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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_DRIVER_BACKEND_MIGRATOR_H_ | 5 #ifndef COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_ |
6 #define COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_ | 6 #define COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/compiler_specific.h" | 10 #include "base/compiler_specific.h" |
11 #include "base/macros.h" | 11 #include "base/macros.h" |
12 #include "base/memory/weak_ptr.h" | 12 #include "base/memory/weak_ptr.h" |
13 #include "base/observer_list.h" | 13 #include "base/observer_list.h" |
14 #include "components/sync/base/model_type.h" | 14 #include "components/sync/base/model_type.h" |
15 #include "components/sync_driver/data_type_manager.h" | 15 #include "components/sync/driver/data_type_manager.h" |
16 | 16 |
17 namespace syncer { | 17 namespace syncer { |
18 struct UserShare; | 18 struct UserShare; |
19 } // namespace syncer | 19 } // namespace syncer |
20 | 20 |
21 namespace sync_driver { | 21 namespace sync_driver { |
22 class SyncService; | 22 class SyncService; |
23 } | 23 } |
24 | 24 |
25 namespace browser_sync { | 25 namespace browser_sync { |
26 | 26 |
27 // Interface for anything that wants to know when the migrator's state | 27 // Interface for anything that wants to know when the migrator's state |
28 // changes. | 28 // changes. |
29 class MigrationObserver { | 29 class MigrationObserver { |
30 public: | 30 public: |
31 virtual void OnMigrationStateChange() = 0; | 31 virtual void OnMigrationStateChange() = 0; |
32 | 32 |
33 protected: | 33 protected: |
34 virtual ~MigrationObserver(); | 34 virtual ~MigrationObserver(); |
35 }; | 35 }; |
36 | 36 |
37 // A class to perform migration of a datatype pursuant to the 'MIGRATION_DONE' | 37 // A class to perform migration of a datatype pursuant to the 'MIGRATION_DONE' |
38 // code in the sync protocol definition (protocol/sync.proto). | 38 // code in the sync protocol definition (protocol/sync.proto). |
39 class BackendMigrator { | 39 class BackendMigrator { |
40 public: | 40 public: |
41 enum State { | 41 enum State { |
42 IDLE, | 42 IDLE, |
43 WAITING_TO_START, // Waiting for previous configuration to finish. | 43 WAITING_TO_START, // Waiting for previous configuration to finish. |
44 DISABLING_TYPES, // Exit criteria: SYNC_CONFIGURE_DONE for | 44 DISABLING_TYPES, // Exit criteria: SYNC_CONFIGURE_DONE for |
45 // enabled types _excluding_ |to_migrate_| and | 45 // enabled types _excluding_ |to_migrate_| and |
46 // empty download progress markers for types | 46 // empty download progress markers for types |
47 // in |to_migrate_|. | 47 // in |to_migrate_|. |
48 REENABLING_TYPES, // Exit criteria: SYNC_CONFIGURE_DONE for enabled | 48 REENABLING_TYPES, // Exit criteria: SYNC_CONFIGURE_DONE for enabled |
49 // types. | 49 // types. |
50 }; | 50 }; |
51 | 51 |
52 // TODO(akalin): Remove the dependency on |user_share|. | 52 // TODO(akalin): Remove the dependency on |user_share|. |
53 BackendMigrator(const std::string& name, | 53 BackendMigrator(const std::string& name, |
54 syncer::UserShare* user_share, | 54 syncer::UserShare* user_share, |
55 sync_driver::SyncService* service, | 55 sync_driver::SyncService* service, |
56 sync_driver::DataTypeManager* manager, | 56 sync_driver::DataTypeManager* manager, |
57 const base::Closure &migration_done_callback); | 57 const base::Closure& migration_done_callback); |
58 virtual ~BackendMigrator(); | 58 virtual ~BackendMigrator(); |
59 | 59 |
60 // Starts a sequence of events that will disable and reenable |types|. | 60 // Starts a sequence of events that will disable and reenable |types|. |
61 void MigrateTypes(syncer::ModelTypeSet types); | 61 void MigrateTypes(syncer::ModelTypeSet types); |
62 | 62 |
63 void AddMigrationObserver(MigrationObserver* observer); | 63 void AddMigrationObserver(MigrationObserver* observer); |
64 bool HasMigrationObserver(const MigrationObserver* observer) const; | 64 bool HasMigrationObserver(const MigrationObserver* observer) const; |
65 void RemoveMigrationObserver(MigrationObserver* observer); | 65 void RemoveMigrationObserver(MigrationObserver* observer); |
66 | 66 |
67 State state() const; | 67 State state() const; |
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104 base::Closure migration_done_callback_; | 104 base::Closure migration_done_callback_; |
105 | 105 |
106 base::WeakPtrFactory<BackendMigrator> weak_ptr_factory_; | 106 base::WeakPtrFactory<BackendMigrator> weak_ptr_factory_; |
107 | 107 |
108 DISALLOW_COPY_AND_ASSIGN(BackendMigrator); | 108 DISALLOW_COPY_AND_ASSIGN(BackendMigrator); |
109 }; | 109 }; |
110 | 110 |
111 } // namespace browser_sync | 111 } // namespace browser_sync |
112 | 112 |
113 #endif // COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_ | 113 #endif // COMPONENTS_SYNC_DRIVER_BACKEND_MIGRATOR_H_ |
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