To help with the development of Virtual Topics I've added a test case to confirm that destinations are lazily created when a consumer is created. For more background see the dev thread: http://www.nabble.com/Re%3A-Virtual-Topics-%28was-Re%3A-Failover-topic-subscribers%29-tf1942508.html#a5404863

git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/trunk@423755 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/test/java/org/apache/activemq/usecases/NewConsumerCreatesDestinationTest.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2005-2006 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.usecases;
+
+import org.apache.activemq.EmbeddedBrokerTestSupport;
+import org.apache.activemq.command.ActiveMQDestination;
+import org.apache.activemq.command.ActiveMQQueue;
+
+import javax.jms.Connection;
+import javax.jms.Destination;
+import javax.jms.Session;
+
+import java.util.Set;
+
+/**
+ * 
+ * @version $Revision: $
+ */
+public class NewConsumerCreatesDestinationTest extends EmbeddedBrokerTestSupport {
+
+    private Connection connection;
+    private ActiveMQQueue wildcard;
+    
+    public void testNewConsumerCausesNewDestinationToBeAutoCreated() throws Exception {
+        connection = createConnection();
+
+        // lets create a wildcard thats kinda like those used by Virtual Topics
+        String wildcardText = "org.*" + getDestinationString().substring("org.apache".length());
+        wildcard = new ActiveMQQueue(wildcardText);
+
+        System.out.println("Using wildcard: " + wildcard);
+        System.out.println("on destination: " + destination);
+        
+        assertDestinationCreated(destination, false);
+        assertDestinationCreated(wildcard, false);
+        
+        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
+        session.createConsumer(destination);
+
+        assertDestinationCreated(destination, true);
+        assertDestinationCreated(wildcard, true);
+    }
+
+    protected void tearDown() throws Exception {
+        if (connection != null) {
+            connection.close();
+        }
+        super.tearDown();
+    }
+
+    protected void assertDestinationCreated(Destination destination, boolean expected) throws Exception {
+        Set answer = broker.getBroker().getDestinations((ActiveMQDestination) destination);
+        int size = expected ? 1 : 0;
+        assertEquals("Size of found destinations: " + answer, size, answer.size());
+    }
+}