sync: Introduce ModelTypeRegistry and helpers

sync/engine/model_type_registry.h

Index: sync/engine/model_type_registry.h
diff --git a/sync/engine/model_type_registry.h b/sync/engine/model_type_registry.h
new file mode 100644
index 0000000000000000000000000000000000000000..d3b417c3be15ca08ddb53c2ab88ca7634d3ff920
--- /dev/null
+++ b/sync/engine/model_type_registry.h
@@ -0,0 +1,56 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.

[tim (not reviewing), 2014/01/08 19:33:42]

2014 (check other files)

[rlarocque, 2014/01/09 00:31:18]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_
+#define SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "sync/base/sync_export.h"
+#include "sync/internal_api/public/base/model_type.h"
+#include "sync/internal_api/public/engine/model_safe_worker.h"
+
+namespace syncer {
+
+class CommitterList;
+class UpdaterList;
+
+namespace syncable {
+class Directory;
+}  // namespace syncable
+
+class SYNC_EXPORT_PRIVATE ModelTypeRegistry {

[tim (not reviewing), 2014/01/08 19:33:42]

Class comment, and in same vein as the CommitterList comment, this Directory
wrapper belongs in sessions/, although you should read the rest of my comments
here and draw your own conclusion once the dust settles.

[rlarocque, 2014/01/09 00:31:18]

Added class comment.

+ public:
+  ModelTypeRegistry(
+      const std::vector<ModelSafeWorker*>& workers,
+      syncable::Directory* directory);
+  ~ModelTypeRegistry();
+
+  // Sets the set of enabled types.
+  void SetEnabledDirectoryTypes(const ModelSafeRoutingInfo& routing_info);
+
+  // Simple getters.
+  UpdaterList* updater_list();
+  CommitterList* committer_list();
+
+ private:
+  // Classes to manage the types hooked up to receive and commit sync data.
+  scoped_ptr<UpdaterList> updater_list_;
+  scoped_ptr<CommitterList> committer_list_;
+
+  // The known ModelSafeWorkers.
+  std::map<ModelSafeGroup, scoped_refptr<ModelSafeWorker> > workers_map_;
+
+  // The directory.  Not owned.
+  syncable::Directory* directory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ModelTypeRegistry);
+};
+
+}  // namespace syncer
+
+#endif // SYNC_ENGINE_MODEL_TYPE_REGISTRY_H_
+