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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "scheduledexecutor.h"
#include <vespa/fnet/scheduler.h>
#include <vespa/fnet/task.h>
#include <vespa/fnet/transport.h>
#include <vespa/vespalib/stllike/hash_map.hpp>
using vespalib::duration;
namespace proton {
using Task = vespalib::Executor::Task;
class TimerTask : public FNET_Task
{
private:
Task::UP _task;
duration _interval;
public:
TimerTask(const TimerTask &) = delete;
TimerTask&operator=(const TimerTask &) = delete;
TimerTask(FNET_Scheduler *scheduler, Task::UP task, duration interval)
: FNET_Task(scheduler),
_task(std::move(task)),
_interval(interval)
{ }
~TimerTask() override {
Kill();
}
void PerformTask() override {
_task->run();
Schedule(vespalib::to_s(_interval));
}
};
class ScheduledExecutor::Registration : public vespalib::IDestructorCallback {
private:
ScheduledExecutor & _executor;
uint64_t _key;
public:
Registration(ScheduledExecutor & executor, uint64_t key) : _executor(executor), _key(key) {}
~Registration() {
_executor.cancel(_key);
}
};
ScheduledExecutor::ScheduledExecutor(FNET_Transport & transport)
: _transport(transport),
_lock(),
_nextKey(0),
_taskList()
{ }
ScheduledExecutor::~ScheduledExecutor()
{
std::lock_guard guard(_lock);
assert(_taskList.empty());
}
IScheduledExecutor::Handle
ScheduledExecutor::scheduleAtFixedRate(Executor::Task::UP task, duration delay, duration interval)
{
std::lock_guard guard(_lock);
uint64_t key = _nextKey++;
auto tTask = std::make_unique<TimerTask>(_transport.GetScheduler(), std::move(task), interval);
auto & taskRef = *tTask;
_taskList[key] = std::move(tTask);
taskRef.Schedule(vespalib::to_s(delay));
return std::make_unique<Registration>(*this, key);
}
bool
ScheduledExecutor::cancel(uint64_t key)
{
std::lock_guard guard(_lock);
auto found = _taskList.find(key);
if (found == _taskList.end()) return false;
found->second->Unschedule();
_taskList.erase(found);
return true;
}
}
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