mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-27 02:44:18 +00:00
9ed928e7a9
Summary: Use ImmutableDBOptions/MutableDBOptions internally and DBOptions only for user-facing APIs. MutableDBOptions is barely a placeholder for now. I'll start to move options to MutableDBOptions in following diffs. Test Plan: make all check Reviewers: yhchiang, IslamAbdelRahman, sdong Reviewed By: sdong Subscribers: andrewkr, dhruba, leveldb Differential Revision: https://reviews.facebook.net/D64065
128 lines
4.3 KiB
C++
128 lines
4.3 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
#pragma once
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
#include <vector>
|
|
|
|
#include "db/filename.h"
|
|
#include "db/log_reader.h"
|
|
#include "db/version_set.h"
|
|
#include "port/port.h"
|
|
#include "rocksdb/env.h"
|
|
#include "rocksdb/options.h"
|
|
#include "rocksdb/transaction_log.h"
|
|
#include "rocksdb/types.h"
|
|
#include "util/db_options.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class LogFileImpl : public LogFile {
|
|
public:
|
|
LogFileImpl(uint64_t logNum, WalFileType logType, SequenceNumber startSeq,
|
|
uint64_t sizeBytes) :
|
|
logNumber_(logNum),
|
|
type_(logType),
|
|
startSequence_(startSeq),
|
|
sizeFileBytes_(sizeBytes) {
|
|
}
|
|
|
|
std::string PathName() const override {
|
|
if (type_ == kArchivedLogFile) {
|
|
return ArchivedLogFileName("", logNumber_);
|
|
}
|
|
return LogFileName("", logNumber_);
|
|
}
|
|
|
|
uint64_t LogNumber() const override { return logNumber_; }
|
|
|
|
WalFileType Type() const override { return type_; }
|
|
|
|
SequenceNumber StartSequence() const override { return startSequence_; }
|
|
|
|
uint64_t SizeFileBytes() const override { return sizeFileBytes_; }
|
|
|
|
bool operator < (const LogFile& that) const {
|
|
return LogNumber() < that.LogNumber();
|
|
}
|
|
|
|
private:
|
|
uint64_t logNumber_;
|
|
WalFileType type_;
|
|
SequenceNumber startSequence_;
|
|
uint64_t sizeFileBytes_;
|
|
|
|
};
|
|
|
|
class TransactionLogIteratorImpl : public TransactionLogIterator {
|
|
public:
|
|
TransactionLogIteratorImpl(
|
|
const std::string& dir, const ImmutableDBOptions* options,
|
|
const TransactionLogIterator::ReadOptions& read_options,
|
|
const EnvOptions& soptions, const SequenceNumber seqNum,
|
|
std::unique_ptr<VectorLogPtr> files, VersionSet const* const versions);
|
|
|
|
virtual bool Valid() override;
|
|
|
|
virtual void Next() override;
|
|
|
|
virtual Status status() override;
|
|
|
|
virtual BatchResult GetBatch() override;
|
|
|
|
private:
|
|
const std::string& dir_;
|
|
const ImmutableDBOptions* options_;
|
|
const TransactionLogIterator::ReadOptions read_options_;
|
|
const EnvOptions& soptions_;
|
|
SequenceNumber startingSequenceNumber_;
|
|
std::unique_ptr<VectorLogPtr> files_;
|
|
bool started_;
|
|
bool isValid_; // not valid when it starts of.
|
|
Status currentStatus_;
|
|
size_t currentFileIndex_;
|
|
std::unique_ptr<WriteBatch> currentBatch_;
|
|
unique_ptr<log::Reader> currentLogReader_;
|
|
Status OpenLogFile(const LogFile* logFile,
|
|
unique_ptr<SequentialFileReader>* file);
|
|
|
|
struct LogReporter : public log::Reader::Reporter {
|
|
Env* env;
|
|
Logger* info_log;
|
|
virtual void Corruption(size_t bytes, const Status& s) override {
|
|
Log(InfoLogLevel::ERROR_LEVEL, info_log,
|
|
"dropping %" ROCKSDB_PRIszt " bytes; %s", bytes,
|
|
s.ToString().c_str());
|
|
}
|
|
virtual void Info(const char* s) {
|
|
Log(InfoLogLevel::INFO_LEVEL, info_log, "%s", s);
|
|
}
|
|
} reporter_;
|
|
|
|
SequenceNumber currentBatchSeq_; // sequence number at start of current batch
|
|
SequenceNumber currentLastSeq_; // last sequence in the current batch
|
|
// Used only to get latest seq. num
|
|
// TODO(icanadi) can this be just a callback?
|
|
VersionSet const* const versions_;
|
|
|
|
// Reads from transaction log only if the writebatch record has been written
|
|
bool RestrictedRead(Slice* record, std::string* scratch);
|
|
// Seeks to startingSequenceNumber reading from startFileIndex in files_.
|
|
// If strict is set,then must get a batch starting with startingSequenceNumber
|
|
void SeekToStartSequence(uint64_t startFileIndex = 0, bool strict = false);
|
|
// Implementation of Next. SeekToStartSequence calls it internally with
|
|
// internal=true to let it find next entry even if it has to jump gaps because
|
|
// the iterator may start off from the first available entry but promises to
|
|
// be continuous after that
|
|
void NextImpl(bool internal = false);
|
|
// Check if batch is expected, else return false
|
|
bool IsBatchExpected(const WriteBatch* batch, SequenceNumber expectedSeq);
|
|
// Update current batch if a continuous batch is found, else return false
|
|
void UpdateCurrentWriteBatch(const Slice& record);
|
|
Status OpenLogReader(const LogFile* file);
|
|
};
|
|
} // namespace rocksdb
|
|
#endif // ROCKSDB_LITE
|