ceph/src/rocksdb/db/write_callback.h

   1 // Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 #pragma once
   7
   8 #include "rocksdb/status.h"
   9
  10 namespace ROCKSDB_NAMESPACE {
  11
  12 class DB;
  13
  14 class WriteCallback {
  15  public:
  16   virtual ~WriteCallback() {}
  17
  18   // Will be called while on the write thread before the write executes.  If
  19   // this function returns a non-OK status, the write will be aborted and this
  20   // status will be returned to the caller of DB::Write().
  21   virtual Status Callback(DB* db) = 0;
  22
  23   // return true if writes with this callback can be batched with other writes
  24   virtual bool AllowWriteBatching() = 0;
  25 };
  26
  27 }  // namespace ROCKSDB_NAMESPACE