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.unit.core.server.impl;
  
  import java.io.File;
  import java.nio.ByteBuffer;
  import java.nio.channels.FileChannel;
  import java.nio.file.StandardOpenOption;
  import java.util.Arrays;
  import java.util.Set;
  
  import org.apache.activemq.artemis.core.config.ha.ReplicationPrimaryPolicyConfiguration;
  import org.apache.activemq.artemis.core.server.NodeManager;
  import org.apache.activemq.artemis.core.server.impl.FileLockNodeManager;
  import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
  import org.apache.activemq.artemis.utils.UUID;
  import org.apache.activemq.artemis.utils.UUIDGenerator;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static java.util.stream.Collectors.toSet;
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class FileLockTest extends ActiveMQTestBase {
  
     @Override
     @BeforeEach
     public void setUp() throws Exception {
        super.setUp();
        File file = new File(getTestDir());
        file.mkdirs();
     }
  
     @Test
     public void testSetNodeID() throws Exception {
        FileLockNodeManager underTest = new FileLockNodeManager(getTestDirfile(), false);
        ReplicationPrimaryPolicyConfiguration replicationPrimaryPolicyConfiguration = ReplicationPrimaryPolicyConfiguration.withDefault();
        String seed = "";
        for (int i = 0; i < 20; i++) {
           replicationPrimaryPolicyConfiguration.setCoordinationId(seed);
           if (replicationPrimaryPolicyConfiguration.getCoordinationId() != null) {
              underTest.setNodeID(replicationPrimaryPolicyConfiguration.getCoordinationId());
           }
           seed += String.valueOf(i);
        }
  
        replicationPrimaryPolicyConfiguration.setCoordinationId("somme-dash-and-odd");
        if (replicationPrimaryPolicyConfiguration.getCoordinationId() != null) {
           underTest.setNodeID(replicationPrimaryPolicyConfiguration.getCoordinationId());
        }
     }
  
     @Test
     public void testNodeManagerStartPersistence() throws Exception {
        final File managerDirectory = getTestDirfile();
        FileLockNodeManager manager = new FileLockNodeManager(managerDirectory, false);
        manager.start();
        Set<File> files = Arrays.stream(managerDirectory.listFiles(pathname -> pathname.isFile())).collect(toSet());
        final Set<String> expectedFileNames = Arrays.stream(new String[]{FileLockNodeManager.SERVER_LOCK_NAME, "serverlock.1", "serverlock.2"})
           .collect(toSet());
        assertEquals(expectedFileNames, files.stream().map(File::getName).collect(toSet()));
        final File nodeIdFile = files.stream().filter(file -> file.getName().equals(FileLockNodeManager.SERVER_LOCK_NAME)).findFirst().get();
        final byte[] encodedNodeId = manager.getUUID().asBytes();
        try (FileChannel serverLock = FileChannel.open(nodeIdFile.toPath(), StandardOpenOption.READ)) {
           assertEquals(16, encodedNodeId.length);
           assertEquals(19, serverLock.size());
           final ByteBuffer readNodeId = ByteBuffer.allocate(16);
           serverLock.read(readNodeId, 3);
           readNodeId.flip();
           assertArrayEquals(encodedNodeId, readNodeId.array());
        }
        assertEquals(NodeManager.NULL_NODE_ACTIVATION_SEQUENCE, manager.getNodeActivationSequence());
        assertEquals(NodeManager.NULL_NODE_ACTIVATION_SEQUENCE, manager.readNodeActivationSequence());
        assertEquals(3, managerDirectory.listFiles(pathname -> pathname.isFile()).length);
        manager.stop();
     }
  
     @Test
     public void testReplicateBackupNodeManagerStartPersistence() throws Exception {
        final File managerDirectory = getTestDirfile();
        FileLockNodeManager manager = new FileLockNodeManager(managerDirectory, true);
        manager.start();
        Set<File> files = Arrays.stream(managerDirectory.listFiles(pathname -> pathname.isFile())).collect(toSet());
        assertTrue(files.isEmpty());
        assertNull(manager.getNodeId());
        assertNull(manager.getUUID());
        assertEquals(NodeManager.NULL_NODE_ACTIVATION_SEQUENCE, manager.getNodeActivationSequence());
        assertEquals(NodeManager.NULL_NODE_ACTIVATION_SEQUENCE, manager.readNodeActivationSequence());
        assertEquals(0, managerDirectory.listFiles(pathname -> pathname.isFile()).length);
        manager.stop();
     }
  
     @Test
     public void testReplicatedStopBackupPersistence() throws Exception {
        final FileLockNodeManager manager = new FileLockNodeManager(getTestDirfile(), false);
        manager.start();
        assertNotNull(manager.getUUID());
        manager.writeNodeActivationSequence(1);
        final long nodeActivationSequence = manager.getNodeActivationSequence();
        assertEquals(1, nodeActivationSequence);
        manager.stop();
        // replicated manager read activation sequence (if any) but ignore NodeId
        final FileLockNodeManager replicatedManager = new FileLockNodeManager(getTestDirfile(), true);
        replicatedManager.start();
        assertNull(replicatedManager.getUUID());
        assertEquals(1, replicatedManager.getNodeActivationSequence());
        UUID storedNodeId = UUIDGenerator.getInstance().generateUUID();
        replicatedManager.setNodeID(storedNodeId.toString());
        replicatedManager.setNodeActivationSequence(2);
        replicatedManager.stopBackup();
        replicatedManager.setNodeID(UUIDGenerator.getInstance().generateStringUUID());
        replicatedManager.setNodeActivationSequence(3);
        replicatedManager.stop();
        // start read whatever has been persisted by stopBackup
        manager.start();
        assertEquals(storedNodeId, manager.getUUID());
        assertEquals(2, manager.getNodeActivationSequence());
        manager.stop();
     }
  
     @Test
     public void testWriteNodeActivationSequence() throws Exception {
        final FileLockNodeManager manager = new FileLockNodeManager(getTestDirfile(), false);
        manager.start();
        UUID id = manager.getUUID();
        assertNotNull(manager.getUUID());
        manager.writeNodeActivationSequence(1);
        final long nodeActivationSequence = manager.getNodeActivationSequence();
        assertEquals(1, nodeActivationSequence);
        manager.stop();
        final FileLockNodeManager otherManager = new FileLockNodeManager(getTestDirfile(), false);
        otherManager.start();
        assertEquals(id, otherManager.getUUID());
        assertEquals(1, otherManager.getNodeActivationSequence());
        otherManager.stop();
     }
  
     @Test
     public void testNIOLock() throws Exception {
        doTestLock(new FileLockNodeManager(getTestDirfile(), false), new FileLockNodeManager(getTestDirfile(), false));
  
     }
  
     public void doTestLock(final FileLockNodeManager lockManager1,
                            final FileLockNodeManager lockManager2) throws Exception {
        lockManager1.start();
        lockManager2.start();
  
        lockManager1.startPrimaryNode();
  
        Thread t = new Thread(() -> {
           try {
              lockManager2.startPrimaryNode();
           } catch (Exception e) {
              e.printStackTrace();
           }
        });
  
        t.start();
  
        assertTrue(lockManager1.isPrimaryLocked());
        Thread.sleep(500);
        assertFalse(lockManager2.isPrimaryLocked());
  
        lockManager1.crashPrimaryServer();
  
        t.join();
  
        assertFalse(lockManager1.isPrimaryLocked());
        assertTrue(lockManager2.isPrimaryLocked());
  
        lockManager2.crashPrimaryServer();
  
        lockManager1.stop();
        lockManager2.stop();
  
     }
  
  }
  