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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 vespalib { class Executor; }
namespace proton {
/**
* Implements a flush target that proxies everything to the given
* target.
*/
class FlushTargetProxy : public searchcorespi::IFlushTarget
{
protected:
IFlushTarget::SP _target;
public:
/**
* Constructs a new instance of this class.
*
* @param target The target to decorate.
*/
FlushTargetProxy(const IFlushTarget::SP &target);
/**
* Constructs a new instance of this class.
*
* @param target The target to decorate.
* @param prefix The prefix to prepend to the target
*/
FlushTargetProxy(const IFlushTarget::SP &target, const vespalib::string & prefix);
/**
* Returns the decorated flush target. This should not be used for anything
* but testing, as invoking a method on the returned target beats the
* purpose of decorating it.
*
* @return The decorated flush target.
*/
const IFlushTarget::SP & getFlushTarget() const { return _target; }
// Implements IFlushTarget.
MemoryGain getApproxMemoryGain() const override { return _target->getApproxMemoryGain(); }
DiskGain getApproxDiskGain() const override { return _target->getApproxDiskGain(); }
SerialNum getFlushedSerialNum() const override { return _target->getFlushedSerialNum(); }
Time getLastFlushTime() const override { return _target->getLastFlushTime(); }
bool needUrgentFlush() const override { return _target->needUrgentFlush(); }
Priority getPriority() const override { return _target->getPriority(); }
uint64_t getApproxBytesToWriteToDisk() const override { return _target->getApproxBytesToWriteToDisk(); }
searchcorespi::FlushStats getLastFlushStats() const override { return _target->getLastFlushStats(); }
double get_replay_operation_cost() const override { return _target->get_replay_operation_cost(); }
Task::UP initFlush(SerialNum currentSerial, std::shared_ptr<search::IFlushToken> flush_token) override;
};
} // namespace proton
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