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Revision 3d07b815f6b22e43873196156d276887bff2044b authored by Alexey Maykov on 15 September 2015, 16:03:08 UTC, committed by Alexey Maykov on 10 October 2015, 01:10:55 UTC 
Passing table properties to compaction callback
 
Summary: It would be nice to have and access to table properties in compaction callbacks. In MyRocks project, it will make possible to update optimizer statistics online.

Test Plan: ran the unit test. Ran myrocks with the new way of collecting stats.

Reviewers: igor, rven, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D48267
1 parent 64546af
Raw File
merge_operators.h 
//  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.
//
#ifndef MERGE_OPERATORS_H
#define MERGE_OPERATORS_H

#include <memory>
#include <stdio.h>

#include "rocksdb/merge_operator.h"

namespace rocksdb {

class MergeOperators {
 public:
  static std::shared_ptr<MergeOperator> CreatePutOperator();
  static std::shared_ptr<MergeOperator> CreateUInt64AddOperator();
  static std::shared_ptr<MergeOperator> CreateStringAppendOperator();
  static std::shared_ptr<MergeOperator> CreateStringAppendTESTOperator();

  // Will return a different merge operator depending on the string.
  // TODO: Hook the "name" up to the actual Name() of the MergeOperators?
  static std::shared_ptr<MergeOperator> CreateFromStringId(
      const std::string& name) {
    if (name == "put") {
      return CreatePutOperator();
    } else if ( name == "uint64add") {
      return CreateUInt64AddOperator();
    } else if (name == "stringappend") {
      return CreateStringAppendOperator();
    } else if (name == "stringappendtest") {
      return CreateStringAppendTESTOperator();
    } else {
      // Empty or unknown, just return nullptr
      return nullptr;
    }
  }

};

} // namespace rocksdb

#endif
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