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bdf1085944
Summary: This diff simplifies EnvOptions by treating it as POD, similar to Options. - virtual functions are removed and member fields are accessed directly. - StorageOptions is removed. - Options.allow_readahead and Options.allow_readahead_compactions are deprecated. - Unused global variables are removed: useOsBuffer, useFsReadAhead, useMmapRead, useMmapWrite Test Plan: make check; db_stress Reviewers: dhruba CC: leveldb Differential Revision: https://reviews.facebook.net/D11175
67 lines
2 KiB
C++
67 lines
2 KiB
C++
// Copyright 2008-present Facebook. All Rights Reserved.
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#ifndef STORAGE_LEVELDB_INCLUDE_WRITES_ITERATOR_IMPL_H_
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#define STORAGE_LEVELDB_INCLUDE_WRITES_ITERATOR_IMPL_H_
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#include <vector>
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#include "leveldb/env.h"
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#include "leveldb/options.h"
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#include "leveldb/types.h"
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#include "leveldb/transaction_log_iterator.h"
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#include "db/log_file.h"
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#include "db/log_reader.h"
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namespace leveldb {
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struct LogReporter : public log::Reader::Reporter {
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Env* env;
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Logger* info_log;
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virtual void Corruption(size_t bytes, const Status& s) {
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Log(info_log, "dropping %zu bytes; %s", bytes, s.ToString().c_str());
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}
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};
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class TransactionLogIteratorImpl : public TransactionLogIterator {
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public:
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TransactionLogIteratorImpl(const std::string& dbname,
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const Options* options,
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const EnvOptions& soptions,
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SequenceNumber& seqNum,
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std::unique_ptr<std::vector<LogFile>> files,
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SequenceNumber const * const lastFlushedSequence);
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virtual bool Valid();
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virtual void Next();
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virtual Status status();
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virtual BatchResult GetBatch();
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private:
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const std::string& dbname_;
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const Options* options_;
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const EnvOptions& soptions_;
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const uint64_t startingSequenceNumber_;
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std::unique_ptr<std::vector<LogFile>> files_;
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bool started_;
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bool isValid_; // not valid when it starts of.
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Status currentStatus_;
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size_t currentFileIndex_;
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std::unique_ptr<WriteBatch> currentBatch_;
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unique_ptr<log::Reader> currentLogReader_;
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Status OpenLogFile(const LogFile& logFile, unique_ptr<SequentialFile>* file);
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LogReporter reporter_;
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SequenceNumber const * const lastFlushedSequence_;
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// represents the sequence number being read currently.
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SequenceNumber currentSequence_;
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void UpdateCurrentWriteBatch(const Slice& record);
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Status OpenLogReader(const LogFile& file);
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};
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} // namespace leveldb
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#endif // STORAGE_LEVELDB_INCLUDE_WRITES_ITERATOR_IMPL_H_
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