| /* |
| 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. |
| */ |
| |
| /** |
| * @file fetch_policy_simple.h |
| * @brief Simple fetch policy (header file). |
| */ |
| |
| #pragma once |
| |
| #include "fetch_policy.h" |
| |
| /** |
| * @brief Simple de-duplication fetch policy, used to make sure only one background fetch is running at a time. |
| */ |
| |
| class FetchPolicySimple : public FetchPolicy |
| { |
| public: |
| FetchPolicySimple() {} |
| ~FetchPolicySimple() override{}; |
| bool init(const char *parameters) override; |
| bool acquire(const std::string &url) override; |
| bool release(const std::string &url) override; |
| const char *name() override; |
| size_t getSize() override; |
| size_t getMaxSize() override; |
| |
| private: |
| std::unordered_map<std::string, bool> _urls; |
| }; |