1// Copyright 2014 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 COMPONENTS_INVALIDATION_ACK_HANDLE_H_ 6#define COMPONENTS_INVALIDATION_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 "components/invalidation/invalidation_export.h" 14 15namespace base { 16class DictionaryValue; 17} 18 19namespace syncer { 20 21// Opaque class that represents a local ack handle. We don't reuse the 22// invalidation ack handles to avoid unnecessary dependencies. 23class INVALIDATION_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 // COMPONENTS_INVALIDATION_ACK_HANDLE_H_ 48