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 the BSD-style license found in the
   3 // LICENSE file in the root directory of this source tree. An additional grant
   4 // of patent rights can be found in the PATENTS file in the same 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 {
  16
  17 class RemoveEmptyValueCompactionFilter : public CompactionFilter {
  18  public:
  19     const char* Name() const override;
  20     bool Filter(int level,
  21         const Slice& key,
  22         const Slice& existing_value,
  23         std::string* new_value,
  24         bool* value_changed) const override;
  25 };
  26 }  // namespace rocksdb
  27 #endif  // !ROCKSDB_LITE