ceph/src/rocksdb/utilities/compaction_filters/remove_emptyvalue_compactionfilter.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 #ifndef ROCKSDB_LITE
   7
   8 #pragma once
   9
  10 #include <string>
  11
  12 #include "rocksdb/compaction_filter.h"
  13 #include "rocksdb/slice.h"
  14
  15 namespace ROCKSDB_NAMESPACE {
  16
  17 class RemoveEmptyValueCompactionFilter : public CompactionFilter {
  18  public:
  19   static const char* kClassName() { return "RemoveEmptyValueCompactionFilter"; }
  20
  21   const char* Name() const override { return kClassName(); }
  22
  23   bool Filter(int level, const Slice& key, const Slice& existing_value,
  24               std::string* new_value, bool* value_changed) const override;
  25 };
  26
  27 }  // namespace ROCKSDB_NAMESPACE
  28 #endif  // !ROCKSDB_LITE