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ForeignTableRefreshScheduler.h
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1 /*
2  * Copyright 2020 OmniSci, Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include <condition_variable>
20 #include <mutex>
21 #include <string>
22 #include <thread>
23 
24 namespace foreign_storage {
26  public:
27  static void start(std::atomic<bool>& is_program_running);
28  static void stop();
29 
30  // The following methods are for testing purposes only
31  static void setWaitDuration(int64_t duration_in_seconds);
32  static bool isRunning();
33  static bool hasRefreshedTable();
34  static void resetHasRefreshedTable();
35 
36  private:
37  static void invalidateQueryEngineCaches();
38  static std::atomic<bool> is_scheduler_running_;
39  static std::chrono::seconds thread_wait_duration_;
40  static std::thread scheduler_thread_;
41  static std::atomic<bool> has_refreshed_table_;
42  static std::mutex wait_mutex_;
43  static std::condition_variable wait_condition_;
44 };
45 } // namespace foreign_storage
static void setWaitDuration(int64_t duration_in_seconds)
static void start(std::atomic< bool > &is_program_running)