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.server.ft.journal.ufs;
  
  import static org.junit.Assert.assertTrue;
  
  import alluxio.AlluxioURI;
  import alluxio.UnderFileSystemFactoryRegistryRule;
  import alluxio.client.file.FileSystem;
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.testutils.LocalAlluxioClusterResource;
  import alluxio.testutils.underfs.delegating.DelegatingUnderFileSystem;
  import alluxio.testutils.underfs.delegating.DelegatingUnderFileSystemFactory;
  import alluxio.underfs.UnderFileSystem;
  import alluxio.underfs.UnderFileSystem.Factory;
  import alluxio.util.CommonUtils;
  
  import com.google.common.io.Files;
  import org.junit.Before;
  import org.junit.ClassRule;
  import org.junit.Rule;
  import org.junit.Test;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.ThreadLocalRandom;
  
  /**
   * Integration test where the rename operation often fails. Makes sure the journal can recover
   * from this.
   */
  public class RenameFailureJournalTest {
    private static final String LOCAL_UFS_PATH = Files.createTempDir().getAbsolutePath();
  
    private FileSystem mFs;
  
    // An under file system which fails 90% of its renames.
    private static final UnderFileSystem UFS =
        new DelegatingUnderFileSystem(Factory.create(LOCAL_UFS_PATH, Configuration.global())) {
          @Override
          public boolean renameFile(String src, String dst) throws IOException {
            if (ThreadLocalRandom.current().nextInt(10) == 0) {
              return mUfs.renameFile(src, dst);
            } else {
              return false;
            }
          }
        };
  
    @ClassRule
    public static UnderFileSystemFactoryRegistryRule sUnderfilesystemfactoryregistry =
        new UnderFileSystemFactoryRegistryRule(new DelegatingUnderFileSystemFactory(UFS));
  
    @Rule
    public LocalAlluxioClusterResource mLocalAlluxioClusterResource =
        new LocalAlluxioClusterResource.Builder()
            .setProperty(PropertyKey.MASTER_JOURNAL_FOLDER,
                DelegatingUnderFileSystemFactory.DELEGATING_SCHEME + "://" + LOCAL_UFS_PATH)
            .setProperty(PropertyKey.MASTER_JOURNAL_LOG_SIZE_BYTES_MAX, 128)
            .setProperty(PropertyKey.MASTER_JOURNAL_FLUSH_BATCH_TIME_MS, 0)
            .setProperty(PropertyKey.MASTER_JOURNAL_FLUSH_TIMEOUT_MS, "5min")
            .setProperty(PropertyKey.MASTER_JOURNAL_FLUSH_RETRY_INTERVAL, "0")
            .build();
  
    @Before
    public void before() throws Exception {
      mFs = FileSystem.Factory.create();
    }
  
    @Test
    public void testMultiRestart() throws Exception {
      List<AlluxioURI> paths = new ArrayList<>();
      for (int i = 0; i < 3; i++) {
        AlluxioURI path = new AlluxioURI("/path" + i);
        paths.add(path);
        mFs.createDirectory(path);
        CommonUtils.sleepMs(10);
      }
      for (int i = 0; i < 3; i++) {
        mLocalAlluxioClusterResource.get().restartMasters();
        for (AlluxioURI path : paths) {
          assertTrue(mFs.exists(path));
        }
      }
    }
  }
  