Пример #1
0
  @Test
  public void testChunkCache() throws IOException {
    Database database = new Database();

    // Round 1: Add chunk to new database version, then add database version
    DatabaseVersion databaseVersion1 = TestDatabaseUtil.createDatabaseVersion();

    ChunkEntry chunkA1 = new ChunkEntry(new byte[] {1, 2, 3, 4, 5, 7, 8, 9, 0}, 12);
    databaseVersion1.addChunk(chunkA1);

    database.addDatabaseVersion(databaseVersion1);
    assertEquals(chunkA1, database.getChunk(new byte[] {1, 2, 3, 4, 5, 7, 8, 9, 0}));

    // Round 2: Add chunk to new database version, then add database version
    DatabaseVersion databaseVersion2 = TestDatabaseUtil.createDatabaseVersion(databaseVersion1);

    ChunkEntry chunkA2 = new ChunkEntry(new byte[] {9, 8, 7, 6, 5, 4, 3, 2, 1}, 112);
    databaseVersion2.addChunk(chunkA2);

    database.addDatabaseVersion(databaseVersion2);
    assertEquals(chunkA1, database.getChunk(new byte[] {1, 2, 3, 4, 5, 7, 8, 9, 0}));
    assertEquals(chunkA2, database.getChunk(new byte[] {9, 8, 7, 6, 5, 4, 3, 2, 1}));

    // Round 3: Add chunk to new database version, then add database version
    DatabaseVersion databaseVersion3 = TestDatabaseUtil.createDatabaseVersion(databaseVersion2);

    ChunkEntry chunkA3 = new ChunkEntry(new byte[] {1, 1, 1, 1, 1, 1, 1, 1, 1}, 192);
    databaseVersion3.addChunk(chunkA3);

    database.addDatabaseVersion(databaseVersion3);
    assertEquals(chunkA1, database.getChunk(new byte[] {1, 2, 3, 4, 5, 7, 8, 9, 0}));
    assertEquals(chunkA2, database.getChunk(new byte[] {9, 8, 7, 6, 5, 4, 3, 2, 1}));
    assertEquals(chunkA3, database.getChunk(new byte[] {1, 1, 1, 1, 1, 1, 1, 1, 1}));
  }
Пример #2
0
  private void initOperationVariables() throws Exception {
    localDatabase = (localDatabase != null) ? localDatabase : loadLocalDatabase();
    localBranch = localDatabase.getBranch();

    transferManager = config.getConnection().createTransferManager();
    databaseReconciliator = new DatabaseReconciliator();
  }
Пример #3
0
  @Test
  public void testMultiChunkCache() throws IOException {
    Database database = new Database();

    // Round 1: Add chunk to multichunk
    DatabaseVersion databaseVersion1 = TestDatabaseUtil.createDatabaseVersion();

    MultiChunkEntry multiChunkP1 = new MultiChunkEntry(new byte[] {8, 8, 8, 8, 8, 8, 8, 8});
    ChunkEntry chunkA1 = new ChunkEntry(new byte[] {1, 2, 3, 4, 5, 7, 8, 9, 0}, 12);

    multiChunkP1.addChunk(new ChunkEntryId(chunkA1.getChecksum()));
    databaseVersion1.addChunk(chunkA1);
    databaseVersion1.addMultiChunk(multiChunkP1);

    database.addDatabaseVersion(databaseVersion1);

    assertEquals(chunkA1, database.getChunk(new byte[] {1, 2, 3, 4, 5, 7, 8, 9, 0}));
    assertEquals(multiChunkP1, database.getMultiChunk(new byte[] {8, 8, 8, 8, 8, 8, 8, 8}));

    // Round 2: Add chunk to multichunk
    DatabaseVersion databaseVersion2 = TestDatabaseUtil.createDatabaseVersion(databaseVersion1);

    MultiChunkEntry multiChunkP2 = new MultiChunkEntry(new byte[] {7, 7, 7, 7, 7, 7, 7, 7, 7});
    MultiChunkEntry multiChunkP3 = new MultiChunkEntry(new byte[] {5, 5, 5, 5, 5, 5, 5, 5, 5});

