sync: Per-type update application

sync/engine/model_changing_syncer_command.cc

-// 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.
-
-#include "sync/engine/model_changing_syncer_command.h"
-
-#include "base/basictypes.h"
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "sync/sessions/status_controller.h"
-#include "sync/sessions/sync_session.h"
-
-namespace syncer {
-
-SyncerError ModelChangingSyncerCommand::ExecuteImpl(
-    sessions::SyncSession* session) {
-  work_session_ = session;
-  SyncerError result = SYNCER_OK;
-
-  const std::set<ModelSafeGroup>& groups_to_change =
-      GetGroupsToChange(*work_session_);
-  for (size_t i = 0; i < session->context()->workers().size(); ++i) {
-    ModelSafeWorker* worker = session->context()->workers()[i].get();
-    ModelSafeGroup group = worker->GetModelSafeGroup();
-    // Skip workers whose group isn't active.
-    if (groups_to_change.count(group) == 0u) {
-      DVLOG(2) << "Skipping worker for group "
-               << ModelSafeGroupToString(group);
-      continue;
-    }
-
-    sessions::StatusController* status =
-        work_session_->mutable_status_controller();
-    sessions::ScopedModelSafeGroupRestriction r(status, group);
-    WorkCallback c = base::Bind(
-        &ModelChangingSyncerCommand::StartChangingModel,
-        // We wait until the callback is executed. So it is safe to use
-        // unretained.
-        base::Unretained(this));
-
-    SyncerError this_worker_result = worker->DoWorkAndWaitUntilDone(c);
-    // TODO(rlarocque): Figure out a better way to deal with errors from
-    // multiple models at once.  See also: crbug.com/109422.
-    if (this_worker_result != SYNCER_OK)
-      result = this_worker_result;
-  }
-
-  return result;
-}
-
-}  // namespace syncer