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// 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 CHROMEOS_NETWORK_NETWORK_EVENT_LOG_H_
#define CHROMEOS_NETWORK_NETWORK_EVENT_LOG_H_
#include <deque>
#include <string>
#include "base/basictypes.h"
#include "base/stringprintf.h"
#include "base/time.h"
#include "chromeos/chromeos_export.h"
namespace chromeos {
// Namespace for functions for logging network events.
namespace network_event_log {
// Used to determine which order to output event entries in GetAsString.
enum StringOrder {
OLDEST_FIRST,
NEWEST_FIRST
};
// Maximum number of event log entries, exported for testing.
CHROMEOS_EXPORT extern const size_t kMaxNetworkEventLogEntries;
// Initializes / shuts down network event logging. Calling Initialize more than
// once will reset the log.
CHROMEOS_EXPORT void Initialize();
CHROMEOS_EXPORT void Shutdown();
// Returns true if network event logging has been initialized.
CHROMEOS_EXPORT bool IsInitialized();
// Adds an entry to the event log. A maximum number of events are recorded
// after which new events replace old ones. Does nothing unless Initialize()
// has been called.
CHROMEOS_EXPORT void AddEntry(const std::string& module,
const std::string& event,
const std::string& description);
// Outputs the log to a formatted string. |order| determines which order to
// output the events. If |max_events| > 0, limits how many events are output.
CHROMEOS_EXPORT std::string GetAsString(StringOrder order, size_t max_events);
// Macros to make logging format more consistent.
#define NET_LOG(module, message) \
::chromeos::network_event_log::AddEntry( \
module, \
std::string(__FILE__) + ":" + ::base::StringPrintf("%d",__LINE__) + \
" (" + std::string(__func__) + ")", \
message)
#define NET_LOG_WARNING(module, message) \
NET_LOG(module, std::string("WARNING:") + message)
#define NET_LOG_ERROR(module, message) \
NET_LOG(module, std::string("ERROR:") + message)
} // namespace network_event_log
} // namespace chromeos
#endif // CHROMEOS_NETWORK_NETWORK_EVENT_LOG_H_
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