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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SYNC_ENGINE_EVENTS_PROTOCOL_EVENT_H_
#define COMPONENTS_SYNC_ENGINE_EVENTS_PROTOCOL_EVENT_H_
#include <memory>
#include <string>
#include "base/time/time.h"
#include "base/values.h"
namespace syncer {
// SyncNetworkEvents represent a single client <-> server sync protocol event
// that recently took place. Sync protocol events occur when the client decides
// to send a sync protocol request (such as GetUpdates or Commit) to the server,
// and when the server responds. Note that the requests and responses themselves
// are modelled by {GetUpdates, Commit}x{Request,Response} objects.
//
// These objects are intended to be used for displaying information on
// chrome://sync-internals. They should be considered to be immutable and
// opaque. No program behavior should depend on their contents.
//
// Each type of request can maintain its own set of additional metadata and have
// its own custom serialization routines. For example, the "configure"
// GetUpdates request will include information about its "origin" in its debug
// info.
class ProtocolEvent {
public:
ProtocolEvent();
virtual ~ProtocolEvent();
// Need a virtual copy constructor to copy this object across threads.
virtual std::unique_ptr<ProtocolEvent> Clone() const = 0;
// Assembles the data exposed through the ProtocolEvent's interface into a
// single base::Value::Dict.
base::Value::Dict ToValue(bool include_specifics) const;
// Returns the time when the request was sent or received.
base::Time GetTimestampForTesting() const;
private:
// Returns the time when the request was sent or received.
virtual base::Time GetTimestamp() const = 0;
// Returns a string representing they type of the request. Should be short.
virtual std::string GetType() const = 0;
// Returns a string representing details of the request. May be verbose. The
// implementer is allowed to return lots of data separated by newlines.
virtual std::string GetDetails() const = 0;
// Returns a base::Value::Dict representing the protobuf message associated
// with this event.
virtual base::Value::Dict GetProtoMessage(bool include_specifics) const = 0;
};
} // namespace syncer
#endif // COMPONENTS_SYNC_ENGINE_EVENTS_PROTOCOL_EVENT_H_
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