| // 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 KUDU_UTIL_OID_GENERATOR_H |
| #define KUDU_UTIL_OID_GENERATOR_H |
| |
| #include <string> |
| |
| #include <boost/uuid/random_generator.hpp> |
| #include <boost/uuid/string_generator.hpp> |
| |
| #include "kudu/gutil/macros.h" |
| #include "kudu/util/locks.h" |
| #include "kudu/util/status.h" |
| |
| namespace kudu { |
| |
| // Generates a unique 32byte id, based on uuid v4. |
| // This class is thread safe |
| class ObjectIdGenerator { |
| public: |
| ObjectIdGenerator() {} |
| ~ObjectIdGenerator() {} |
| |
| // Generates and returns a new UUID. |
| std::string Next(); |
| |
| // Validates an existing UUID and converts it into the format used by Kudu |
| // (that is, 16 hexadecimal bytes without any dashes). |
| Status Canonicalize(const std::string& input, std::string* output) const; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(ObjectIdGenerator); |
| |
| typedef simple_spinlock LockType; |
| |
| // Protects 'oid_generator_'. |
| LockType oid_lock_; |
| |
| // Generates new UUIDs. |
| boost::uuids::random_generator oid_generator_; |
| |
| // Validates provided UUIDs. |
| boost::uuids::string_generator oid_validator_; |
| }; |
| |
| } // namespace kudu |
| |
| #endif |