mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-18 05:32:52 +00:00
86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
#pragma once
|
||
|
||
#include <DB/Interpreters/InterserverIOHandler.h>
|
||
#include <DB/Storages/MergeTree/MergeTreeData.h>
|
||
#include <DB/IO/ReadBufferFromHTTP.h>
|
||
#include <DB/IO/HashingWriteBuffer.h>
|
||
#include <DB/IO/copyData.h>
|
||
|
||
|
||
namespace DB
|
||
{
|
||
|
||
namespace DataPartsExchange
|
||
{
|
||
|
||
/** Сервис для отправки кусков из таблицы *MergeTree.
|
||
*/
|
||
class Service final : public InterserverIOEndpoint
|
||
{
|
||
public:
|
||
Service(MergeTreeData & data_, StoragePtr & storage_) : data(data_),
|
||
owned_storage(storage_), log(&Logger::get(data.getLogName() + " (Replicated PartsService)")) {}
|
||
|
||
Service(const Service &) = delete;
|
||
Service & operator=(const Service &) = delete;
|
||
|
||
std::string getId(const std::string & node_id) const override;
|
||
void processQuery(const Poco::Net::HTMLForm & params, ReadBuffer & body, WriteBuffer & out) override;
|
||
|
||
private:
|
||
MergeTreeData::DataPartPtr findPart(const String & name);
|
||
MergeTreeData::DataPartPtr findShardedPart(const String & name, size_t shard_no);
|
||
|
||
private:
|
||
MergeTreeData & data;
|
||
StoragePtr owned_storage;
|
||
Logger * log;
|
||
};
|
||
|
||
/** Клиент для получения кусков из таблицы *MergeTree.
|
||
*/
|
||
class Fetcher final
|
||
{
|
||
public:
|
||
Fetcher(MergeTreeData & data_) : data(data_), log(&Logger::get("Fetcher")) {}
|
||
|
||
Fetcher(const Fetcher &) = delete;
|
||
Fetcher & operator=(const Fetcher &) = delete;
|
||
|
||
/// Скачивает кусок в tmp_директорию. Если to_detached - скачивает в директорию detached.
|
||
MergeTreeData::MutableDataPartPtr fetchPart(
|
||
const String & part_name,
|
||
const String & replica_path,
|
||
const String & host,
|
||
int port,
|
||
bool to_detached = false);
|
||
|
||
/// Метод для перешардирования. Скачивает шардированный кусок
|
||
/// из заданного шарда в папку to_detached.
|
||
MergeTreeData::MutableDataPartPtr fetchShardedPart(
|
||
const InterserverIOEndpointLocation & location,
|
||
const String & part_name,
|
||
size_t shard_no);
|
||
|
||
void cancel() { is_cancelled = true; }
|
||
|
||
private:
|
||
MergeTreeData::MutableDataPartPtr fetchPartImpl(
|
||
const String & part_name,
|
||
const String & replica_path,
|
||
const String & host,
|
||
int port,
|
||
const String & shard_no,
|
||
bool to_detached);
|
||
|
||
private:
|
||
MergeTreeData & data;
|
||
/// Нужно остановить передачу данных.
|
||
std::atomic<bool> is_cancelled {false};
|
||
Logger * log;
|
||
};
|
||
|
||
}
|
||
|
||
}
|