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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_ | 5 #ifndef COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_ |
6 #define COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_ | 6 #define COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 namespace sync_pb { | 10 namespace sync_pb { |
11 class DataTypeState; | 11 class DataTypeState; |
12 class EntityMetadata; | 12 class EntityMetadata; |
13 } // namespace sync_pb | 13 } // namespace sync_pb |
14 | 14 |
15 namespace syncer_v2 { | 15 namespace syncer { |
16 | 16 |
17 // Interface used by the processor and service to communicate about metadata. | 17 // Interface used by the processor and service to communicate about metadata. |
18 // The purpose of the interface is to record changes to data type global and | 18 // The purpose of the interface is to record changes to data type global and |
19 // per entity metadata for the purpose of propagating changes to the datatype | 19 // per entity metadata for the purpose of propagating changes to the datatype |
20 // specific storage implementation. | 20 // specific storage implementation. |
21 // The implementation of the interface is supposed to keep the record of all | 21 // The implementation of the interface is supposed to keep the record of all |
22 // updated / deleted metadata records and provide a mechanism to enumerate | 22 // updated / deleted metadata records and provide a mechanism to enumerate |
23 // them. If there are multiple UpdateMetadata / ClearMetadata calls made for the | 23 // them. If there are multiple UpdateMetadata / ClearMetadata calls made for the |
24 // same metadata record the last one is supposed to win. | 24 // same metadata record the last one is supposed to win. |
25 class MetadataChangeList { | 25 class MetadataChangeList { |
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38 // Please note that the update might contain a deleted entry if | 38 // Please note that the update might contain a deleted entry if |
39 // metadata.is_deleted() is true (as opposed to clearing the entry from the | 39 // metadata.is_deleted() is true (as opposed to clearing the entry from the |
40 // storage completely by calling the Clear method). | 40 // storage completely by calling the Clear method). |
41 virtual void UpdateMetadata(const std::string& storage_key, | 41 virtual void UpdateMetadata(const std::string& storage_key, |
42 const sync_pb::EntityMetadata& metadata) = 0; | 42 const sync_pb::EntityMetadata& metadata) = 0; |
43 | 43 |
44 // Requests metadata entry to be cleared from the storage. | 44 // Requests metadata entry to be cleared from the storage. |
45 virtual void ClearMetadata(const std::string& storage_key) = 0; | 45 virtual void ClearMetadata(const std::string& storage_key) = 0; |
46 }; | 46 }; |
47 | 47 |
48 } // namespace syncer_v2 | 48 } // namespace syncer |
49 | 49 |
50 #endif // COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_ | 50 #endif // COMPONENTS_SYNC_API_METADATA_CHANGE_LIST_H_ |
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