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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 "indexmaintainer.h"
#include <vespa/searchcorespi/flush/iflushtarget.h>
namespace searchcorespi::index {
/**
* Flush target for doing fusion on disk indexes in an IndexMaintainer.
**/
class IndexFusionTarget : public LeafFlushTarget {
private:
IndexMaintainer &_indexMaintainer;
IndexMaintainer::FusionStats _fusionStats;
FlushStats _lastStats;
public:
IndexFusionTarget(IndexMaintainer &indexMaintainer);
~IndexFusionTarget() override;
// Implements IFlushTarget
MemoryGain getApproxMemoryGain() const override;
DiskGain getApproxDiskGain() const override;
SerialNum getFlushedSerialNum() const override;
Time getLastFlushTime() const override;
bool needUrgentFlush() const override;
Task::UP initFlush(SerialNum currentSerial, std::shared_ptr<search::IFlushToken> flush_token) override;
FlushStats getLastFlushStats() const override { return _lastStats; }
uint64_t getApproxBytesToWriteToDisk() const override;
};
}
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