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   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.artemis.tests.leak;
  
  import javax.jms.Connection;
  import javax.jms.ConnectionFactory;
  import javax.jms.Destination;
  import javax.jms.Message;
  import javax.jms.MessageConsumer;
  import javax.jms.MessageProducer;
  import javax.jms.Session;
  import javax.jms.TextMessage;
  
  import io.github.checkleak.core.CheckLeak;
  import org.apache.activemq.artemis.api.core.QueueConfiguration;
  import org.apache.activemq.artemis.api.core.RoutingType;
  import org.apache.activemq.artemis.core.message.impl.CoreMessage;
  import org.apache.activemq.artemis.core.server.ActiveMQServer;
  import org.apache.activemq.artemis.core.server.impl.AddressInfo;
  import org.apache.activemq.artemis.core.server.impl.MessageReferenceImpl;
  import org.apache.activemq.artemis.core.server.impl.QueueImpl;
  import org.apache.activemq.artemis.tests.util.CFUtil;
  import org.apache.activemq.artemis.utils.RandomUtil;
  import org.apache.activemq.artemis.utils.collections.LinkedListImpl;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assumptions.assumeTrue;
  
  public class RedistributorLeakTest extends AbstractLeakTest {
  
     ActiveMQServer server;
  
     public void startServer() throws Exception {
        server = createServer(false, true);
        server.start();
     }
  
     @BeforeAll
     public static void beforeClass() throws Exception {
        assumeTrue(CheckLeak.isLoaded());
     }
  
     @Override
     @BeforeEach
     public void setUp() throws Exception {
        startServer();
     }
  
     @AfterEach
     @Override
     public void tearDown() throws Exception {
        super.tearDown();
        server = null;
     }
  
     @Test
     public void testRedistributor() throws Exception {
        CheckLeak checkLeak = new CheckLeak();
  
        final int NUMBER_OF_MESSAGES = 500;
  
        String addressName = "Queue" + RandomUtil.randomUUIDString();
        server.addAddressInfo(new AddressInfo(addressName).addRoutingType(RoutingType.ANYCAST));
        QueueImpl queue = (QueueImpl) server.createQueue(QueueConfiguration.of(addressName).setRoutingType(RoutingType.ANYCAST));
  
        ConnectionFactory factory = CFUtil.createConnectionFactory("core", "tcp://localhost:61616");
        try (Connection connection = factory.createConnection()) {
           Session session = connection.createSession(true, Session.SESSION_TRANSACTED);
           MessageProducer producer = session.createProducer(session.createQueue(addressName));
           for (int i = 0; i < NUMBER_OF_MESSAGES; i++) {
              Message message = session.createTextMessage("hello " + i);
              message.setJMSPriority(1 + (i % 5));
              producer.send(message);
           }
           session.commit();
  
           Destination jmsQueue = session.createQueue(addressName);
  
           connection.start();
  
           // creating one consumer per messages, just for part of the messages sent
           for (int i = 0; i < NUMBER_OF_MESSAGES / 10; i++) {
              MessageConsumer consumer = session.createConsumer(jmsQueue);
              Message message = consumer.receive(1000);
              assertNotNull(message);
              queue.flushExecutor();
              consumer.close();
           }
           session.rollback();
        }
  
        int numberOfIterators = checkLeak.getAllObjects(LinkedListImpl.Iterator.class).length;
        assertEquals(0, numberOfIterators);
  
        // Adding and cancelling a few redistributors
        for (int i = 0; i < 10; i++) {
           queue.addRedistributor(0);
           queue.flushExecutor();
           queue.cancelRedistributor();
           queue.flushExecutor();
        }
  
        numberOfIterators = checkLeak.getAllObjects(LinkedListImpl.Iterator.class).length;
        assertEquals(0, numberOfIterators, "Redistributors are leaking " + LinkedListImpl.Iterator.class.getName());
  
        try (Connection connection = factory.createConnection()) {
           Session session = connection.createSession(true, Session.SESSION_TRANSACTED);
           Destination destination = session.createQueue(addressName);
           connection.start();
           MessageConsumer consumer = session.createConsumer(destination);
           for (int i = 0; i < NUMBER_OF_MESSAGES; i++) {
              TextMessage message = (TextMessage) consumer.receive(1000);
              assertNotNull(message);
              assertEquals("hello " + i, message.getText());
           }
           session.commit();
        }
  
        assertEquals(0, checkLeak.getAllObjects(MessageReferenceImpl.class).length);
        assertEquals(0, checkLeak.getAllObjects(CoreMessage.class).length);
     }
  
  }