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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchcorespi/flush/iflushtarget.h>
namespace search::common { struct ICompactableLidSpace; }
namespace proton {
/**
* Implements a flush target that shrinks lid space in target.
*/
class ShrinkLidSpaceFlushTarget : public searchcorespi::LeafFlushTarget
{
/**
* Task representing that shrinking has been performed.
**/
class Flusher;
using ICompactableLidSpace = search::common::ICompactableLidSpace;
using FlushStats = searchcorespi::FlushStats;
std::shared_ptr<ICompactableLidSpace> _target;
SerialNum _flushedSerialNum;
Time _lastFlushTime;
FlushStats _lastStats;
public:
/**
* Constructs a new instance of this class.
*
* @param name The handler-wide unique name of this target.
* @param type The flush type of this target.
* @param component The component type of this target.
* @param flushedSerialNum When target shrank lid space last time
* @param target The target supporting lid space compaction
*/
ShrinkLidSpaceFlushTarget(const vespalib::string &name,
Type type,
Component component,
SerialNum flushedSerialNum,
Time lastFlushTime,
std::shared_ptr<ICompactableLidSpace> target);
// Implements IFlushTarget.
MemoryGain getApproxMemoryGain() const override;
DiskGain getApproxDiskGain() const override;
SerialNum getFlushedSerialNum() const override;
Time getLastFlushTime() const override;
Task::UP initFlush(SerialNum currentSerial, std::shared_ptr<search::IFlushToken> flush_token) override;
searchcorespi::FlushStats getLastFlushStats() const override;
uint64_t getApproxBytesToWriteToDisk() const override;
};
} // namespace proton
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