public static PostgreSQLSourceDTO getFromJson(@NotNull String extParams) {
        try {
            return JsonUtils.parseObject(extParams, PostgreSQLSourceDTO.class);
        } catch (Exception e) {
            throw new BusinessException(ErrorCodeEnum.SOURCE_INFO_INCORRECT,
                    String.format("parse extParams of PostgreSQLSource failure: %s", e.getMessage()));
        }
    }
Get the dto instance from the request
inlong-manager/manager-pojo/src/main/java/org/apache/inlong/manager/pojo/source/postgresql/PostgreSQLSourceDTO.java