DataRequest.h

/*
 * Copyright (C) 2019-2020 HERE Europe B.V.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 * License-Filename: LICENSE
 */
 
#pragma once
 
#include <sstream>
#include <string>
#include <utility>
 
#include <olp/core/porting/optional.h>
#include <olp/core/thread/TaskScheduler.h>
#include <olp/dataservice/read/DataServiceReadApi.h>
#include <olp/dataservice/read/FetchOptions.h>
 
namespace olp {
namespace dataservice {
namespace read {
 
class DATASERVICE_READ_API DataRequest final {
 public:
  const porting::optional<std::string>& GetPartitionId() const {
    return partition_id_;
  }
 
  template <class T = porting::optional<std::string>>
  DataRequest& WithPartitionId(T&& partition_id) {
    partition_id_ = std::forward<T>(partition_id);
    return *this;
  }
 
  const porting::optional<std::string>& GetDataHandle() const {
    return data_handle_;
  }
 
  template <class T = porting::optional<std::string>>
  DataRequest& WithDataHandle(T&& data_handle) {
    data_handle_ = std::forward<T>(data_handle);
    return *this;
  }
 
  const porting::optional<std::string>& GetBillingTag() const {
    return billing_tag_;
  }
 
  template <class T = porting::optional<std::string>>
  DataRequest& WithBillingTag(T&& tag) {
    billing_tag_ = std::forward<T>(tag);
    return *this;
  }
 
  FetchOptions GetFetchOption() const { return fetch_option_; }
 
  DataRequest& WithFetchOption(FetchOptions fetch_option) {
    fetch_option_ = fetch_option;
    return *this;
  }
 
  uint32_t GetPriority() const { return priority_; }
 
  DataRequest& WithPriority(uint32_t priority) {
    priority_ = priority;
    return *this;
  }
 
  std::string CreateKey(const std::string& layer_id,
                        porting::optional<int64_t> version) const {
    std::stringstream out;
    out << layer_id << "[";
    if (GetPartitionId()) {
      out << *GetPartitionId();
    } else if (GetDataHandle()) {
      out << *GetDataHandle();
    }
    out << "]";
    if (version) {
      out << "@" << *version;
    }
    if (GetBillingTag()) {
      out << "$" << *GetBillingTag();
    }
    out << "^" << GetFetchOption();
    return out.str();
  }
 
 private:
  porting::optional<std::string> partition_id_;
  porting::optional<int64_t> catalog_version_;
  porting::optional<std::string> data_handle_;
  porting::optional<std::string> billing_tag_;
  FetchOptions fetch_option_{OnlineIfNotFound};
  uint32_t priority_{thread::NORMAL};
};
 
}  // namespace read
}  // namespace dataservice
}  // namespace olp