    ChunkEntry chunkA2 = new ChunkEntry(new byte[] {9, 2, 3, 4, 5, 7, 8, 9, 0}, 912);
    ChunkEntry chunkA3 = new ChunkEntry(new byte[] {8, 2, 3, 4, 5, 7, 8, 9, 0}, 812);
    ChunkEntry chunkA4 = new ChunkEntry(new byte[] {7, 2, 3, 4, 5, 7, 8, 9, 0}, 712);

    multiChunkP2.addChunk(new ChunkEntryId(chunkA2.getChecksum()));
    multiChunkP2.addChunk(new ChunkEntryId(chunkA3.getChecksum()));
    multiChunkP3.addChunk(new ChunkEntryId(chunkA4.getChecksum()));

    databaseVersion2.addChunk(chunkA2);
    databaseVersion2.addChunk(chunkA3);
    databaseVersion2.addChunk(chunkA4);

    databaseVersion2.addMultiChunk(multiChunkP2);
    databaseVersion2.addMultiChunk(multiChunkP3);

    database.addDatabaseVersion(databaseVersion2);

    // fail("xx");

    assertEquals(chunkA1, database.getChunk(new byte[] {1, 2, 3, 4, 5, 7, 8, 9, 0}));
    assertEquals(chunkA2, database.getChunk(new byte[] {9, 2, 3, 4, 5, 7, 8, 9, 0}));
    assertEquals(chunkA3, database.getChunk(new byte[] {8, 2, 3, 4, 5, 7, 8, 9, 0}));
    assertEquals(chunkA4, database.getChunk(new byte[] {7, 2, 3, 4, 5, 7, 8, 9, 0}));
    assertEquals(multiChunkP1, database.getMultiChunk(new byte[] {8, 8, 8, 8, 8, 8, 8, 8}));
    assertEquals(multiChunkP2, database.getMultiChunk(new byte[] {7, 7, 7, 7, 7, 7, 7, 7, 7}));
    assertEquals(multiChunkP3, database.getMultiChunk(new byte[] {5, 5, 5, 5, 5, 5, 5, 5, 5}));
  }
Пример #4
0
  private void applyWinnersBranch(Branch winnersBranch, List<File> unknownRemoteDatabasesInCache)
      throws Exception {
    Branch winnersApplyBranch =
        databaseReconciliator.findWinnersApplyBranch(localBranch, winnersBranch);
    logger.log(Level.INFO, "- Database versions to APPLY locally: " + winnersApplyBranch);

    if (winnersApplyBranch.size() == 0) {
      logger.log(Level.WARNING, "  + Nothing to update. Nice!");
      result.setResultCode(DownResultCode.OK_NO_REMOTE_CHANGES);
    } else {
      logger.log(Level.INFO, "- Loading winners database ...");
      Database winnersDatabase =
          readWinnersDatabase(winnersApplyBranch, unknownRemoteDatabasesInCache);

      FileSystemActionReconciliator actionReconciliator =
          new FileSystemActionReconciliator(config, localDatabase, result);
      List<FileSystemAction> actions =
          actionReconciliator.determineFileSystemActions(winnersDatabase);

      Set<MultiChunkEntry> unknownMultiChunks =
          determineRequiredMultiChunks(actions, winnersDatabase);
      downloadAndDecryptMultiChunks(unknownMultiChunks);

      applyFileSystemActions(actions);

      // Add winners database to local database
      // Note: This must happen AFTER the file system stuff, because we compare the winners database
      // with the local database!
      for (DatabaseVersionHeader applyDatabaseVersionHeader : winnersApplyBranch.getAll()) {
        logger.log(
            Level.INFO,
            "   + Applying database version " + applyDatabaseVersionHeader.getVectorClock());

        DatabaseVersion applyDatabaseVersion =
            winnersDatabase.getDatabaseVersion(applyDatabaseVersionHeader.getVectorClock());
        localDatabase.addDatabaseVersion(applyDatabaseVersion);
      }

      logger.log(Level.INFO, "- Saving local database to " + config.getDatabaseFile() + " ...");
      saveLocalDatabase(localDatabase, config.getDatabaseFile());

      result.setResultCode(DownResultCode.OK_WITH_REMOTE_CHANGES);
    }
  }
Пример #5
0
  @Test
  public void testContentChecksumCache() throws IOException {
    Database database = new Database();

