content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.client.cli.fsadmin;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotEquals;
  import static org.junit.Assert.assertTrue;
  
  import alluxio.AlluxioURI;
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.exception.AlluxioException;
  import alluxio.exception.ExceptionMessage;
  import alluxio.master.MasterContext;
  import alluxio.master.MasterProcess;
  import alluxio.master.StateLockManager;
  import alluxio.master.StateLockOptions;
  import alluxio.resource.LockResource;
  import alluxio.testutils.LocalAlluxioClusterResource;
  
  import org.junit.Test;
  import org.powermock.reflect.Whitebox;
  
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  
  /**
   * Integration tests for the backup command's interaction with the state-locking.
   */
  @LocalAlluxioClusterResource.ServerConfig(confParams = {
      PropertyKey.Name.MASTER_BACKUP_DIRECTORY, "${alluxio.work.dir}/backups",
      PropertyKey.Name.MASTER_SHELL_BACKUP_STATE_LOCK_TRY_DURATION, "3s",
      PropertyKey.Name.MASTER_SHELL_BACKUP_STATE_LOCK_TIMEOUT, "3s",
      PropertyKey.Name.MASTER_SHELL_BACKUP_STATE_LOCK_GRACE_MODE, "TIMEOUT"})
  public final class BackupCommandStateLockingIntegrationTest extends AbstractFsAdminShellTest {
    @Test
    public void timeoutWhenStateLockAcquired() throws Exception {
      // Grab the master state-lock-manager via reflection.
      MasterProcess masterProcess =
          Whitebox.getInternalState(mLocalAlluxioCluster.getLocalAlluxioMaster(), "mMasterProcess");
      MasterContext masterCtx = Whitebox.getInternalState(masterProcess, "mContext");
      StateLockManager stateLockManager = masterCtx.getStateLockManager();
  
      // Lock the state-change lock on the master before initiating the backup.
      try (LockResource lr = stateLockManager.lockExclusive(StateLockOptions.defaults())) {
        // Prepare for a backup.
        Path dir = Paths.get(Configuration.getString(PropertyKey.MASTER_BACKUP_DIRECTORY));
        Files.createDirectories(dir);
        assertEquals(0, Files.list(dir).count());
        // Initiate backup. It should fail.
        int errCode = mFsAdminShell.run("backup");
        assertTrue(mOutput.toString().contains(ExceptionMessage.STATE_LOCK_TIMED_OUT
            .getMessage(3000/* matching the cluster resource configuration. */)));
        assertNotEquals(0, errCode);
      }
    }
  
    @Test
    public void takeBackupDuringExclusiveOnlyPhase() throws Exception {
      // Grab the master state-lock-manager via reflection.
      MasterProcess masterProcess =
          Whitebox.getInternalState(mLocalAlluxioCluster.getLocalAlluxioMaster(), "mMasterProcess");
      MasterContext masterCtx = Whitebox.getInternalState(masterProcess, "mContext");
      StateLockManager stateLockManager = masterCtx.getStateLockManager();
  
      // Activate exclusive-only phase via reflection.
      // Cannot make via cluster property due to lack of support from test utilities.
      long exclusiveOnlyDurationMs = 30000;
      Whitebox.setInternalState(stateLockManager, "mExclusiveOnlyDeadlineMs",
          System.currentTimeMillis() + exclusiveOnlyDurationMs);
  
      try {
        // getStatus() should fail during exclusive-only phase.
        mException.expect(AlluxioException.class);
        mLocalAlluxioCluster.getClient().getStatus(new AlluxioURI("/"));
        // Prepare for a backup.
        Path dir = Paths.get(Configuration.getString(PropertyKey.MASTER_BACKUP_DIRECTORY));
        Files.createDirectories(dir);
        assertEquals(0, Files.list(dir).count());
        // Take the backup. It should be allowed.
        int errCode = mFsAdminShell.run("backup");
        assertEquals("", mErrOutput.toString());
        assertEquals(0, errCode);
        assertEquals(1, Files.list(dir).count());
      } finally {
        // Reset exclusive-only phase.
        Whitebox.setInternalState(stateLockManager, "mExclusiveOnlyDeadlineMs", -1);
      }
    }
  }
  