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96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
#pragma once
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#include <DB/Storages/StorageReplicatedMergeTree.h>
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#include <DB/Storages/MergeTree/AbandonableLockInZooKeeper.h>
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namespace DB
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{
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class ReplicatedMergeTreeBlockOutputStream : public IBlockOutputStream
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{
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public:
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ReplicatedMergeTreeBlockOutputStream(StorageReplicatedMergeTree & storage_, const String & insert_id_)
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: storage(storage_), insert_id(insert_id_), block_index(0), log(&Logger::get("ReplicatedMergeTreeBlockOutputStream")) {}
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void write(const Block & block) override
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{
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auto part_blocks = storage.writer.splitBlockIntoParts(block);
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for (auto & current_block : part_blocks)
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{
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++block_index;
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String block_id = insert_id.empty() ? "" : insert_id + "__" + toString(block_index);
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AbandonableLockInZooKeeper block_number_lock(
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storage.zookeeper_path + "/block_numbers/block-",
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storage.zookeeper_path + "/temp", storage.zookeeper);
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UInt64 part_number = block_number_lock.getNumber();
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MergeTreeData::MutableDataPartPtr part = storage.writer.writeTempPart(current_block, part_number);
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String expected_checksums_str;
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if (!block_id.empty() && storage.zookeeper.tryGet(
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storage.zookeeper_path + "/blocks/" + block_id + "/checksums", expected_checksums_str))
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{
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LOG_INFO(log, "Block with this ID already exists; ignoring it");
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/// Блок с таким ID уже когда-то вставляли. Проверим чексуммы и не будем его вставлять.
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auto expected_checksums = MergeTreeData::DataPart::Checksums::parse(expected_checksums_str);
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expected_checksums.check(part->checksums);
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part->remove();
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/// Бросаем block_number_lock.
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continue;
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}
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storage.data.renameTempPartAndAdd(part);
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StorageReplicatedMergeTree::LogEntry log_entry;
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log_entry.type = StorageReplicatedMergeTree::LogEntry::GET_PART;
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log_entry.source_replica = storage.replica_name;
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log_entry.new_part_name = part->name;
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/// Одновременно добавим информацию о куске во все нужные места в ZooKeeper и снимем block_number_lock.
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zkutil::Ops ops;
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if (!block_id.empty())
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{
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ops.push_back(new zkutil::Op::Create(
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storage.zookeeper_path + "/blocks/" + block_id,
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"",
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storage.zookeeper.getDefaultACL(),
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zkutil::CreateMode::Persistent));
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ops.push_back(new zkutil::Op::Create(
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storage.zookeeper_path + "/blocks/" + block_id + "/checksums",
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part->checksums.toString(),
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storage.zookeeper.getDefaultACL(),
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zkutil::CreateMode::Persistent));
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ops.push_back(new zkutil::Op::Create(
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storage.zookeeper_path + "/blocks/" + block_id + "/number",
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toString(part_number),
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storage.zookeeper.getDefaultACL(),
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zkutil::CreateMode::Persistent));
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}
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storage.checkPartAndAddToZooKeeper(part, ops);
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ops.push_back(new zkutil::Op::Create(
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storage.replica_path + "/log/log-",
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log_entry.toString(),
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storage.zookeeper.getDefaultACL(),
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zkutil::CreateMode::PersistentSequential));
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block_number_lock.getUnlockOps(ops);
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storage.zookeeper.multi(ops);
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}
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}
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private:
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StorageReplicatedMergeTree & storage;
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String insert_id;
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size_t block_index;
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Logger * log;
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};
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}
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