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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "i_match_loop_communicator.h"
#include <vespa/searchlib/queryeval/idiversifier.h>
#include <vespa/vespalib/util/rendezvous.h>
namespace proton::matching {
class MatchLoopCommunicator : public IMatchLoopCommunicator
{
private:
using IDiversifier = search::queryeval::IDiversifier;
struct EstimateMatchFrequency : vespalib::Rendezvous<Matches, double> {
EstimateMatchFrequency(size_t n) : vespalib::Rendezvous<Matches, double>(n) {}
void mingle() override;
};
struct SelectBest : vespalib::Rendezvous<Hits, Hits> {
size_t topN;
std::vector<uint32_t> _indexes;
std::unique_ptr<IDiversifier> _diversifier;
SelectBest(size_t n, size_t topN_in, std::unique_ptr<IDiversifier>);
~SelectBest() override;
void mingle() override;
template<typename Q, typename F>
void mingle(Q & queue, F && accept);
bool cmp(uint32_t a, uint32_t b) {
return (in(a)[_indexes[a]].second > in(b)[_indexes[b]].second);
}
};
struct SelectCmp {
SelectBest &sb;
SelectCmp(SelectBest &sb_in) : sb(sb_in) {}
bool operator()(uint32_t a, uint32_t b) const {
return (sb.cmp(a, b));
}
};
struct RangeCover : vespalib::Rendezvous<RangePair, RangePair> {
RangeCover(size_t n) : vespalib::Rendezvous<RangePair, RangePair>(n) {}
void mingle() override;
};
EstimateMatchFrequency _estimate_match_frequency;
SelectBest _selectBest;
RangeCover _rangeCover;
public:
MatchLoopCommunicator(size_t threads, size_t topN);
MatchLoopCommunicator(size_t threads, size_t topN, std::unique_ptr<IDiversifier>);
~MatchLoopCommunicator();
double estimate_match_frequency(const Matches &matches) override {
return _estimate_match_frequency.rendezvous(matches);
}
Hits selectBest(Hits sortedHits) override {
return _selectBest.rendezvous(sortedHits);
}
RangePair rangeCover(const RangePair &ranges) override {
return _rangeCover.rendezvous(ranges);
}
};
}
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