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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "shrink_lid_space_flush_target.h"
#include <vespa/searchlib/common/i_compactable_lid_space.h>
namespace proton {
using searchcorespi::IFlushTarget;
using searchcorespi::LeafFlushTarget;
using searchcorespi::FlushStats;
using searchcorespi::FlushTask;
class ShrinkLidSpaceFlushTarget::Flusher : public FlushTask
{
ShrinkLidSpaceFlushTarget &_target;
SerialNum _flushSerialNum;
public:
Flusher(ShrinkLidSpaceFlushTarget &target, SerialNum flushSerialNum);
void run() override;
search::SerialNum getFlushSerial() const override;
};
ShrinkLidSpaceFlushTarget::Flusher::Flusher(ShrinkLidSpaceFlushTarget &target, SerialNum flushSerialNum)
: FlushTask(),
_target(target),
_flushSerialNum(flushSerialNum)
{
_target._target->shrinkLidSpace();
}
void
ShrinkLidSpaceFlushTarget::Flusher::run()
{
_target._flushedSerialNum = _flushSerialNum;
_target._lastFlushTime = vespalib::system_clock::now();
}
search::SerialNum
ShrinkLidSpaceFlushTarget::Flusher::getFlushSerial() const
{
return _flushSerialNum;
}
ShrinkLidSpaceFlushTarget::ShrinkLidSpaceFlushTarget(const vespalib::string &name,
Type type,
Component component,
SerialNum flushedSerialNum,
Time lastFlushTime,
std::shared_ptr<ICompactableLidSpace> target)
: LeafFlushTarget(name, type, component),
_target(std::move(target)),
_flushedSerialNum(flushedSerialNum),
_lastFlushTime(lastFlushTime),
_lastStats()
{
}
IFlushTarget::MemoryGain
ShrinkLidSpaceFlushTarget::getApproxMemoryGain() const
{
int64_t canFree = _target->getEstimatedShrinkLidSpaceGain();
return MemoryGain(canFree, 0);
}
IFlushTarget::DiskGain
ShrinkLidSpaceFlushTarget::getApproxDiskGain() const
{
return DiskGain(0, 0);
}
IFlushTarget::SerialNum
ShrinkLidSpaceFlushTarget::getFlushedSerialNum() const
{
return _flushedSerialNum;
}
IFlushTarget::Time
ShrinkLidSpaceFlushTarget::getLastFlushTime() const
{
return _lastFlushTime;
}
IFlushTarget::Task::UP
ShrinkLidSpaceFlushTarget::initFlush(SerialNum currentSerial, std::shared_ptr<search::IFlushToken>)
{
if (currentSerial < _flushedSerialNum) {
_lastFlushTime = vespalib::system_clock::now();
return IFlushTarget::Task::UP();
} else if (!_target->canShrinkLidSpace()) {
_flushedSerialNum = currentSerial;
_lastFlushTime = vespalib::system_clock::now();
return IFlushTarget::Task::UP();
} else {
return std::make_unique<Flusher>(*this, currentSerial);
}
}
FlushStats
ShrinkLidSpaceFlushTarget::getLastFlushStats() const
{
return _lastStats;
}
uint64_t
ShrinkLidSpaceFlushTarget::getApproxBytesToWriteToDisk() const
{
return 0;
}
} // namespace proton
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