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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/messagebus/reply.h>
namespace documentapi {
class ReplyMerger
{
public:
class Result {
friend class ReplyMerger;
std::unique_ptr<mbus::Reply> _generatedReply;
uint32_t _successIdx;
Result(uint32_t successIdx, std::unique_ptr<mbus::Reply> generatedReply);
public:
Result(Result&& o) noexcept
: _generatedReply(std::move(o._generatedReply)),
_successIdx(o._successIdx)
{ }
bool hasGeneratedReply() const;
bool isSuccessful() const;
std::unique_ptr<mbus::Reply> releaseGeneratedReply();
uint32_t getSuccessfulReplyIndex() const;
};
private:
std::unique_ptr<mbus::Reply> _error;
std::unique_ptr<mbus::Reply> _ignored;
const mbus::Reply* _successReply;
uint32_t _successIndex;
void mergeAllReplyErrors(const mbus::Reply&);
bool handleReplyWithOnlyIgnoredErrors(const mbus::Reply& r);
bool shouldReturnErrorReply() const;
std::unique_ptr<mbus::Reply> releaseGeneratedErrorReply();
bool replyIsBetterThanCurrent(const mbus::Reply& r) const;
void setCurrentBestReply(uint32_t idx, const mbus::Reply& r);
void updateStateWithSuccessfulReply(uint32_t idx, const mbus::Reply& r);
bool successfullyMergedAtLeastOneReply() const;
static Result createEmptyReplyResult();
static bool resourceWasFound(const mbus::Reply& r);
public:
ReplyMerger();
~ReplyMerger();
void merge(uint32_t idx, const mbus::Reply&);
Result mergedReply();
};
} // documentapi
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