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// Copyright 2015 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 NET_BASE_BACKOFF_ENTRY_SERIALIZER_H_
#define NET_BASE_BACKOFF_ENTRY_SERIALIZER_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/time.h"
#include "net/base/backoff_entry.h"
#include "net/base/net_export.h"
namespace base {
class Value;
class TickClock;
}
namespace net {
// Serialize or deserialize a BackoffEntry, so it can persist beyond the
// lifetime of the browser.
class NET_EXPORT BackoffEntrySerializer {
public:
// Serializes the release time and failure count into a ListValue that can
// later be passed to Deserialize to re-create the given BackoffEntry. The
// Policy is not serialized, instead callers must pass an identical Policy*
// when deserializing. |time_now| should be base::Time::Now(), except for
// tests that want to simulate time changes. The release time TimeTicks will
// be converted to an absolute timestamp, thus the time will continue counting
// down even whilst the device is powered off, and will be partially
// vulnerable to changes in the system clock time.
static scoped_ptr<base::Value> SerializeToValue(const BackoffEntry& entry,
base::Time time_now);
// Deserializes a ListValue back to a BackoffEntry. |policy| MUST be the same
// Policy as the serialized entry had. |clock| may be NULL. Both |policy| and
// |clock| (if not NULL) must enclose lifetime of the returned BackoffEntry.
// |time_now| should be base::Time::Now(), except for tests that want to
// simulate time changes. The absolute timestamp that was serialized will be
// converted back to TimeTicks as best as possible. Returns NULL if
// deserialization was unsuccessful.
static scoped_ptr<BackoffEntry> DeserializeFromValue(
const base::Value& serialized,
const BackoffEntry::Policy* policy,
base::TickClock* clock,
base::Time time_now);
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(BackoffEntrySerializer);
};
} // namespace net
#endif // NET_BASE_BACKOFF_ENTRY_SERIALIZER_H_
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