public Response apply()

in src/main/java/com/googlesource/gerrit/plugins/serviceuser/CreateServiceUser.java [119:196]
67 lines of code
15 McCabe index (conditional complexity)

  public Response<ServiceUserInfo> apply(
      ConfigResource parentResource, IdString id, CreateServiceUser.Input input)
      throws RestApiException, IOException, ConfigInvalidException, PermissionBackendException {
    CurrentUser user = userProvider.get();
    if (user == null || !user.isIdentifiedUser()) {
      throw new AuthException("authentication required");
    }

    if (input == null) {
      input = new Input();
    }
    String username = id.get();
    if (input.username != null && !username.equals(input.username)) {
      throw new BadRequestException("username must match URL");
    }

    if (Strings.isNullOrEmpty(input.sshKey)) {
      throw new BadRequestException("sshKey not set");
    }

    if (!SshKeyValidator.validateFormat(input.sshKey)) {
      throw new BadRequestException("sshKey invalid.");
    }

    if (blockedNameFilter.isBlocked(username)) {
      throw new BadRequestException(
          "The username '" + username + "' is not allowed as name for service users.");
    }

    input.email = Strings.emptyToNull(input.email);
    if (input.email != null) {
      Boolean emailAllowed;
      try {
        emailAllowed = getConfig.get().apply(new ConfigResource()).value().allowEmail;
      } catch (Exception e) {
        throw asRestApiException("Cannot get configuration", e);
      }
      if (emailAllowed == null || !emailAllowed) {
        throw new ResourceConflictException("email not allowed");
      }
    }

    AccountInput in = new ServiceUserInput(username, input.email, input.sshKey);
    in.groups = Arrays.asList(cfg.getStringList("group"));

    AccountInfo response;
    try {
      response = createAccount.apply(IdString.fromDecoded(username), in).value();
    } catch (Exception e) {
      throw asRestApiException("Cannot create account", e);
    }

    String creator = user.getUserName().get();
    Account.Id creatorId = ((IdentifiedUser) user).getAccountId();
    String creationDate = rfc2822DateFormatter.format(new Date());

    try (MetaDataUpdate md = metaDataUpdateFactory.create(allProjects)) {
      ProjectLevelConfig.Bare update = configProvider.get();
      update.load(md);

      Config db = update.getConfig();
      db.setInt(USER, response.username, KEY_CREATOR_ID, creatorId.get());
      if (creator != null) {
        db.setString(USER, response.username, KEY_CREATED_BY, creator);
      }
      db.setString(USER, response.username, KEY_CREATED_AT, creationDate);

      md.setMessage("Create service user '" + username + "'\n");
      update.commit(md);
      storageCache.invalidate();
    }
    ServiceUserInfo info = new ServiceUserInfo(response);
    AccountLoader al = accountLoader.create(true);
    info.createdBy = al.get(creatorId);
    al.fill();
    info.createdAt = creationDate;
    return Response.created(info);
  }