8948dc8524
Summary: The ImmutableCFOptions contained a bunch of fields that belonged to the ImmutableDBOptions. This change cleans that up by introducing an ImmutableOptions struct. Following the pattern of Options struct, this class inherits from the DB and CFOption structs (of the Immutable form). Only one structural change (the ImmutableCFOptions::fs was changed to a shared_ptr from a raw one) is in this PR. All of the other changes involve moving the member variables from the ImmutableCFOptions into the ImmutableOptions and changing member variables or function parameters as required for compilation purposes. Follow-on PRs may do a further clean-up of the code, such as renaming variables (such as "ImmutableOptions cf_options") and potentially eliminating un-needed function parameters (there is no longer a need to pass both an ImmutableDBOptions and an ImmutableOptions to a function). Pull Request resolved: https://github.com/facebook/rocksdb/pull/8262 Reviewed By: pdillinger Differential Revision: D28226540 Pulled By: mrambacher fbshipit-source-id: 18ae71eadc879dedbe38b1eb8e6f9ff5c7147dbf
86 lines
3.1 KiB
C++
86 lines
3.1 KiB
C++
// 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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#pragma once
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#include <cinttypes>
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#include <memory>
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#include "file/random_access_file_reader.h"
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#include "rocksdb/compression_type.h"
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#include "rocksdb/rocksdb_namespace.h"
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namespace ROCKSDB_NAMESPACE {
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class Status;
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struct ImmutableOptions;
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struct FileOptions;
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class HistogramImpl;
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struct ReadOptions;
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class Slice;
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class PinnableSlice;
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class BlobFileReader {
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public:
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static Status Create(const ImmutableOptions& immutable_options,
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const FileOptions& file_options,
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uint32_t column_family_id,
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HistogramImpl* blob_file_read_hist,
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uint64_t blob_file_number,
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const std::shared_ptr<IOTracer>& io_tracer,
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std::unique_ptr<BlobFileReader>* reader);
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BlobFileReader(const BlobFileReader&) = delete;
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BlobFileReader& operator=(const BlobFileReader&) = delete;
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~BlobFileReader();
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Status GetBlob(const ReadOptions& read_options, const Slice& user_key,
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uint64_t offset, uint64_t value_size,
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CompressionType compression_type, PinnableSlice* value,
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uint64_t* bytes_read) const;
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private:
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BlobFileReader(std::unique_ptr<RandomAccessFileReader>&& file_reader,
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uint64_t file_size, CompressionType compression_type);
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static Status OpenFile(const ImmutableOptions& immutable_options,
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const FileOptions& file_opts,
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HistogramImpl* blob_file_read_hist,
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uint64_t blob_file_number,
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const std::shared_ptr<IOTracer>& io_tracer,
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uint64_t* file_size,
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std::unique_ptr<RandomAccessFileReader>* file_reader);
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static Status ReadHeader(const RandomAccessFileReader* file_reader,
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uint32_t column_family_id,
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CompressionType* compression_type);
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static Status ReadFooter(uint64_t file_size,
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const RandomAccessFileReader* file_reader);
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using Buffer = std::unique_ptr<char[]>;
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static Status ReadFromFile(const RandomAccessFileReader* file_reader,
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uint64_t read_offset, size_t read_size,
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Slice* slice, Buffer* buf,
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AlignedBuf* aligned_buf);
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static Status VerifyBlob(const Slice& record_slice, const Slice& user_key,
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uint64_t value_size);
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static Status UncompressBlobIfNeeded(const Slice& value_slice,
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CompressionType compression_type,
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PinnableSlice* value);
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static void SaveValue(const Slice& src, PinnableSlice* dst);
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std::unique_ptr<RandomAccessFileReader> file_reader_;
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uint64_t file_size_;
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CompressionType compression_type_;
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};
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} // namespace ROCKSDB_NAMESPACE
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