fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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228 lines
9.0 KiB
228 lines
9.0 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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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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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once
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#include <stdint.h>
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#include <string>
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#include <utility>
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#include <vector>
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#include "db/dbformat.h"
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#include "db/table_properties_collector.h"
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#include "file/writable_file_writer.h"
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#include "options/cf_options.h"
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#include "rocksdb/options.h"
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#include "rocksdb/table_properties.h"
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#include "trace_replay/block_cache_tracer.h"
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namespace ROCKSDB_NAMESPACE {
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class Slice;
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class Status;
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struct TableReaderOptions {
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// @param skip_filters Disables loading/accessing the filter block
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TableReaderOptions(const ImmutableOptions& _ioptions,
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const SliceTransform* _prefix_extractor,
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const EnvOptions& _env_options,
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const InternalKeyComparator& _internal_comparator,
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bool _skip_filters = false, bool _immortal = false,
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bool _force_direct_prefetch = false, int _level = -1,
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BlockCacheTracer* const _block_cache_tracer = nullptr,
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size_t _max_file_size_for_l0_meta_pin = 0,
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const std::string& _cur_db_session_id = "",
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uint64_t _cur_file_num = 0)
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: TableReaderOptions(
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_ioptions, _prefix_extractor, _env_options, _internal_comparator,
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_skip_filters, _immortal, _force_direct_prefetch, _level,
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0 /* _largest_seqno */, _block_cache_tracer,
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_max_file_size_for_l0_meta_pin, _cur_db_session_id, _cur_file_num) {
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}
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// @param skip_filters Disables loading/accessing the filter block
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TableReaderOptions(const ImmutableOptions& _ioptions,
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const SliceTransform* _prefix_extractor,
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const EnvOptions& _env_options,
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const InternalKeyComparator& _internal_comparator,
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bool _skip_filters, bool _immortal,
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bool _force_direct_prefetch, int _level,
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SequenceNumber _largest_seqno,
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BlockCacheTracer* const _block_cache_tracer,
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size_t _max_file_size_for_l0_meta_pin,
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const std::string& _cur_db_session_id,
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uint64_t _cur_file_num)
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: ioptions(_ioptions),
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prefix_extractor(_prefix_extractor),
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env_options(_env_options),
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internal_comparator(_internal_comparator),
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skip_filters(_skip_filters),
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immortal(_immortal),
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force_direct_prefetch(_force_direct_prefetch),
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level(_level),
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largest_seqno(_largest_seqno),
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block_cache_tracer(_block_cache_tracer),
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max_file_size_for_l0_meta_pin(_max_file_size_for_l0_meta_pin),
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cur_db_session_id(_cur_db_session_id),
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cur_file_num(_cur_file_num) {}
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const ImmutableOptions& ioptions;
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const SliceTransform* prefix_extractor;
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const EnvOptions& env_options;
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const InternalKeyComparator& internal_comparator;
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// This is only used for BlockBasedTable (reader)
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bool skip_filters;
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// Whether the table will be valid as long as the DB is open
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bool immortal;
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// When data prefetching is needed, even if direct I/O is off, read data to
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// fetch into RocksDB's buffer, rather than relying
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// RandomAccessFile::Prefetch().
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bool force_direct_prefetch;
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// What level this table/file is on, -1 for "not set, don't know." Used
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// for level-specific statistics.
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int level;
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// largest seqno in the table
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SequenceNumber largest_seqno;
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BlockCacheTracer* const block_cache_tracer;
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// Largest L0 file size whose meta-blocks may be pinned (can be zero when
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// unknown).
