server;
> protected ClientSession session;
> protected ClientSessionFactory sf;
> protected ServerLocator locator;
> @Override
> @Before
> public void setUp() throws Exception {
> super.setUp();
> server = createServer(true, createDefaultNettyConfig(),
> AddressSettings.DEFAULT_PAGE_SIZE, AddressSettings.DEFAULT_MAX_SIZE_BYTES,
> -1, -1, new HashMap<>());
> server.start();
> locator = createInVMNonHALocator();
> sf = createSessionFactory(locator);
> session = addClientSession(sf.createSession(false, true, true));
> }
> @Test
> public void testTopicThenQueueCreate() throws Exception {
> String myAddr = "TEST";
> ConnectionFactory cf = new
> org.apache.activemq.ActiveMQConnectionFactory("failover:(tcp://localhost:61616)");
> Connection c = cf.createConnection();
> Session s = c.createSession();
> Topic t = s.createTopic(myAddr);
> MessageConsumer consumer = s.createConsumer(t);
> Queue q = s.createQueue(myAddr);
> MessageConsumer otherConsumer = s.createConsumer(q);
> c.close();
> }
> }
> {code}
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