mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-30 04:41:49 +00:00
b931f84e56
Summary: file_reader_writer.h and .cc contain several files and helper function, and it's hard to navigate. Separate it to multiple files and put them under file/ Pull Request resolved: https://github.com/facebook/rocksdb/pull/5803 Test Plan: Build whole project using make and cmake. Differential Revision: D17374550 fbshipit-source-id: 10efca907721e7a78ed25bbf74dc5410dea05987
90 lines
3 KiB
C++
90 lines
3 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
#include "rocksdb/sst_file_reader.h"
|
|
|
|
#include "db/db_iter.h"
|
|
#include "db/dbformat.h"
|
|
#include "file/random_access_file_reader.h"
|
|
#include "options/cf_options.h"
|
|
#include "table/get_context.h"
|
|
#include "table/table_builder.h"
|
|
#include "table/table_reader.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
struct SstFileReader::Rep {
|
|
Options options;
|
|
EnvOptions soptions;
|
|
ImmutableCFOptions ioptions;
|
|
MutableCFOptions moptions;
|
|
|
|
std::unique_ptr<TableReader> table_reader;
|
|
|
|
Rep(const Options& opts)
|
|
: options(opts),
|
|
soptions(options),
|
|
ioptions(options),
|
|
moptions(ColumnFamilyOptions(options)) {}
|
|
};
|
|
|
|
SstFileReader::SstFileReader(const Options& options) : rep_(new Rep(options)) {}
|
|
|
|
SstFileReader::~SstFileReader() {}
|
|
|
|
Status SstFileReader::Open(const std::string& file_path) {
|
|
auto r = rep_.get();
|
|
Status s;
|
|
uint64_t file_size = 0;
|
|
std::unique_ptr<RandomAccessFile> file;
|
|
std::unique_ptr<RandomAccessFileReader> file_reader;
|
|
s = r->options.env->GetFileSize(file_path, &file_size);
|
|
if (s.ok()) {
|
|
s = r->options.env->NewRandomAccessFile(file_path, &file, r->soptions);
|
|
}
|
|
if (s.ok()) {
|
|
file_reader.reset(new RandomAccessFileReader(std::move(file), file_path));
|
|
}
|
|
if (s.ok()) {
|
|
TableReaderOptions t_opt(r->ioptions, r->moptions.prefix_extractor.get(),
|
|
r->soptions, r->ioptions.internal_comparator);
|
|
// Allow open file with global sequence number for backward compatibility.
|
|
t_opt.largest_seqno = kMaxSequenceNumber;
|
|
s = r->options.table_factory->NewTableReader(t_opt, std::move(file_reader),
|
|
file_size, &r->table_reader);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Iterator* SstFileReader::NewIterator(const ReadOptions& options) {
|
|
auto r = rep_.get();
|
|
auto sequence = options.snapshot != nullptr
|
|
? options.snapshot->GetSequenceNumber()
|
|
: kMaxSequenceNumber;
|
|
auto internal_iter = r->table_reader->NewIterator(
|
|
options, r->moptions.prefix_extractor.get(), /*arena=*/nullptr,
|
|
/*skip_filters=*/false, TableReaderCaller::kSSTFileReader);
|
|
return NewDBIterator(r->options.env, options, r->ioptions, r->moptions,
|
|
r->ioptions.user_comparator, internal_iter, sequence,
|
|
r->moptions.max_sequential_skip_in_iterations,
|
|
nullptr /* read_callback */);
|
|
}
|
|
|
|
std::shared_ptr<const TableProperties> SstFileReader::GetTableProperties()
|
|
const {
|
|
return rep_->table_reader->GetTableProperties();
|
|
}
|
|
|
|
Status SstFileReader::VerifyChecksum(const ReadOptions& read_options) {
|
|
return rep_->table_reader->VerifyChecksum(read_options,
|
|
TableReaderCaller::kSSTFileReader);
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|
|
#endif // !ROCKSDB_LITE
|