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73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
#pragma once
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#include <DB/Core/Types.h>
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#include <DB/IO/ReadBuffer.h>
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#include <DB/IO/ReadBufferFromString.h>
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#include <DB/IO/WriteBuffer.h>
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#include <DB/IO/WriteBufferFromString.h>
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#include <DB/IO/Operators.h>
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#include <zkutil/ZooKeeper.h>
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namespace DB
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{
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/** Для реализации функциональности "кворумная запись".
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* Информация о том, на каких репликах появился вставленный кусок данных,
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* и на скольких репликах он должен быть.
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*/
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struct ReplicatedMergeTreeQuorumEntry
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{
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String part_name;
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size_t required_number_of_replicas;
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std::set<String> replicas;
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void writeText(WriteBuffer & out) const
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{
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out << "version: 1\n"
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<< "part_name: " << part_name << "\n"
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<< "required_number_of_replicas: " << required_number_of_replicas << "\n"
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<< "actual_number_of_replicas: " << replicas.size() << "\n"
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<< "replicas:\n";
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for (const auto & replica : replicas)
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out << escape << replica << "\n";
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}
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void readText(ReadBuffer & in)
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{
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size_t actual_number_of_replicas = 0;
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in >> "version: 1\n"
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>> "part_name: " >> part_name >> "\n"
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>> "required_number_of_replicas: " >> required_number_of_replicas >> "\n"
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>> "actual_number_of_replicas: " >> actual_number_of_replicas >> "\n"
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>> "replicas:\n";
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for (size_t i = 0; i < actual_number_of_replicas; ++i)
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{
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String replica;
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in >> escape >> replica >> "\n";
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replicas.insert(replica);
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}
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}
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String toString() const
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{
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String res;
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{
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WriteBufferFromString out(res);
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writeText(out);
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}
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return res;
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}
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void fromString(const String & str)
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{
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ReadBufferFromString in(str);
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readText(in);
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}
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};
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}
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