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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.unit.core.journal.impl;
  
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.util.LinkedList;
  import java.util.concurrent.BlockingDeque;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.LinkedBlockingDeque;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import org.apache.activemq.artemis.core.journal.impl.JournalFile;
  import org.apache.activemq.artemis.core.journal.impl.JournalFilesRepository;
  import org.apache.activemq.artemis.core.journal.impl.JournalImpl;
  import org.apache.activemq.artemis.tests.unit.core.journal.impl.fakes.FakeSequentialFileFactory;
  import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
  import org.apache.activemq.artemis.utils.ActiveMQThreadFactory;
  import org.apache.activemq.artemis.utils.Wait;
  import org.apache.activemq.artemis.utils.actors.OrderedExecutorFactory;
  import org.junit.jupiter.api.Test;
  
  public class JournalFileRepositoryOrderTest extends ActiveMQTestBase {
  
     @Test
     public void testOrder() throws Throwable {
        ExecutorService executorService = Executors.newFixedThreadPool(3, new ActiveMQThreadFactory("test", false, JournalFileRepositoryOrderTest.class.getClassLoader()));
        final AtomicBoolean running = new AtomicBoolean(true);
        Thread t = null;
        try {
           FakeSequentialFileFactory fakeSequentialFileFactory = new FakeSequentialFileFactory();
           JournalImpl journal = new JournalImpl(new OrderedExecutorFactory(executorService), 10 * 1024, 2, -1, -1, 0, fakeSequentialFileFactory, "file", "file", 1, 0);
  
           final JournalFilesRepository repository = journal.getFilesRepository();
           final BlockingDeque<JournalFile> dataFiles = new LinkedBlockingDeque<>();
  
  
           // this is simulating how compating would return files into the journal
           t = new Thread(() -> {
              while (running.get()) {
                 try {
                    Wait.waitFor(() -> !running.get() || dataFiles.size() > 10, 1000, 1);
                    while (running.get()) {
                       JournalFile file = dataFiles.poll();
                       if (file == null) break;
                       repository.addFreeFile(file, false);
                    }
                 } catch (Throwable e) {
                    e.printStackTrace();
                 }
              }
           });
           t.start();
           JournalFile file = null;
           LinkedList<Integer> values = new LinkedList<>();
           for (int i = 0; i < 5000; i++) {
              file = repository.openFile();
              assertNotNull(file);
              values.add(file.getRecordID());
              dataFiles.push(file);
           }
  
           int previous = Integer.MIN_VALUE;
           for (Integer v : values) {
              assertTrue(v.intValue() > previous);
              previous = v;
           }
  
        } finally {
           running.set(false);
           executorService.shutdownNow();
        }
  
     }
  }
  