    // Round 1: Add file history & version
    DatabaseVersion databaseVersion1 = TestDatabaseUtil.createDatabaseVersion();

    // - history 1, version 1
    FileVersion fileVersion1 = TestDatabaseUtil.createFileVersion("samechecksum1.jpg");
    fileVersion1.setChecksum(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0});

    PartialFileHistory fileHistory1 = new PartialFileHistory(11111111111111111L);

    databaseVersion1.addFileHistory(fileHistory1);
    databaseVersion1.addFileVersionToHistory(fileHistory1.getFileId(), fileVersion1);

    database.addDatabaseVersion(databaseVersion1);

    assertNotNull(database.getFileHistories(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0}));
    assertEquals(1, database.getFileHistories(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0}).size());

    // Round 2: Add two other versions with same checksum to new database version
    DatabaseVersion databaseVersion2 = TestDatabaseUtil.createDatabaseVersion(databaseVersion1);

    // - history 1, version 2
    FileVersion fileVersion11 =
        TestDatabaseUtil.createFileVersion("samechecksum2-renamed.jpg", fileVersion1);
    fileVersion11.setChecksum(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0}); // same checksum!
    fileVersion11.setStatus(FileStatus.RENAMED);

    PartialFileHistory fileHistory11 =
        new PartialFileHistory(11111111111111111L); // same ID as above	

    databaseVersion2.addFileHistory(fileHistory11);
    databaseVersion2.addFileVersionToHistory(fileHistory11.getFileId(), fileVersion11);

    // - history 2, version 1
    FileVersion fileVersion2 = TestDatabaseUtil.createFileVersion("samechecksum2.jpg");
    fileVersion2.setChecksum(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0}); // same checksum!

    PartialFileHistory fileHistory2 = new PartialFileHistory(22222222222222222L); // different ID	

    databaseVersion2.addFileHistory(fileHistory2);
    databaseVersion2.addFileVersionToHistory(fileHistory2.getFileId(), fileVersion2);

    // - history 3, version 1
    FileVersion fileVersion3 = TestDatabaseUtil.createFileVersion("samechecksum3.jpg");
    fileVersion3.setChecksum(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0}); // same checksum!

    PartialFileHistory fileHistory3 = new PartialFileHistory(33333333333333333L); // different ID	

    databaseVersion2.addFileHistory(fileHistory3);
    databaseVersion2.addFileVersionToHistory(fileHistory3.getFileId(), fileVersion3);

    database.addDatabaseVersion(databaseVersion2);

    assertNotNull(database.getFileHistories(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0}));
    assertEquals(3, database.getFileHistories(new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9, 0}).size());
  }
Пример #6
0
  @Test
  public void testFilenameCache() throws IOException {
    Database database = new Database();

    // Round 1: Add file history & version
    DatabaseVersion databaseVersion1 = TestDatabaseUtil.createDatabaseVersion();

    FileVersion fileVersion1 = TestDatabaseUtil.createFileVersion("file1.jpg");
    PartialFileHistory fileHistory1 = new PartialFileHistory(11111111111111111L);

    databaseVersion1.addFileHistory(fileHistory1);
    databaseVersion1.addFileVersionToHistory(fileHistory1.getFileId(), fileVersion1);

    database.addDatabaseVersion(databaseVersion1);

    assertEquals(fileHistory1, database.getFileHistory("file1.jpg"));

    // Round 2: Add new version
    DatabaseVersion databaseVersion2 = TestDatabaseUtil.createDatabaseVersion(databaseVersion1);

    FileVersion fileVersion2 = TestDatabaseUtil.createFileVersion("file2.jpg", fileVersion1);
    PartialFileHistory fileHistory2 = new PartialFileHistory(11111111111111111L); // same ID	

    databaseVersion2.addFileHistory(fileHistory2);
    databaseVersion2.addFileVersionToHistory(fileHistory2.getFileId(), fileVersion2);

    database.addDatabaseVersion(databaseVersion2);

    assertNotNull(database.getFileHistory("file2.jpg"));
    assertEquals(2, database.getFileHistory("file2.jpg").getFileVersions().size());
    assertNull(database.getFileHistory("file1.jpg"));

