protected long changes(List<Change> changes) throws IOException {
    com.google.api.services.drive.Drive.Changes.List request = drive.changes().list();
    request.setMaxResults(100);
    long lastChange = -1;
    Object lastChangeData = stub.storage().get(StorageService.REMOTE_CHANGE);
    if (lastChangeData != null) {
      if (lastChangeData instanceof Double) {
        lastChange = ((Double) lastChangeData).longValue();
        request.setStartChangeId(lastChange + 1);
      } else if (lastChangeData instanceof Long) {
        lastChange = (Long) lastChangeData;
        request.setStartChangeId(lastChange + 1);
      } else {
        throw new IllegalArgumentException(lastChangeData.getClass().getName());
      }
    }

    while (true) {
      ChangeList response = execute(request);
      if (changes != null) {
        changes.addAll(response.getItems());
      }
      if (StringUtils.isEmpty(response.getNextPageToken())) {
        List<Change> items = response.getItems();
        if (!items.isEmpty()) lastChange = items.get(items.size() - 1).getId();
        break;
      } else {
        request.setPageToken(response.getNextPageToken());
      }
    }
    return lastChange;
  }
Beispiel #2
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  /**
   * Retrieve a collection of files that have changed since the provided {@code changeId}.
   *
   * @param changeId Change ID to retrieve changed files from.
   * @return Map of changed files key'ed by their file ID.
   */
  private Map<String, File> getChangedFiles(long changeId) {
    Map<String, File> result = new HashMap<String, File>();

    try {
      Changes.List request = mService.changes().list().setStartChangeId(changeId);
      do {
        ChangeList changes = request.execute();
        long largestChangeId = changes.getLargestChangeId().longValue();

        for (Change change : changes.getItems()) {
          if (change.getDeleted()) {
            result.put(change.getFileId(), null);
          } else if (TEXT_PLAIN.equals(change.getFile().getMimeType())) {
            result.put(change.getFileId(), change.getFile());
          }
        }

        if (largestChangeId > mLargestChangeId) {
          mLargestChangeId = largestChangeId;
        }
        request.setPageToken(changes.getNextPageToken());
      } while (request.getPageToken() != null && request.getPageToken().length() > 0);
    } catch (IOException e) {
      e.printStackTrace();
    }

    Log.d(TAG, "Got changed Drive files: " + result.size() + " - " + mLargestChangeId);
    return result;
  }
  /**
   * connect.
   *
   * @param messageContext ESB messageContext.
   * @throws ConnectException if connection fails.
   */
  public void connect(MessageContext messageContext) throws ConnectException {

    ChangeList changeList;
    OMElement changeListResult;

    HashMap<String, String> parameters = new HashMap<String, String>();
    parameters.put(
        GoogleDriveUtils.StringConstants.INCLUDE_DELETED,
        (String) getParameter(messageContext, GoogleDriveUtils.StringConstants.INCLUDE_DELETED));
    parameters.put(
        GoogleDriveUtils.StringConstants.INCLUDE_SUBSCRIBED,
        (String) getParameter(messageContext, GoogleDriveUtils.StringConstants.INCLUDE_SUBSCRIBED));
    parameters.put(
        GoogleDriveUtils.StringConstants.MAX_RESULTS,
        (String) getParameter(messageContext, GoogleDriveUtils.StringConstants.MAX_RESULTS));
    parameters.put(
        GoogleDriveUtils.StringConstants.PAGE_TOKEN,
        (String) getParameter(messageContext, GoogleDriveUtils.StringConstants.PAGE_TOKEN));
    parameters.put(
        GoogleDriveUtils.StringConstants.START_CHANGE_ID,
        (String) getParameter(messageContext, GoogleDriveUtils.StringConstants.START_CHANGE_ID));
    HashMap<String, String> hashMapForResultEnvelope = new HashMap<String, String>();

    try {

      HttpTransport httpTransport = new NetHttpTransport();
      JsonFactory jsonFactory = new JacksonFactory();

      Drive service = GoogleDriveUtils.getDriveService(messageContext, httpTransport, jsonFactory);

      changeList = getChangeList(service, parameters);

      if (changeList != null) {

        hashMapForResultEnvelope.put(
            GoogleDriveUtils.StringConstants.CHANGE_LIST, changeList.toPrettyString());

        changeListResult =
            GoogleDriveUtils.buildResultEnvelope(
                GoogleDriveUtils.StringConstants.URN_GOOGLEDRIVE_LISTCHANGESFORUSER,
                GoogleDriveUtils.StringConstants.LIST_CHANGES_FOR_USER_RESULT,
                true,
                hashMapForResultEnvelope);
        messageContext.getEnvelope().getBody().addChild(changeListResult);
      }

    } catch (Exception e) {
      hashMapForResultEnvelope.put(GoogleDriveUtils.StringConstants.ERROR, e.getMessage());
      changeListResult =
          GoogleDriveUtils.buildResultEnvelope(
              GoogleDriveUtils.StringConstants.URN_GOOGLEDRIVE_LISTCHANGESFORUSER,
              GoogleDriveUtils.StringConstants.LIST_CHANGES_FOR_USER_RESULT,
              false,
              hashMapForResultEnvelope);
      messageContext.getEnvelope().getBody().addChild(changeListResult);
      log.error("Error: " + GoogleDriveUtils.getStackTraceAsString(e));
    }
  }