sync/engine/non_blocking_sync_common.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SYNC_ENGINE_NON_BLOCKING_SYNC_COMMON_H_
   6 #define SYNC_ENGINE_NON_BLOCKING_SYNC_COMMON_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/time/time.h"
  12 #include "sync/base/sync_export.h"
  13 #include "sync/protocol/sync.pb.h"
  14
  15 namespace syncer {
  16
  17 static const int64 kUncommittedVersion = -1;
  18
  19 // Data-type global state that must be accessed and updated on the sync thread,
  20 // but persisted on or through the model thread.
  21 struct SYNC_EXPORT_PRIVATE DataTypeState {
  22   DataTypeState();
  23   ~DataTypeState();
  24
  25   // The latest progress markers received from the server.
  26   sync_pb::DataTypeProgressMarker progress_marker;
  27
  28   // A data type context.  Sent to the server in every commit or update
  29   // request.  May be updated by either by responses from the server or
  30   // requests made on the model thread.  The interpretation of this value may
  31   // be data-type specific.  Many data types ignore it.
  32   sync_pb::DataTypeContext type_context;
  33
  34   // The ID of the folder node that sits at the top of this type's folder
  35   // hierarchy.  We keep this around for legacy reasons.  The protocol expects
  36   // that all nodes of a certain type are children of the same type root
  37   // entity.  This entity is delivered by the server, and may not be available
  38   // until the first download cycle has completed.
  39   std::string type_root_id;
  40
  41   // A strictly increasing counter used to generate unique values for the
  42   // client-assigned IDs.  The incrementing and ID assignment happens on the
  43   // sync thread, but we store the value here so we can pass it back to the
  44   // model thread for persistence.  This is probably unnecessary for the
  45   // client-tagged data types supported by non-blocking sync, but we will
  46   // continue to emulate the directory sync's behavior for now.
  47   int64 next_client_id;
  48
  49   // This flag is set to true when the first download cycle is complete.  The
  50   // ModelTypeSyncProxy should not attempt to commit any items until this
  51   // flag is set.
  52   bool initial_sync_done;
  53 };
  54
  55 struct SYNC_EXPORT_PRIVATE CommitRequestData {
  56   CommitRequestData();
  57   ~CommitRequestData();
  58
  59   std::string id;
  60   std::string client_tag_hash;
  61
  62   // Strictly incrementing number for in-progress commits.  More information
  63   // about its meaning can be found in comments in the files that make use of
  64   // this struct.
  65   int64 sequence_number;
  66
  67   int64 base_version;
  68   base::Time ctime;
  69   base::Time mtime;
  70   std::string non_unique_name;
  71   bool deleted;
  72   sync_pb::EntitySpecifics specifics;
  73 };
  74
  75 struct SYNC_EXPORT_PRIVATE CommitResponseData {
  76   CommitResponseData();
  77   ~CommitResponseData();
  78
  79   std::string id;
  80   std::string client_tag_hash;
  81   int64 sequence_number;
  82   int64 response_version;
  83 };
  84
  85 struct SYNC_EXPORT_PRIVATE UpdateResponseData {
  86   UpdateResponseData();
  87   ~UpdateResponseData();
  88
  89   std::string id;
  90   std::string client_tag_hash;
  91   int64 response_version;
  92   base::Time ctime;
  93   base::Time mtime;
  94   std::string non_unique_name;
  95   bool deleted;
  96   sync_pb::EntitySpecifics specifics;
  97 };
  98
  99 typedef std::vector<CommitRequestData> CommitRequestDataList;
 100 typedef std::vector<CommitResponseData> CommitResponseDataList;
 101 typedef std::vector<UpdateResponseData> UpdateResponseDataList;
 102
 103 }  // namespace syncer
 104
 105 #endif  // SYNC_ENGINE_NON_BLOCKING_SYNC_COMMON_H_