    // Round 3: Add deleted version
    DatabaseVersion databaseVersion3 = TestDatabaseUtil.createDatabaseVersion(databaseVersion2);

    FileVersion fileVersion3 = TestDatabaseUtil.createFileVersion("file2.jpg", fileVersion2);
    fileVersion3.setStatus(FileStatus.DELETED);

    PartialFileHistory fileHistory3 = new PartialFileHistory(11111111111111111L); // same ID	

    databaseVersion3.addFileHistory(fileHistory3);
    databaseVersion3.addFileVersionToHistory(fileHistory3.getFileId(), fileVersion3);

    database.addDatabaseVersion(databaseVersion3);

    assertNull(database.getFileHistory("file2.jpg"));
  }
Пример #7
0
  private void initOperationVariables() throws Exception {
    localDatabase =
        (localDatabase != null)
            ? localDatabase
            : ((LoadDatabaseOperationResult) new LoadDatabaseOperation(config).execute())
                .getDatabase();

    localBranch = localDatabase.getBranch();

    transferManager = config.getConnection().createTransferManager();
    databaseReconciliator = new DatabaseReconciliator();
  }
Пример #8
0
  private Collection<MultiChunkEntry> determineMultiChunksToDownload(
      FileVersion fileVersion, Database localDatabase, Database winnersDatabase) {
    Set<MultiChunkEntry> multiChunksToDownload = new HashSet<MultiChunkEntry>();

    FileContent winningFileContent = localDatabase.getContent(fileVersion.getChecksum());

    if (winningFileContent == null) {
      winningFileContent = winnersDatabase.getContent(fileVersion.getChecksum());
    }

    boolean winningFileHasContent = winningFileContent != null;

    if (winningFileHasContent) { // File can be empty!
      Collection<ChunkEntryId> fileChunks =
          winningFileContent
              .getChunks(); // TODO [medium] Instead of just looking for multichunks to download
      // here, we should look for chunks in local files as well and return the
      // chunk positions in the local files ChunkPosition (chunk123 at file12,
      // offset 200, size 250)

      for (ChunkEntryId chunkChecksum : fileChunks) {
        MultiChunkEntry multiChunkForChunk = localDatabase.getMultiChunkForChunk(chunkChecksum);

        if (multiChunkForChunk == null) {
          multiChunkForChunk = winnersDatabase.getMultiChunkForChunk(chunkChecksum);
        }

        if (!multiChunksToDownload.contains(multiChunkForChunk)) {
          logger.log(
              Level.INFO,
              "  + Adding multichunk "
                  + StringUtil.toHex(multiChunkForChunk.getId())
                  + " to download list ...");
          multiChunksToDownload.add(multiChunkForChunk);
        }
      }
    }

    return multiChunksToDownload;
  }
Пример #9
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  public OperationResult execute() throws Exception {
    logger.log(Level.INFO, "");
    logger.log(Level.INFO, "Running 'Log' at client " + config.getMachineName() + " ...");
    logger.log(Level.INFO, "--------------------------------------------");

    Database database = loadLocalDatabase();
    DatabaseVersion currentDatabaseVersion = database.getLastDatabaseVersion();

    if (currentDatabaseVersion == null) {
      throw new Exception("No database versions yet locally. Nothing to show here.");
    }

    List<PartialFileHistory> fileHistories = null;

    if (options.getPaths().isEmpty()) {
      fileHistories = new ArrayList<PartialFileHistory>(database.getFileHistories());
    } else {
      fileHistories = getFileHistoriesByPath(options.getPaths(), database);
    }

    return new LogOperationResult(fileHistories, options.getFormat());
  }
Пример #10
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  private void pruneConflictingLocalBranch(Branch winnersBranch) throws Exception {
    Branch localPruneBranch =
        databaseReconciliator.findLosersPruneBranch(localBranch, winnersBranch);
    logger.log(Level.INFO, "- Database versions to REMOVE locally: " + localPruneBranch);

    if (localPruneBranch.size() == 0) {
      logger.log(Level.INFO, "  + Nothing to prune locally. No conflicts. Only updates. Nice!");
    } else {
      // Load dirty database (if existent)
      logger.log(Level.INFO, "  + Pruning databases locally ...");
      Database dirtyDatabase = new Database();

      for (DatabaseVersionHeader databaseVersionHeader : localPruneBranch.getAll()) {
        // Database version
        DatabaseVersion databaseVersion =
            localDatabase.getDatabaseVersion(databaseVersionHeader.getVectorClock());
        dirtyDatabase.addDatabaseVersion(databaseVersion);

