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146 lines
4.5 KiB
C++
146 lines
4.5 KiB
C++
#pragma once
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#include <Storages/MergeTree/MergeTreePartInfo.h>
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#include <Interpreters/InterserverIOHandler.h>
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#include <Storages/MergeTree/MergeTreeData.h>
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#include <Storages/IStorage_fwd.h>
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#include <IO/HashingWriteBuffer.h>
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#include <IO/copyData.h>
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#include <IO/ConnectionTimeouts.h>
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#include <Common/Throttler.h>
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namespace zkutil
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{
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class ZooKeeper;
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using ZooKeeperPtr = std::shared_ptr<ZooKeeper>;
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}
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namespace DB
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{
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class StorageReplicatedMergeTree;
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class PooledReadWriteBufferFromHTTP;
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namespace DataPartsExchange
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{
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/** Service for sending parts from the table *ReplicatedMergeTree.
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*/
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class Service final : public InterserverIOEndpoint
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{
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public:
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explicit Service(StorageReplicatedMergeTree & data_);
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Service(const Service &) = delete;
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Service & operator=(const Service &) = delete;
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std::string getId(const std::string & node_id) const override;
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void processQuery(const HTMLForm & params, ReadBuffer & body, WriteBuffer & out, HTTPServerResponse & response) override;
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private:
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MergeTreeData::DataPartPtr findPart(const String & name);
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void sendPartFromMemory(
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const MergeTreeData::DataPartPtr & part,
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WriteBuffer & out,
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bool send_projections);
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MergeTreeData::DataPart::Checksums sendPartFromDisk(
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const MergeTreeData::DataPartPtr & part,
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WriteBuffer & out,
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int client_protocol_version,
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bool from_remote_disk,
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bool send_projections);
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/// StorageReplicatedMergeTree::shutdown() waits for all parts exchange handlers to finish,
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/// so Service will never access dangling reference to storage
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StorageReplicatedMergeTree & data;
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Poco::Logger * log;
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};
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/** Client for getting the parts from the table *MergeTree.
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*/
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class Fetcher final : private boost::noncopyable
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{
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public:
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explicit Fetcher(StorageReplicatedMergeTree & data_);
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/// Downloads a part to tmp_directory. If to_detached - downloads to the `detached` directory.
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std::pair<MergeTreeData::MutableDataPartPtr, scope_guard> fetchSelectedPart(
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const StorageMetadataPtr & metadata_snapshot,
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ContextPtr context,
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const String & part_name,
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const String & zookeeper_name,
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const String & replica_path,
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const String & host,
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int port,
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const ConnectionTimeouts & timeouts,
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const String & user,
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const String & password,
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const String & interserver_scheme,
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ThrottlerPtr throttler,
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bool to_detached = false,
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const String & tmp_prefix_ = "",
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std::optional<CurrentlySubmergingEmergingTagger> * tagger_ptr = nullptr,
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bool try_zero_copy = true,
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DiskPtr dest_disk = nullptr);
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/// You need to stop the data transfer.
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ActionBlocker blocker;
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private:
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using OutputBufferGetter = std::function<std::unique_ptr<WriteBufferFromFileBase>(IDataPartStorage &, const String &, size_t)>;
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void downloadBaseOrProjectionPartToDisk(
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const String & replica_path,
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const MutableDataPartStoragePtr & data_part_storage,
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PooledReadWriteBufferFromHTTP & in,
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OutputBufferGetter output_buffer_getter,
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MergeTreeData::DataPart::Checksums & checksums,
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ThrottlerPtr throttler,
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bool sync) const;
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MergeTreeData::MutableDataPartPtr downloadPartToDisk(
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const String & part_name,
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const String & replica_path,
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bool to_detached,
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const String & tmp_prefix_,
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DiskPtr disk,
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bool to_remote_disk,
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PooledReadWriteBufferFromHTTP & in,
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OutputBufferGetter output_buffer_getter,
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size_t projections,
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ThrottlerPtr throttler,
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bool sync);
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MergeTreeData::MutableDataPartPtr downloadPartToMemory(
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MutableDataPartStoragePtr data_part_storage,
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const String & part_name,
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const MergeTreePartInfo & part_info,
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const UUID & part_uuid,
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const StorageMetadataPtr & metadata_snapshot,
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ContextPtr context,
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PooledReadWriteBufferFromHTTP & in,
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size_t projections,
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bool is_projection,
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ThrottlerPtr throttler);
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MergeTreeData::MutableDataPartPtr downloadPartToDiskRemoteMeta(
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const String & part_name,
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const String & replica_path,
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bool to_detached,
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const String & tmp_prefix_,
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DiskPtr disk,
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PooledReadWriteBufferFromHTTP & in,
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size_t projections,
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MergeTreeData::DataPart::Checksums & checksums,
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ThrottlerPtr throttler);
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StorageReplicatedMergeTree & data;
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Poco::Logger * log;
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};
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}
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}
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