mirror of https://github.com/facebook/rocksdb.git
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// Copyright (c) Meta Platforms, Inc. and affiliates.
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//
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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#include <unordered_set>
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#include <vector>
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#include "rocksdb/slice.h"
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#include "rocksdb/status.h"
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#include "rocksdb/write_batch.h"
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namespace ROCKSDB_NAMESPACE {
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// ColumnFamilyCollector is a write batch handler which does nothing
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// except recording unique column family IDs
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class ColumnFamilyCollector : public WriteBatch::Handler {
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std::unordered_set<uint32_t> column_family_ids_;
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Status AddColumnFamilyId(uint32_t column_family_id) {
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column_family_ids_.insert(column_family_id);
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return Status::OK();
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}
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public:
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explicit ColumnFamilyCollector() {}
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~ColumnFamilyCollector() override {}
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Status PutCF(uint32_t column_family_id, const Slice&, const Slice&) override {
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return AddColumnFamilyId(column_family_id);
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}
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Status DeleteCF(uint32_t column_family_id, const Slice&) override {
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return AddColumnFamilyId(column_family_id);
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}
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Status SingleDeleteCF(uint32_t column_family_id, const Slice&) override {
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return AddColumnFamilyId(column_family_id);
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}
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Status DeleteRangeCF(uint32_t column_family_id, const Slice&,
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const Slice&) override {
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return AddColumnFamilyId(column_family_id);
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}
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Status MergeCF(uint32_t column_family_id, const Slice&,
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const Slice&) override {
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return AddColumnFamilyId(column_family_id);
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}
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Status PutBlobIndexCF(uint32_t column_family_id, const Slice&,
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const Slice&) override {
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return AddColumnFamilyId(column_family_id);
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}
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Status MarkBeginPrepare(bool) override { return Status::OK(); }
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Status MarkEndPrepare(const Slice&) override { return Status::OK(); }
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Status MarkRollback(const Slice&) override { return Status::OK(); }
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Status MarkCommit(const Slice&) override { return Status::OK(); }
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Status MarkCommitWithTimestamp(const Slice&, const Slice&) override {
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return Status::OK();
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}
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Status MarkNoop(bool) override { return Status::OK(); }
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const std::unordered_set<uint32_t>& column_families() const {
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return column_family_ids_;
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}
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};
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Status CollectColumnFamilyIdsFromWriteBatch(
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const WriteBatch& batch, std::vector<uint32_t>* column_family_ids);
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} // namespace ROCKSDB_NAMESPACE
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