| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| #ifndef LIBMINIFI_INCLUDE_UTILS_ID_H_ |
| #define LIBMINIFI_INCLUDE_UTILS_ID_H_ |
| |
| #include <utility> |
| #include <cstddef> |
| #include <atomic> |
| #include <memory> |
| #include <string> |
| #include <thread> |
| |
| #ifndef WIN32 |
| class uuid; |
| #endif |
| |
| #include "core/logging/Logger.h" |
| #include "properties/Properties.h" |
| #include "OptionalUtils.h" |
| |
| #define UUID_TIME_IMPL 0 |
| #define UUID_RANDOM_IMPL 1 |
| #define UUID_DEFAULT_IMPL 2 |
| #define MINIFI_UID_IMPL 3 |
| |
| #define UUID_RANDOM_STR "random" |
| #define UUID_WINDOWS_RANDOM_STR "windows_random" |
| #define UUID_DEFAULT_STR "uuid_default" |
| #define MINIFI_UID_STR "minifi_uid" |
| #define UUID_TIME_STR "time" |
| #define UUID_WINDOWS_STR "windows" |
| |
| namespace org { |
| namespace apache { |
| namespace nifi { |
| namespace minifi { |
| namespace utils { |
| |
| class Identifier { |
| friend struct IdentifierTestAccessor; |
| static constexpr const char* UUID_FORMAT_STRING = "%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"; |
| |
| public: |
| using Data = std::array<uint8_t, 16>; |
| |
| Identifier() = default; |
| explicit Identifier(const Data& data); |
| Identifier &operator=(const Data& data); |
| |
| Identifier &operator=(const std::string& idStr); |
| |
| bool operator!=(const Identifier& other) const; |
| bool operator==(const Identifier& other) const; |
| |
| bool isNil() const; |
| |
| std::string to_string() const; |
| |
| static utils::optional<Identifier> parse(const std::string& str); |
| |
| private: |
| static bool parseByte(Data& data, const uint8_t* input, int& charIdx, int& byteIdx); |
| |
| Data data_{}; |
| }; |
| |
| class IdGenerator { |
| public: |
| Identifier generate(); |
| void initialize(const std::shared_ptr<Properties>& properties); |
| |
| ~IdGenerator(); |
| |
| static std::shared_ptr<IdGenerator> getIdGenerator() { |
| static std::shared_ptr<IdGenerator> generator = std::shared_ptr<IdGenerator>(new IdGenerator()); |
| return generator; |
| } |
| |
| protected: |
| uint64_t getDeviceSegmentFromString(const std::string& str, int numBits) const; |
| uint64_t getRandomDeviceSegment(int numBits) const; |
| |
| private: |
| IdGenerator(); |
| int implementation_; |
| std::shared_ptr<minifi::core::logging::Logger> logger_; |
| |
| unsigned char deterministic_prefix_[8]; |
| std::atomic<uint64_t> incrementor_; |
| |
| std::mutex uuid_mutex_; |
| #ifndef WIN32 |
| std::unique_ptr<uuid> uuid_impl_; |
| bool generateWithUuidImpl(unsigned int mode, Identifier::Data& output); |
| #endif |
| }; |
| |
| class NonRepeatingStringGenerator { |
| public: |
| std::string generate() { |
| return prefix_ + std::to_string(incrementor_++); |
| } |
| uint64_t generateId() { |
| return incrementor_++; |
| } |
| private: |
| std::atomic<uint64_t> incrementor_{0}; |
| std::string prefix_{std::to_string(std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count()) + "-"}; |
| }; |
| |
| } // namespace utils |
| } // namespace minifi |
| } // namespace nifi |
| } // namespace apache |
| } // namespace org |
| |
| #endif // LIBMINIFI_INCLUDE_UTILS_ID_H_ |