ceph/src/rocksdb/db/blob/blob_file_garbage.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 <cstdint>
   9 #include <iosfwd>
  10 #include <string>
  11
  12 #include "db/blob/blob_constants.h"
  13 #include "rocksdb/rocksdb_namespace.h"
  14
  15 namespace ROCKSDB_NAMESPACE {
  16
  17 class JSONWriter;
  18 class Slice;
  19 class Status;
  20
  21 class BlobFileGarbage {
  22  public:
  23   BlobFileGarbage() = default;
  24
  25   BlobFileGarbage(uint64_t blob_file_number, uint64_t garbage_blob_count,
  26                   uint64_t garbage_blob_bytes)
  27       : blob_file_number_(blob_file_number),
  28         garbage_blob_count_(garbage_blob_count),
  29         garbage_blob_bytes_(garbage_blob_bytes) {}
  30
  31   uint64_t GetBlobFileNumber() const { return blob_file_number_; }
  32   uint64_t GetGarbageBlobCount() const { return garbage_blob_count_; }
  33   uint64_t GetGarbageBlobBytes() const { return garbage_blob_bytes_; }
  34
  35   void EncodeTo(std::string* output) const;
  36   Status DecodeFrom(Slice* input);
  37
  38   std::string DebugString() const;
  39   std::string DebugJSON() const;
  40
  41  private:
  42   enum CustomFieldTags : uint32_t;
  43
  44   uint64_t blob_file_number_ = kInvalidBlobFileNumber;
  45   uint64_t garbage_blob_count_ = 0;
  46   uint64_t garbage_blob_bytes_ = 0;
  47 };
  48
  49 bool operator==(const BlobFileGarbage& lhs, const BlobFileGarbage& rhs);
  50 bool operator!=(const BlobFileGarbage& lhs, const BlobFileGarbage& rhs);
  51
  52 std::ostream& operator<<(std::ostream& os,
  53                          const BlobFileGarbage& blob_file_garbage);
  54 JSONWriter& operator<<(JSONWriter& jw,
  55                        const BlobFileGarbage& blob_file_garbage);
  56
  57 }  // namespace ROCKSDB_NAMESPACE