content: /*
   * 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.integration.client;
  
  import javax.jms.Connection;
  import javax.jms.ConnectionFactory;
  import javax.jms.Message;
  import javax.jms.MessageConsumer;
  import javax.jms.MessageProducer;
  import javax.jms.Session;
  import javax.jms.Topic;
  import java.util.Map;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.CyclicBarrier;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicBoolean;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.apache.activemq.artemis.api.core.QueueConfiguration;
  import org.apache.activemq.artemis.api.core.RoutingType;
  import org.apache.activemq.artemis.core.config.CoreAddressConfiguration;
  import org.apache.activemq.artemis.core.persistence.StorageManager;
  import org.apache.activemq.artemis.core.persistence.impl.journal.JournalRecordIds;
  import org.apache.activemq.artemis.core.persistence.impl.journal.JournalStorageManager;
  import org.apache.activemq.artemis.core.server.ActiveMQServer;
  import org.apache.activemq.artemis.core.server.Queue;
  import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
  import org.apache.activemq.artemis.tests.util.CFUtil;
  import org.apache.activemq.artemis.tests.util.Wait;
  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.Assertions.assertTrue;
  
  public class RemoveSubscriptionRaceTest extends ActiveMQTestBase {
  
  
     private static final String SUB_NAME = "SubscriptionStressTest";
  
     ActiveMQServer server;
  
     @BeforeEach
     public void setServer() throws Exception {
     }
  
     @Test
     public void testCreateSubscriptionCoreNoFiles() throws Exception {
        internalTest("core", false, 5, 1000, false);
     }
  
     @Test
     public void testCreateSubscriptionAMQPNoFiles() throws Exception {
        internalTest("amqp", false, 5, 1000, false);
     }
  
     @Test
     public void testCreateSubscriptionCoreRealFiles() throws Exception {
        internalTest("core", true, 2, 200, false);
     }
  
     @Test
     public void testCreateSubscriptionAMQPRealFiles() throws Exception {
        internalTest("amqp", true, 2, 200, false);
     }
  
     @Test
     public void testCreateSubscriptionCoreRealFilesDurable() throws Exception {
        internalTest("core", true, 2, 200, true);
     }
  
     @Test
     public void testCreateSubscriptionAMQPRealFilesDurable() throws Exception {
        internalTest("amqp", true, 2, 200, true);
     }
  
     public void internalTest(String protocol, boolean realFiles, int threads, int numberOfMessages, boolean durableSub) throws Exception {
        server = createServer(realFiles, true);
        server.getConfiguration().addAddressConfiguration(new CoreAddressConfiguration().setName(SUB_NAME).addRoutingType(RoutingType.MULTICAST));
        server.getConfiguration().addQueueConfiguration(QueueConfiguration.of("Sub_1").setAddress(SUB_NAME).setRoutingType(RoutingType.MULTICAST));
        server.start();
  
        CountDownLatch runningLatch = new CountDownLatch(threads);
        AtomicBoolean running = new AtomicBoolean(true);
        AtomicInteger errors = new AtomicInteger(0);
  
        ExecutorService executorService = Executors.newFixedThreadPool(Math.max(1, threads)); // I'm using the max here, because I may set threads=0 while hacking the test
  
        runAfter(() -> executorService.shutdownNow());
  
        ConnectionFactory factory = CFUtil.createConnectionFactory(protocol, "tcp://localhost:61616");
  
        CyclicBarrier flagStart = new CyclicBarrier(threads + 1);
  
        for (int i = 0; i < threads; i++) {
           final int threadNumber = i;
           executorService.execute(() -> {
              try {
                 flagStart.await(10, TimeUnit.SECONDS);
                 for (int n = 0; n < numberOfMessages && running.get(); n++) {
                    Connection connection = factory.createConnection();
                    if (durableSub) {
                       connection.setClientID("t" + threadNumber);
                    }
                    connection.start();
                    Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
                    Topic topic = session.createTopic(SUB_NAME);
                    MessageConsumer consumer;
                    if (durableSub) {
                       consumer = session.createDurableSubscriber(topic, "t" + threadNumber);
                    } else {
                       consumer = session.createConsumer(topic);
                    }
                    Message message = consumer.receiveNoWait();
                    if (message != null) {
                       message.acknowledge();
                    }
                    consumer.close();
                    if (durableSub) {
                       session.unsubscribe("t" + threadNumber);
                    }
                    connection.close();
                 }
              } catch (Throwable e) {
                 e.printStackTrace();
                 errors.incrementAndGet();
  
              } finally {
                 runningLatch.countDown();
              }
           });
        }
  
        Connection connection = factory.createConnection();
        connection.start();
  
        Queue queue = server.locateQueue("Sub_1");
        assertNotNull(queue);
  
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Topic topic = session.createTopic(SUB_NAME);
        MessageProducer producer = session.createProducer(topic);
        MessageConsumer consumer = session.createConsumer(session.createQueue(SUB_NAME + "::" + "Sub_1"));
  
        flagStart.await(10, TimeUnit.SECONDS);
        try {
           for (int i = 0; i < numberOfMessages; i++) {
              producer.send(session.createTextMessage("a"));
              assertNotNull(consumer.receive(5000));
           }
           connection.close();
        } finally {
           running.set(false);
           assertTrue(runningLatch.await(10, TimeUnit.SECONDS));
        }
  
        Wait.assertEquals(0, this::countAddMessage, 5000, 100);
  
        Wait.assertEquals(0L, queue.getPagingStore()::getAddressSize, 2000, 100);
  
        assertEquals(0, errors.get());
     }
  
     int countAddMessage() throws Exception {
        StorageManager manager = server.getStorageManager();
  
        if (manager instanceof JournalStorageManager journalStorageManager) {
           journalStorageManager.getMessageJournal().scheduleCompactAndBlock(5_000);
        } else {
           return 0;
        }
  
        Map<Integer, AtomicInteger> journalCounts = countJournal(server.getConfiguration());
        AtomicInteger value = journalCounts.get((int) JournalRecordIds.ADD_MESSAGE_PROTOCOL);
        if (value == null) {
           return 0;
        }
        return value.get();
     }
  }
  