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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 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_SHARED_CHANGE_PROCESSOR_H_ | 5 #ifndef COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_ |
| 6 #define COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_ | 6 #define COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_ |
| 7 | 7 |
| 8 #include "base/location.h" | 8 #include "base/location.h" |
| 9 #include "base/memory/ref_counted.h" | 9 #include "base/memory/ref_counted.h" |
| 10 #include "base/memory/weak_ptr.h" | 10 #include "base/memory/weak_ptr.h" |
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| 22 class SyncableService; | 22 class SyncableService; |
| 23 struct UserShare; | 23 struct UserShare; |
| 24 } // namespace syncer | 24 } // namespace syncer |
| 25 | 25 |
| 26 namespace sync_driver { | 26 namespace sync_driver { |
| 27 | 27 |
| 28 class ChangeProcessor; | 28 class ChangeProcessor; |
| 29 class GenericChangeProcessor; | 29 class GenericChangeProcessor; |
| 30 class GenericChangeProcessorFactory; | 30 class GenericChangeProcessorFactory; |
| 31 class DataTypeErrorHandler; | 31 class DataTypeErrorHandler; |
| 32 class SyncApiComponentFactory; | 32 class SyncClient; |
| 33 | 33 |
| 34 // A ref-counted wrapper around a GenericChangeProcessor for use with datatypes | 34 // A ref-counted wrapper around a GenericChangeProcessor for use with datatypes |
| 35 // that don't live on the UI thread. | 35 // that don't live on the UI thread. |
| 36 // | 36 // |
| 37 // We need to make it refcounted as the ownership transfer from the | 37 // We need to make it refcounted as the ownership transfer from the |
| 38 // DataTypeController is dependent on threading, and hence racy. The | 38 // DataTypeController is dependent on threading, and hence racy. The |
| 39 // SharedChangeProcessor should be created on the UI thread, but should only be | 39 // SharedChangeProcessor should be created on the UI thread, but should only be |
| 40 // connected and used on the same thread as the datatype it interacts with. | 40 // connected and used on the same thread as the datatype it interacts with. |
| 41 // | 41 // |
| 42 // The only thread-safe method is Disconnect, which will disconnect from the | 42 // The only thread-safe method is Disconnect, which will disconnect from the |
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| 53 public: | 53 public: |
| 54 // Create an uninitialized SharedChangeProcessor. | 54 // Create an uninitialized SharedChangeProcessor. |
| 55 SharedChangeProcessor(); | 55 SharedChangeProcessor(); |
| 56 | 56 |
| 57 // Connect to the Syncer and prepare to handle changes for |type|. Will | 57 // Connect to the Syncer and prepare to handle changes for |type|. Will |
| 58 // create and store a new GenericChangeProcessor and return a weak pointer to | 58 // create and store a new GenericChangeProcessor and return a weak pointer to |
| 59 // the syncer::SyncableService associated with |type|. | 59 // the syncer::SyncableService associated with |type|. |
| 60 // Note: If this SharedChangeProcessor has been disconnected, or the | 60 // Note: If this SharedChangeProcessor has been disconnected, or the |
| 61 // syncer::SyncableService was not alive, will return a null weak pointer. | 61 // syncer::SyncableService was not alive, will return a null weak pointer. |
| 62 virtual base::WeakPtr<syncer::SyncableService> Connect( | 62 virtual base::WeakPtr<syncer::SyncableService> Connect( |
| 63 SyncApiComponentFactory* sync_factory, | 63 SyncClient* sync_client, |
| 64 GenericChangeProcessorFactory* processor_factory, | 64 GenericChangeProcessorFactory* processor_factory, |
| 65 syncer::UserShare* user_share, | 65 syncer::UserShare* user_share, |
| 66 DataTypeErrorHandler* error_handler, | 66 DataTypeErrorHandler* error_handler, |
| 67 syncer::ModelType type, | 67 syncer::ModelType type, |
| 68 const base::WeakPtr<syncer::SyncMergeResult>& merge_result); | 68 const base::WeakPtr<syncer::SyncMergeResult>& merge_result); |
| 69 | 69 |
| 70 // Disconnects from the generic change processor. May be called from any | 70 // Disconnects from the generic change processor. May be called from any |
| 71 // thread. After this, all attempts to interact with the change processor by | 71 // thread. After this, all attempts to interact with the change processor by |
| 72 // |local_service_| are dropped and return errors. The syncer will be safe to | 72 // |local_service_| are dropped and return errors. The syncer will be safe to |
| 73 // shut down from the point of view of this datatype. | 73 // shut down from the point of view of this datatype. |
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| 133 GenericChangeProcessor* generic_change_processor_; | 133 GenericChangeProcessor* generic_change_processor_; |
| 134 | 134 |
| 135 DataTypeErrorHandler* error_handler_; | 135 DataTypeErrorHandler* error_handler_; |
| 136 | 136 |
| 137 DISALLOW_COPY_AND_ASSIGN(SharedChangeProcessor); | 137 DISALLOW_COPY_AND_ASSIGN(SharedChangeProcessor); |
| 138 }; | 138 }; |
| 139 | 139 |
| 140 } // namespace sync_driver | 140 } // namespace sync_driver |
| 141 | 141 |
| 142 #endif // COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_ | 142 #endif // COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_ |
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