        // Remove database version locally
        logger.log(Level.INFO, "    * Removing " + databaseVersionHeader + " ...");
        localDatabase.removeDatabaseVersion(databaseVersion);

        DatabaseRemoteFile remoteFileToPrune =
            new DatabaseRemoteFile(
                "db-"
                    + config.getMachineName()
                    + "-"
                    + databaseVersionHeader.getVectorClock().get(config.getMachineName()));
        logger.log(Level.INFO, "    * Deleting remote database file " + remoteFileToPrune + " ...");
        transferManager.delete(remoteFileToPrune);
      }

      logger.log(
          Level.INFO, "    * Saving dirty database to " + config.getDirtyDatabaseFile() + " ...");
      saveLocalDatabase(dirtyDatabase, config.getDirtyDatabaseFile());
    }
  }
Пример #11
0
  private Branches readUnknownDatabaseVersionHeaders(List<File> remoteDatabases)
      throws IOException {
    logger.log(Level.INFO, "Loading database headers, creating branches ...");
    // Sort files (db-a-1 must be before db-a-2 !)
    Collections.sort(
        remoteDatabases); // TODO [medium] natural sort is a workaround, database file names should
    // be centrally managed, db-name-0000000009 avoids natural sort

    // Read database files
    Branches unknownRemoteBranches = new Branches();
    DatabaseDAO dbDAO = new XmlDatabaseDAO(config.getTransformer());

    for (File remoteDatabaseFileInCache : remoteDatabases) {
      Database remoteDatabase =
          new Database(); // Database cannot be reused, since these might be different clients

      RemoteDatabaseFile remoteDatabaseFile = new RemoteDatabaseFile(remoteDatabaseFileInCache);
      dbDAO.load(
          remoteDatabase,
          remoteDatabaseFile
              .getFile()); // TODO [medium] Performance: This is very, very, very inefficient, DB is
      // loaded and then discarded
      List<DatabaseVersion> remoteDatabaseVersions = remoteDatabase.getDatabaseVersions();

      // Populate branches
      Branch remoteClientBranch =
          unknownRemoteBranches.getBranch(remoteDatabaseFile.getClientName(), true);

      for (DatabaseVersion remoteDatabaseVersion : remoteDatabaseVersions) {
        DatabaseVersionHeader header = remoteDatabaseVersion.getHeader();
        remoteClientBranch.add(header);
      }
    }

    return unknownRemoteBranches;
  }
Пример #12
0
  private List<PartialFileHistory> getFileHistoriesByPath(
      List<String> filePaths, Database database) {
    List<PartialFileHistory> fileHistories = new ArrayList<PartialFileHistory>();

    for (String filePath : filePaths) {
      PartialFileHistory fileHistory = database.getFileHistory(filePath);

      if (fileHistory != null) {
        fileHistories.add(fileHistory);
      } else {
        logger.log(Level.INFO, "Cannot find file history for file " + filePath);
      }
    }

    return fileHistories;
  }
Пример #13
0
  @Test
  public void testFilenameCacheDeleteAndNewOfSameFileInOneDatabaseVersion() throws IOException {
    Database database = new Database();

    // Round 1: Add file history & version
    DatabaseVersion databaseVersion1 = TestDatabaseUtil.createDatabaseVersion();

    FileVersion fileVersion1 = TestDatabaseUtil.createFileVersion("file1.jpg");
    PartialFileHistory fileHistory1 = new PartialFileHistory(11111111111111111L);

    databaseVersion1.addFileHistory(fileHistory1);
    databaseVersion1.addFileVersionToHistory(fileHistory1.getFileId(), fileVersion1);

    database.addDatabaseVersion(databaseVersion1);

    assertEquals(fileHistory1, database.getFileHistory("file1.jpg"));