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const size_t max_file_size_for_l0_meta_pin;
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std::string cur_db_session_id;
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uint64_t cur_file_num;
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};
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struct TableBuilderOptions {
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TableBuilderOptions(
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const ImmutableOptions& _ioptions, const MutableCFOptions& _moptions,
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const InternalKeyComparator& _internal_comparator,
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const IntTblPropCollectorFactories* _int_tbl_prop_collector_factories,
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CompressionType _compression_type,
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const CompressionOptions& _compression_opts, uint32_t _column_family_id,
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const std::string& _column_family_name, int _level,
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bool _is_bottommost = false,
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TableFileCreationReason _reason = TableFileCreationReason::kMisc,
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const uint64_t _creation_time = 0, const int64_t _oldest_key_time = 0,
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const uint64_t _file_creation_time = 0, const std::string& _db_id = "",
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const std::string& _db_session_id = "",
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const uint64_t _target_file_size = 0, const uint64_t _cur_file_num = 0)
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: ioptions(_ioptions),
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moptions(_moptions),
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internal_comparator(_internal_comparator),
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int_tbl_prop_collector_factories(_int_tbl_prop_collector_factories),
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compression_type(_compression_type),
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compression_opts(_compression_opts),
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column_family_id(_column_family_id),
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column_family_name(_column_family_name),
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creation_time(_creation_time),
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oldest_key_time(_oldest_key_time),
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target_file_size(_target_file_size),
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file_creation_time(_file_creation_time),
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db_id(_db_id),
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db_session_id(_db_session_id),
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level_at_creation(_level),
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is_bottommost(_is_bottommost),
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reason(_reason),
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cur_file_num(_cur_file_num) {}
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const ImmutableOptions& ioptions;
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const MutableCFOptions& moptions;
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const InternalKeyComparator& internal_comparator;
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const IntTblPropCollectorFactories* int_tbl_prop_collector_factories;
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const CompressionType compression_type;
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const CompressionOptions& compression_opts;
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const uint32_t column_family_id;
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const std::string& column_family_name;
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const uint64_t creation_time;
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const int64_t oldest_key_time;
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const uint64_t target_file_size;
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const uint64_t file_creation_time;
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const std::string db_id;
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const std::string db_session_id;
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// BEGIN for FilterBuildingContext
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const int level_at_creation;
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const bool is_bottommost;
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const TableFileCreationReason reason;
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// END for FilterBuildingContext
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// XXX: only used by BlockBasedTableBuilder for SstFileWriter. If you
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// want to skip filters, that should be (for example) null filter_policy
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// in the table options of the ioptions.table_factory
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bool skip_filters = false;
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const uint64_t cur_file_num;
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};
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// TableBuilder provides the interface used to build a Table
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// (an immutable and sorted map from keys to values).
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//
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// Multiple threads can invoke const methods on a TableBuilder without
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// external synchronization, but if any of the threads may call a
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// non-const method, all threads accessing the same TableBuilder must use
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// external synchronization.
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class TableBuilder {
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public:
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// REQUIRES: Either Finish() or Abandon() has been called.
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virtual ~TableBuilder() {}
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// Add key,value to the table being constructed.
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// REQUIRES: key is after any previously added key according to comparator.
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// REQUIRES: Finish(), Abandon() have not been called
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virtual void Add(const Slice& key, const Slice& value) = 0;
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// Return non-ok iff some error has been detected.
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virtual Status status() const = 0;
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// Return non-ok iff some error happens during IO.
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virtual IOStatus io_status() const = 0;
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// Finish building the table.
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// REQUIRES: Finish(), Abandon() have not been called
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virtual Status Finish() = 0;
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// Indicate that the contents of this builder should be abandoned.
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// If the caller is not going to call Finish(), it must call Abandon()
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// before destroying this builder.
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// REQUIRES: Finish(), Abandon() have not been called
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virtual void Abandon() = 0;
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// Number of calls to Add() so far.
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virtual uint64_t NumEntries() const = 0;
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// Whether the output file is completely empty. It has neither entries
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// or tombstones.
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virtual bool IsEmpty() const {
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return NumEntries() == 0 && GetTableProperties().num_range_deletions == 0;
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}
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// Size of the file generated so far. If invoked after a successful
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// Finish() call, returns the size of the final generated file.
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virtual uint64_t FileSize() const = 0;
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// Estimated size of the file generated so far. This is used when
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// FileSize() cannot estimate final SST size, e.g. parallel compression
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// is enabled.
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virtual uint64_t EstimatedFileSize() const { return FileSize(); }
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// If the user defined table properties collector suggest the file to
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// be further compacted.
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virtual bool NeedCompact() const { return false; }
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// Returns table properties
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virtual TableProperties GetTableProperties() const = 0;
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// Return file checksum
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virtual std::string GetFileChecksum() const = 0;
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// Return file checksum function name
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virtual const char* GetFileChecksumFuncName() const = 0;
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};
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} // namespace ROCKSDB_NAMESPACE
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