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rocksdb/db/db_impl_readonly.h

80 lines
2.4 KiB

// Copyright (c) 2012 Facebook. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef STORAGE_LEVELDB_DB_DB_IMPL_READONLY_H_
#define STORAGE_LEVELDB_DB_DB_IMPL_READONLY_H_
#include "db/db_impl.h"
#include <deque>
#include <set>
#include "db/dbformat.h"
#include "db/log_writer.h"
#include "db/snapshot.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "port/port.h"
#include "util/stats_logger.h"
#ifdef USE_SCRIBE
#include "scribe/scribe_logger.h"
#endif
namespace leveldb {
class DBImplReadOnly : public DBImpl {
public:
DBImplReadOnly(const Options& options, const std::string& dbname);
virtual ~DBImplReadOnly();
// Implementations of the DB interface
virtual Status Get(const ReadOptions& options,
const Slice& key,
std::string* value);
// TODO: Implement ReadOnly MultiGet?
virtual Iterator* NewIterator(const ReadOptions&);
virtual Status Put(const WriteOptions&, const Slice& key, const Slice& value) {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status Merge(const WriteOptions&, const Slice& key,
const Slice& value) {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status Delete(const WriteOptions&, const Slice& key) {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status Write(const WriteOptions& options, WriteBatch* updates) {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual void CompactRange(const Slice* begin, const Slice* end,
bool reduce_level = false, int target_level = -1) {
}
virtual Status DisableFileDeletions() {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status EnableFileDeletions() {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status GetLiveFiles(std::vector<std::string>&,
uint64_t* manifest_file_size) {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status Flush(const FlushOptions& options) {
return Status::NotSupported("Not supported operation in read only mode.");
}
private:
friend class DB;
// No copying allowed
DBImplReadOnly(const DBImplReadOnly&);
void operator=(const DBImplReadOnly&);
};
}
#endif