示例#1
0
  private void handleGetFileRequest(GetFileRequest fileRequest) {
    try {
      FileHistoryId fileHistoryId = FileHistoryId.parseFileId(fileRequest.getFileHistoryId());
      long version = fileRequest.getVersion();

      FileVersion fileVersion = localDatabase.getFileVersion(fileHistoryId, version);
      FileContent fileContent = localDatabase.getFileContent(fileVersion.getChecksum(), true);
      Map<ChunkChecksum, MultiChunkId> multiChunks =
          localDatabase.getMultiChunkIdsByChecksums(fileContent.getChunks());

      TransferManager transferManager =
          config.getTransferPlugin().createTransferManager(config.getConnection());
      Downloader downloader = new Downloader(config, transferManager);
      Assembler assembler = new Assembler(config, localDatabase);

      downloader.downloadAndDecryptMultiChunks(new HashSet<MultiChunkId>(multiChunks.values()));

      File tempFile = assembler.assembleToCache(fileVersion);
      String tempFileToken = StringUtil.toHex(ObjectId.secureRandomBytes(40));

      GetFileResponse fileResponse =
          new GetFileResponse(fileRequest.getId(), fileRequest.getRoot(), tempFileToken);
      GetFileResponseInternal fileResponseInternal =
          new GetFileResponseInternal(fileResponse, tempFile);

      eventBus.post(fileResponseInternal);
    } catch (Exception e) {
      logger.log(Level.WARNING, "Cannot reassemble file.", e);
      eventBus.post(new BadRequestResponse(fileRequest.getId(), "Cannot reassemble file."));
    }
  }
  @Override
  public OperationResult execute() throws Exception {
    logger.log(Level.INFO, "Determine file system actions ...");

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

    if (cleanupOccurred) {
      actions =
          actionReconciliator.determineFileSystemActions(
              winnersDatabase, true, preDeleteFileHistoriesWithLastVersion);
    } else {
      actions = actionReconciliator.determineFileSystemActions(winnersDatabase);
    }

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

    downloader.downloadAndDecryptMultiChunks(unknownMultiChunks);
    result.getDownloadedMultiChunks().addAll(unknownMultiChunks);

    applyFileSystemActions(actions);

    return null;
  }