mirror of https://github.com/facebook/rocksdb.git
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
// 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) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#pragma once
|
|
|
|
namespace rocksdb {
|
|
|
|
class Slice;
|
|
class Status;
|
|
|
|
// TableBuilder provides the interface used to build a Table
|
|
// (an immutable and sorted map from keys to values).
|
|
//
|
|
// Multiple threads can invoke const methods on a TableBuilder without
|
|
// external synchronization, but if any of the threads may call a
|
|
// non-const method, all threads accessing the same TableBuilder must use
|
|
// external synchronization.
|
|
class TableBuilder {
|
|
public:
|
|
// REQUIRES: Either Finish() or Abandon() has been called.
|
|
virtual ~TableBuilder() {}
|
|
|
|
// Add key,value to the table being constructed.
|
|
// REQUIRES: key is after any previously added key according to comparator.
|
|
// REQUIRES: Finish(), Abandon() have not been called
|
|
virtual void Add(const Slice& key, const Slice& value) = 0;
|
|
|
|
// Return non-ok iff some error has been detected.
|
|
virtual Status status() const = 0;
|
|
|
|
// Finish building the table.
|
|
// REQUIRES: Finish(), Abandon() have not been called
|
|
virtual Status Finish() = 0;
|
|
|
|
// Indicate that the contents of this builder should be abandoned.
|
|
// If the caller is not going to call Finish(), it must call Abandon()
|
|
// before destroying this builder.
|
|
// REQUIRES: Finish(), Abandon() have not been called
|
|
virtual void Abandon() = 0;
|
|
|
|
// Number of calls to Add() so far.
|
|
virtual uint64_t NumEntries() const = 0;
|
|
|
|
// Size of the file generated so far. If invoked after a successful
|
|
// Finish() call, returns the size of the final generated file.
|
|
virtual uint64_t FileSize() const = 0;
|
|
};
|
|
|
|
} // namespace rocksdb
|