| // Copyright 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_ |
| #define SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_ |
| |
| #include "base/compiler_specific.h" |
| #include "sync/api/attachments/attachment_id.h" |
| #include "sync/base/sync_export.h" |
| #include "sync/internal_api/public/base_transaction.h" |
| |
| namespace tracked_objects { |
| class Location; |
| } // namespace tracked_objects |
| |
| namespace sync_pb { |
| class DataTypeContext; |
| } |
| |
| namespace syncer { |
| |
| struct UserShare; |
| |
| // Sync API's ReadTransaction is a read-only BaseTransaction. It wraps |
| // a syncable::ReadTransaction. |
| class SYNC_EXPORT ReadTransaction : public BaseTransaction { |
| public: |
| // Start a new read-only transaction on the specified repository. |
| ReadTransaction(const tracked_objects::Location& from_here, |
| UserShare* share); |
| |
| // Resume the middle of a transaction. Will not close transaction. |
| ReadTransaction(UserShare* share, syncable::BaseTransaction* trans); |
| |
| ~ReadTransaction() override; |
| |
| // BaseTransaction override. |
| syncable::BaseTransaction* GetWrappedTrans() const override; |
| |
| // Return |transaction_version| of |type| stored in sync directory's |
| // persisted info. |
| int64 GetModelVersion(ModelType type) const; |
| |
| // Fills |context| with the datatype context associated with |type|. |
| void GetDataTypeContext(ModelType type, |
| sync_pb::DataTypeContext* context) const; |
| |
| // Clears |id_set| and fills it with the ids of attachments that need to be |
| // uploaded to the sync server. |
| void GetAttachmentIdsToUpload(ModelType type, AttachmentIdSet* id_set); |
| |
| private: |
| void* operator new(size_t size); // Transaction is meant for stack use only. |
| |
| // The underlying syncable object which this class wraps. |
| syncable::BaseTransaction* transaction_; |
| bool close_transaction_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ReadTransaction); |
| }; |
| |
| } // namespace syncer |
| |
| #endif // SYNC_INTERNAL_API_PUBLIC_READ_TRANSACTION_H_ |