1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef SYNC_INTERNAL_API_PUBLIC_BASE_ACK_HANDLE_H 6 #define SYNC_INTERNAL_API_PUBLIC_BASE_ACK_HANDLE_H 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "base/time/time.h" 13 #include "sync/base/sync_export.h" 14 15 namespace base { 16 class DictionaryValue; 17 } 18 19 namespace syncer { 20 21 // Opaque class that represents a local ack handle. We don't reuse the 22 // invalidation ack handles to avoid unnecessary dependencies. 23 class SYNC_EXPORT AckHandle { 24 public: 25 static AckHandle CreateUnique(); 26 static AckHandle InvalidAckHandle(); 27 28 bool Equals(const AckHandle& other) const; 29 30 scoped_ptr<base::DictionaryValue> ToValue() const; 31 bool ResetFromValue(const base::DictionaryValue& value); 32 33 bool IsValid() const; 34 35 ~AckHandle(); 36 37 private: 38 // Explicitly copyable and assignable for STL containers. 39 AckHandle(const std::string& state, base::Time timestamp); 40 41 std::string state_; 42 base::Time timestamp_; 43 }; 44 45 } // namespace syncer 46 47 #endif // SYNC_INTERNAL_API_PUBLIC_BASE_ACK_HANDLE_H 48