| // Copyright (c) 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_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_ |
| #define SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "base/gtest_prod_util.h" |
| #include "sync/engine/syncer_command.h" |
| #include "sync/internal_api/public/base/model_type.h" |
| #include "sync/internal_api/public/engine/model_safe_worker.h" |
| #include "sync/protocol/sync.pb.h" |
| |
| namespace sync_pb { |
| class EntitySpecifics; |
| } |
| |
| namespace syncer { |
| |
| // Determine the enabled datatypes, download a batch of updates for them |
| // from the server, place the result in the SyncSession for further processing. |
| // |
| // The main inputs to this operation are the download_progress state |
| // in the syncable::Directory, and the set of enabled types as indicated by |
| // the SyncSession. DownloadUpdatesCommand will fetch updates for |
| // all the enabled types, using download_progress to indicate the starting |
| // point to the server. DownloadUpdatesCommand stores the server response |
| // in the SyncSession. Only one server request is performed per Execute |
| // operation. A loop that causes multiple Execute operations within a sync |
| // session can be found in the Syncer logic. When looping, the |
| // DownloadUpdatesCommand consumes the information stored by the |
| // StoreTimestampsCommand. |
| // |
| // In practice, DownloadUpdatesCommand should loop until all updates are |
| // downloaded for all enabled datatypes (i.e., until the server indicates |
| // changes_remaining == 0 in the GetUpdates response), or until an error |
| // is encountered. |
| class DownloadUpdatesCommand : public SyncerCommand { |
| public: |
| // |create_mobile_bookmarks_folder| controls whether or not to |
| // create the mobile bookmarks folder if it's not already created. |
| // Should be set to true only by mobile clients. |
| explicit DownloadUpdatesCommand(bool create_mobile_bookmarks_folder); |
| virtual ~DownloadUpdatesCommand(); |
| |
| // SyncerCommand implementation. |
| virtual SyncerError ExecuteImpl(sessions::SyncSession* session) OVERRIDE; |
| |
| private: |
| FRIEND_TEST_ALL_PREFIXES(DownloadUpdatesCommandTest, VerifyAppendDebugInfo); |
| void AppendClientDebugInfoIfNeeded(sessions::SyncSession* session, |
| sync_pb::DebugInfo* debug_info); |
| |
| const bool create_mobile_bookmarks_folder_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DownloadUpdatesCommand); |
| }; |
| |
| } // namespace syncer |
| |
| #endif // SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_ |