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 #include "sync/internal_api/public/base/model_type.h"
  10
  11 namespace syncer {
  12 class AttachmentService;
  13 class SyncableService;
  14 class SyncMergeResult;
  15 struct UserShare;
  16 }
  17
  18 namespace sync_driver {
  19
  20 class DataTypeErrorHandler;
  21 class GenericChangeProcessor;
  22 class SyncApiComponentFactory;
  23
  24 // Because GenericChangeProcessors are created and used only from the model
  25 // thread, their lifetime is strictly shorter than other components like
  26 // DataTypeController, which live before / after communication with model
  27 // threads begins and ends.
  28 // The GCP is created "on the fly" at just the right time, on just the right
  29 // thread. Given that, we use a factory to instantiate GenericChangeProcessors
  30 // so that tests can choose to use a fake processor (i.e instead of injection).
  31 // |sync_factory| is used to create AttachmentServicefor GenericChangeProcessor.
  32 // It is not retained after CreateGenericChangeProcessor exits.
  33 class GenericChangeProcessorFactory {
  34  public:
  35   GenericChangeProcessorFactory();
  36   virtual ~GenericChangeProcessorFactory();
  37   virtual scoped_ptr<GenericChangeProcessor> CreateGenericChangeProcessor(
  38       syncer::ModelType type,
  39       syncer::UserShare* user_share,
  40       DataTypeErrorHandler* error_handler,
  41       const base::WeakPtr<syncer::SyncableService>& local_service,
  42       const base::WeakPtr<syncer::SyncMergeResult>& merge_result,
  43       SyncApiComponentFactory* sync_factory);
  44
  45  private:
  46   DISALLOW_COPY_AND_ASSIGN(GenericChangeProcessorFactory);
  47 };
  48
  49 }  // namespace sync_driver
  50
  51 #endif  // COMPONENTS_SYNC_DRIVER_GENERIC_CHANGE_PROCESSOR_FACTORY_H_