9b083cb11c
Summary: The patch makes sure that the functionality required for the new integrated BlobDB implementation (most importantly, the classes related to reading and writing blob files) is also built in LITE mode by removing the corresponding `#ifndef`s. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7272 Test Plan: Ran `make check` in both regular and LITE mode. Reviewed By: zhichao-cao Differential Revision: D23173280 Pulled By: ltamasi fbshipit-source-id: 1596bd1a76409a8a6d83d8f1dbfe08bfdea7ffe6
104 lines
2.9 KiB
C++
104 lines
2.9 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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//
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#include "db/blob/blob_log_reader.h"
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#include <algorithm>
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#include "file/random_access_file_reader.h"
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#include "monitoring/statistics.h"
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#include "util/stop_watch.h"
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namespace ROCKSDB_NAMESPACE {
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BlobLogReader::BlobLogReader(
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std::unique_ptr<RandomAccessFileReader>&& file_reader, Env* env,
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Statistics* statistics)
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: file_(std::move(file_reader)),
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env_(env),
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statistics_(statistics),
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buffer_(),
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next_byte_(0) {}
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Status BlobLogReader::ReadSlice(uint64_t size, Slice* slice, char* buf) {
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StopWatch read_sw(env_, statistics_, BLOB_DB_BLOB_FILE_READ_MICROS);
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Status s = file_->Read(IOOptions(), next_byte_, static_cast<size_t>(size),
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slice, buf, nullptr);
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next_byte_ += size;
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if (!s.ok()) {
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return s;
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}
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RecordTick(statistics_, BLOB_DB_BLOB_FILE_BYTES_READ, slice->size());
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if (slice->size() != size) {
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return Status::Corruption("EOF reached while reading record");
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}
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return s;
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}
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Status BlobLogReader::ReadHeader(BlobLogHeader* header) {
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assert(file_.get() != nullptr);
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assert(next_byte_ == 0);
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Status s = ReadSlice(BlobLogHeader::kSize, &buffer_, header_buf_);
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if (!s.ok()) {
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return s;
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}
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if (buffer_.size() != BlobLogHeader::kSize) {
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return Status::Corruption("EOF reached before file header");
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}
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return header->DecodeFrom(buffer_);
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}
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Status BlobLogReader::ReadRecord(BlobLogRecord* record, ReadLevel level,
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uint64_t* blob_offset) {
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Status s = ReadSlice(BlobLogRecord::kHeaderSize, &buffer_, header_buf_);
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if (!s.ok()) {
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return s;
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}
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if (buffer_.size() != BlobLogRecord::kHeaderSize) {
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return Status::Corruption("EOF reached before record header");
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}
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s = record->DecodeHeaderFrom(buffer_);
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if (!s.ok()) {
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return s;
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}
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uint64_t kb_size = record->key_size + record->value_size;
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if (blob_offset != nullptr) {
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*blob_offset = next_byte_ + record->key_size;
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}
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switch (level) {
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case kReadHeader:
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next_byte_ += kb_size;
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break;
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case kReadHeaderKey:
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record->key_buf.reset(new char[record->key_size]);
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s = ReadSlice(record->key_size, &record->key, record->key_buf.get());
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next_byte_ += record->value_size;
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break;
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case kReadHeaderKeyBlob:
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record->key_buf.reset(new char[record->key_size]);
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s = ReadSlice(record->key_size, &record->key, record->key_buf.get());
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if (s.ok()) {
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record->value_buf.reset(new char[record->value_size]);
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s = ReadSlice(record->value_size, &record->value,
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record->value_buf.get());
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}
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if (s.ok()) {
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s = record->CheckBlobCRC();
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}
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break;
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}
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return s;
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}
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} // namespace ROCKSDB_NAMESPACE
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