components/sync_driver/generic_change_processor_factory.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 COMPONENTS_SYNC_DRIVER_GENERIC_CHANGE_PROCESSOR_FACTORY_H_
   6 #define COMPONENTS_SYNC_DRIVER_GENERIC_CHANGE_PROCESSOR_FACTORY_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9
  10 namespace syncer {
  11 class AttachmentService;
  12 class SyncableService;
  13 class SyncMergeResult;
  14 struct UserShare;
  15 }
  16
  17 namespace sync_driver {
  18
  19 class DataTypeErrorHandler;
  20 class GenericChangeProcessor;
  21 class SyncApiComponentFactory;
  22
  23 // Because GenericChangeProcessors are created and used only from the model
  24 // thread, their lifetime is strictly shorter than other components like
  25 // DataTypeController, which live before / after communication with model
  26 // threads begins and ends.
  27 // The GCP is created "on the fly" at just the right time, on just the right
  28 // thread. Given that, we use a factory to instantiate GenericChangeProcessors
  29 // so that tests can choose to use a fake processor (i.e instead of injection).
  30 // |sync_factory| is used to create AttachmentServicefor GenericChangeProcessor.
  31 // It is not retained after CreateGenericChangeProcessor exits.
  32 class GenericChangeProcessorFactory {
  33  public:
  34   GenericChangeProcessorFactory();
  35   virtual ~GenericChangeProcessorFactory();
  36   virtual scoped_ptr<GenericChangeProcessor> CreateGenericChangeProcessor(
  37       syncer::UserShare* user_share,
  38       DataTypeErrorHandler* error_handler,
  39       const base::WeakPtr<syncer::SyncableService>& local_service,
  40       const base::WeakPtr<syncer::SyncMergeResult>& merge_result,
  41       SyncApiComponentFactory* sync_factory);
  42
  43  private:
  44   DISALLOW_COPY_AND_ASSIGN(GenericChangeProcessorFactory);
  45 };
  46
  47 }  // namespace sync_driver
  48
  49 #endif  // COMPONENTS_SYNC_DRIVER_GENERIC_CHANGE_PROCESSOR_FACTORY_H_