Draft: InvalidationService

chrome/browser/sync/invalidation_frontend.h

 // 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 CHROME_BROWSER_SYNC_INVALIDATION_FRONTEND_H_
 #define CHROME_BROWSER_SYNC_INVALIDATION_FRONTEND_H_
 
 #include "sync/notifier/invalidation_util.h"
+#include "sync/notifier/invalidator_state.h"
 
 namespace syncer {
 class InvalidationHandler;
+class AckHandle;
 }  // namespace syncer
 
 // Interface for classes that handle invalidation registrations and send out
 // invalidations to register handlers.
 //
 // Invalidation clients should follow the pattern below:
 //
 // When starting the client:
 //
 //   frontend->RegisterInvalidationHandler(client_handler);
@@ skipping 63 matching lines @@
   // Sends an acknowledgement that an invalidation for |id| was successfully
   // handled.
   virtual void AcknowledgeInvalidation(const invalidation::ObjectId& id,
                                        const syncer::AckHandle& ack_handle) = 0;
 
   // Returns the current invalidator state.  When called from within
   // InvalidationHandler::OnInvalidatorStateChange(), this must return
   // the updated state.
   virtual syncer::InvalidatorState GetInvalidatorState() const = 0;
 
+  // Returns this client's unique ID.  Used to prevent this client from
+  // receiving notifications of commits it made itself.
+  virtual std::string GetInvalidatorClientId() const = 0;
+
  protected:
   virtual ~InvalidationFrontend() { }
 };
 
 #endif  // CHROME_BROWSER_SYNC_INVALIDATION_FRONTEND_H_