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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "isequencedtaskexecutor.h"
#include <atomic>
namespace vespalib {
/**
* Observer class to observe class to run multiple tasks in parallel,
* but tasks with same id has to be run in sequence.
*/
class SequencedTaskExecutorObserver : public ISequencedTaskExecutor
{
ISequencedTaskExecutor &_executor;
std::atomic<uint32_t> _executeCnt;
std::atomic<uint32_t> _syncCnt;
std::vector<uint32_t> _executeHistory;
std::mutex _mutex;
public:
using ISequencedTaskExecutor::getExecutorId;
SequencedTaskExecutorObserver(ISequencedTaskExecutor &executor);
~SequencedTaskExecutorObserver() override;
ExecutorId getExecutorId(uint64_t componentId) const override;
void executeTask(ExecutorId id, Executor::Task::UP task) override;
void executeTasks(TaskList tasks) override;
void sync_all() override;
void setTaskLimit(uint32_t taskLimit) override;
ExecutorStats getStats() override;
uint32_t getExecuteCnt() const { return _executeCnt; }
uint32_t getSyncCnt() const { return _syncCnt; }
std::vector<uint32_t> getExecuteHistory();
};
} // namespace search
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