    // Round 2: Add new version
    DatabaseVersion databaseVersion2 = TestDatabaseUtil.createDatabaseVersion(databaseVersion1);

    // - delete file1.jpg
    FileVersion fileVersion2 = TestDatabaseUtil.createFileVersion("file1.jpg", fileVersion1);
    fileVersion2.setStatus(FileStatus.DELETED);

    PartialFileHistory fileHistory2 = new PartialFileHistory(11111111111111111L); // same ID	

    databaseVersion2.addFileHistory(fileHistory2);
    databaseVersion2.addFileVersionToHistory(fileHistory2.getFileId(), fileVersion2);

    // - add file1.jpg (as FOLDER!)
    FileVersion fileVersion3 = TestDatabaseUtil.createFileVersion("file1.jpg"); // new file!
    fileVersion3.setType(FileType.FOLDER);

    PartialFileHistory fileHistory3 = new PartialFileHistory(222222222L); // new ID	!

    databaseVersion2.addFileHistory(fileHistory3);
    databaseVersion2.addFileVersionToHistory(fileHistory3.getFileId(), fileVersion3);

    // - add datbase version
    database.addDatabaseVersion(databaseVersion2);

    assertNotNull(database.getFileHistory("file1.jpg"));
    assertEquals(1, database.getFileHistory("file1.jpg").getFileVersions().size());
    assertEquals(fileHistory3, database.getFileHistory("file1.jpg"));
  }
  @Test
  public void testChangedModifiedDate() throws Exception {
    // Setup
    Connection testConnection = TestConfigUtil.createTestLocalConnection();

    TestClient clientA = new TestClient("A", testConnection);
    TestClient clientB = new TestClient("B", testConnection);

    // Run

    // A, create two files with identical content and change mod. date of one of them
    clientA.createNewFile("A-file1.jpg", 50 * 1024);
    clientA.copyFile("A-file1.jpg", "A-file1-with-different-modified-date.jpg");
    clientA.getLocalFile("A-file1.jpg").setLastModified(0);
    clientA.up();

    // B, down, then move BOTH files
    clientB.down();
    assertFileListEquals(clientA.getLocalFiles(), clientB.getLocalFiles());
    assertDatabaseFileEquals(
        clientA.getLocalDatabaseFile(),
        clientB.getLocalDatabaseFile(),
        clientA.getConfig().getTransformer());

    clientB.moveFile("A-file1.jpg", "A-file1-moved.jpg");
    clientB.moveFile(
        "A-file1-with-different-modified-date.jpg",
        "A-file1-with-different-modified-date-moved.jpg");
    clientB.up();

    Database clientDatabaseB = clientB.loadLocalDatabase();

    PartialFileHistory file1Orig = clientDatabaseB.getFileHistory("A-file1-moved.jpg");
    PartialFileHistory file1WithDiffLastModDate =
        clientDatabaseB.getFileHistory("A-file1-with-different-modified-date-moved.jpg");

    assertNotNull(file1Orig);
    assertNotNull(file1WithDiffLastModDate);

    FileVersion fileVersion1OrigV1 = file1Orig.getFileVersion(1);
    FileVersion fileVersion1OrigV2 = file1Orig.getFileVersion(2);

    FileVersion fileVersion1WithDiffLastModDateV1 = file1WithDiffLastModDate.getFileVersion(1);
    FileVersion fileVersion1WithDiffLastModDateV2 = file1WithDiffLastModDate.getFileVersion(2);

    assertNotNull(fileVersion1OrigV1);
    assertNotNull(fileVersion1OrigV2);
    assertNotNull(fileVersion1WithDiffLastModDateV1);
    assertNotNull(fileVersion1WithDiffLastModDateV2);

    assertEquals("A-file1.jpg", fileVersion1OrigV1.getName());
    assertEquals("A-file1-moved.jpg", fileVersion1OrigV2.getName());
    assertEquals(
        "A-file1-with-different-modified-date.jpg", fileVersion1WithDiffLastModDateV1.getName());
    assertEquals(
        "A-file1-with-different-modified-date-moved.jpg",
        fileVersion1WithDiffLastModDateV2.getName());

    // Tear down
    clientA.cleanup();
    clientB.cleanup();
  }