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rocksdb/db/db_impl_readonly.h

101 lines
3.5 KiB

// Copyright (c) 2013, 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.
//
// 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.
#pragma once
#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"
namespace rocksdb {
class DBImplReadOnly : public DBImpl {
public:
DBImplReadOnly(const Options& options, const std::string& dbname);
virtual ~DBImplReadOnly();
// Implementations of the DB interface
using DB::Get;
virtual Status Get(const ReadOptions& options,
const ColumnFamilyHandle& column_family, const Slice& key,
std::string* value);
// TODO: Implement ReadOnly MultiGet?
using DBImpl::NewIterator;
virtual Iterator* NewIterator(const ReadOptions&);
virtual Status NewIterators(
const ReadOptions& options,
const std::vector<ColumnFamilyHandle>& column_family,
std::vector<Iterator*>* iterators) {
// TODO
return Status::NotSupported("Not supported yet.");
}
using DBImpl::Put;
virtual Status Put(const WriteOptions& options,
const ColumnFamilyHandle& column_family, const Slice& key,
const Slice& value) {
return Status::NotSupported("Not supported operation in read only mode.");
}
using DBImpl::Merge;
virtual Status Merge(const WriteOptions& options,
const ColumnFamilyHandle& column_family, const Slice& key,
const Slice& value) {
return Status::NotSupported("Not supported operation in read only mode.");
}
using DBImpl::Delete;
virtual Status Delete(const WriteOptions& options,
const ColumnFamilyHandle& column_family,
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.");
}
using DBImpl::CompactRange;
virtual Status CompactRange(const ColumnFamilyHandle& column_family,
const Slice* begin, const Slice* end,
bool reduce_level = false, int target_level = -1) {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status DisableFileDeletions() {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status EnableFileDeletions(bool force) {
return Status::NotSupported("Not supported operation in read only mode.");
}
virtual Status GetLiveFiles(std::vector<std::string>&,
uint64_t* manifest_file_size,
bool flush_memtable = true) {
return Status::NotSupported("Not supported operation in read only mode.");
}
using DBImpl::Flush;
virtual Status Flush(const FlushOptions& options,
const ColumnFamilyHandle& column_family) {
return Status::NotSupported("Not supported operation in read only mode.");
}
private:
friend class DB;
// No copying allowed
DBImplReadOnly(const DBImplReadOnly&);
void operator=(const DBImplReadOnly&);
};
}