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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 COMPONENTS_PROXIMITY_AUTH_LOGGING_LOGGING_H
#define COMPONENTS_PROXIMITY_AUTH_LOGGING_LOGGING_H
#include <sstream>
#include "base/logging.h"
#include "base/macros.h"
namespace proximity_auth {
// Use the PA_LOG() macro for all logging related to Proximity Auth, so the
// system is aware of all logs related to this feature. We display these logs in
// the debug WebUI (chrome://proximity-auth).
//
// PA_LOG() has the same interface as the standard LOG() macro and also creates
// a normal log message of the same severity.
// Examples:
// PA_LOG(INFO) << "Waiting for " << x << " pending requests.";
// PA_LOG(ERROR) << "Request failed: " << error_string;
#define PA_LOG(severity) \
proximity_auth::ScopedLogMessage(__FILE__, __LINE__, \
logging::LOG_##severity).stream()
// Disables all logging while in scope. Intended to be called only from test
// code, to clean up test output.
class ScopedDisableLoggingForTesting {
public:
ScopedDisableLoggingForTesting();
~ScopedDisableLoggingForTesting();
};
// An intermediate object used by the PA_LOG macro, wrapping a
// logging::LogMessage instance. When this object is destroyed, the message will
// be logged with the standard logging system and also added to Proximity Auth
// specific log buffer. You should use the PA_LOG() macro instead of this class
// directly.
class ScopedLogMessage {
public:
ScopedLogMessage(const char* file, int line, logging::LogSeverity severity);
~ScopedLogMessage();
std::ostream& stream() { return stream_; }
private:
const char* file_;
int line_;
logging::LogSeverity severity_;
std::ostringstream stream_;
DISALLOW_COPY_AND_ASSIGN(ScopedLogMessage);
};
} // namespace proximity_auth
#endif // COMPONENTS_PROXIMITY_AUTH_LOGGING_LOGGING_H
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