mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-01 03:52:15 +00:00
79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
#pragma once
|
||
|
||
#include <DB/Core/Types.h>
|
||
#include <DB/IO/ReadBuffer.h>
|
||
#include <DB/IO/ReadBufferFromString.h>
|
||
#include <DB/IO/WriteBuffer.h>
|
||
#include <DB/IO/WriteBufferFromString.h>
|
||
#include <DB/IO/Operators.h>
|
||
#include <zkutil/ZooKeeper.h>
|
||
|
||
|
||
namespace DB
|
||
{
|
||
|
||
/** Для реализации функциональности "кворумная запись".
|
||
* Информация о том, на каких репликах появился вставленный кусок данных,
|
||
* и на скольких репликах он должен быть.
|
||
*/
|
||
struct ReplicatedMergeTreeQuorumEntry
|
||
{
|
||
String part_name;
|
||
size_t required_number_of_replicas;
|
||
std::set<String> replicas;
|
||
|
||
ReplicatedMergeTreeQuorumEntry() {}
|
||
ReplicatedMergeTreeQuorumEntry(const String & str)
|
||
{
|
||
fromString(str);
|
||
}
|
||
|
||
void writeText(WriteBuffer & out) const
|
||
{
|
||
out << "version: 1\n"
|
||
<< "part_name: " << part_name << "\n"
|
||
<< "required_number_of_replicas: " << required_number_of_replicas << "\n"
|
||
<< "actual_number_of_replicas: " << replicas.size() << "\n"
|
||
<< "replicas:\n";
|
||
|
||
for (const auto & replica : replicas)
|
||
out << escape << replica << "\n";
|
||
}
|
||
|
||
void readText(ReadBuffer & in)
|
||
{
|
||
size_t actual_number_of_replicas = 0;
|
||
|
||
in >> "version: 1\n"
|
||
>> "part_name: " >> part_name >> "\n"
|
||
>> "required_number_of_replicas: " >> required_number_of_replicas >> "\n"
|
||
>> "actual_number_of_replicas: " >> actual_number_of_replicas >> "\n"
|
||
>> "replicas:\n";
|
||
|
||
for (size_t i = 0; i < actual_number_of_replicas; ++i)
|
||
{
|
||
String replica;
|
||
in >> escape >> replica >> "\n";
|
||
replicas.insert(replica);
|
||
}
|
||
}
|
||
|
||
String toString() const
|
||
{
|
||
String res;
|
||
{
|
||
WriteBufferFromString out(res);
|
||
writeText(out);
|
||
}
|
||
return res;
|
||
}
|
||
|
||
void fromString(const String & str)
|
||
{
|
||
ReadBufferFromString in(str);
|
||
readText(in);
|
||
}
|
||
};
|
||
|
||
}
|