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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
// #pragma once is not used in this header.
// This header attempts to enforce the rule that no logging should be done in
// an inline function defined in a header.
// To enforce this "no logging in header" rule, we use #include guards with a validating #else
// clause.
// Also, this header relies on a preprocessor macro to determine the default component for the
// unconditional logging functions severe(), error(), warning() and log(). Disallowing multiple
// inclusion of log.h will ensure that the default component will be set correctly.
#if defined(MONGO_UTIL_LOGV2_H_)
#error \
"mongo/logv2/log.h cannot be included multiple times. " \
"This may occur when log.h is included in a header. " \
"Please check your #include's."
#else // MONGO_UTIL_LOGV2_H_
#define MONGO_UTIL_LOGV2_H_
#include "mongo/base/status.h"
#include "mongo/bson/util/builder.h"
#include "mongo/logv2/log_component.h"
#include "mongo/logv2/log_component_settings.h"
#include "mongo/logv2/log_debug.h"
#include "mongo/logv2/log_detail.h"
#include "mongo/logv2/log_domain.h"
#include "mongo/logv2/log_options.h"
#include "mongo/logv2/log_severity.h"
#include "mongo/logv2/redaction.h"
#include "mongo/util/errno_util.h"
namespace {
#if defined(MONGO_LOGV2_DEFAULT_COMPONENT)
// Provide log component in global scope so that MONGO_LOG will always have a valid component.
// Global log component will be kDefault unless overridden by MONGO_LOGV2_DEFAULT_COMPONENT.
const mongo::logv2::LogComponent MongoLogV2DefaultComponent_component =
MONGO_LOGV2_DEFAULT_COMPONENT;
#else
#error \
"mongo/logv2/log.h requires MONGO_LOGV2_DEFAULT_COMPONENT to be defined. " \
"Please see https://github.com/mongodb/mongo/blob/master/docs/logging.md "
#endif // MONGO_LOGV2_DEFAULT_COMPONENT
} // namespace
// The logging macros below are documented in detail under docs/logging.md
namespace mongo {
// Internal helper to be able to create LogOptions with two arguments from other macros
#define MAKE_OPTIONS_ARG2(ARG0, ARG1) \
::mongo::logv2::LogOptions { \
ARG0, ARG1 \
}
// Internal helper to perform the logging where it requires the MESSAGE to be a compile time string.
#define LOGV2_IMPL(ID, SEVERITY, OPTIONS, FMTSTR_MESSAGE, ...) \
::mongo::logv2::detail::doLog(ID, SEVERITY, OPTIONS, FMT_STRING(FMTSTR_MESSAGE), ##__VA_ARGS__)
/**
* Log with default severity and component.
*
* This macro acts like a function with 4 overloads:
* LOGV2(ID, FMTSTR_MESSAGE, ATTRIBUTES...)
* LOGV2(ID, FMTSTR_MESSAGE, DYNAMIC_ATTRIBUTES)
* LOGV2(ID, FMTSTR_MESSAGE, MESSAGE, ATTRIBUTES...)
* LOGV2(ID, FMTSTR_MESSAGE, MESSAGE, DYNAMIC_ATTRIBUTES)
*
* ID is a unique signed int32 in the same number space as other error codes.
* FMTSTR_MESSAGE is a compile time string constant. Regular "string" is preferred.
* This string may contain libfmt replacement fields.
* MESSAGE is an optional compile time string constant of message without libfmt replacement fields
* ATTRIBUTES zero more more static attributes created with "name"_attr=value expressions
* DYNAMIC_ATTRIBUTES single argument DynamicAttributes object
* no attributes may be passed with "name"_attr=value when this is used
*/
#define LOGV2(ID, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Log(), \
::mongo::logv2::LogOptions{MongoLogV2DefaultComponent_component}, \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with default severity and custom options.
*
* OPTIONS is an expression that is used to construct a LogOptions.
* See LogOptions for available parameters when performing custom logging
*
* See LOGV2() for documentation of the other parameters
*/
#define LOGV2_OPTIONS(ID, OPTIONS, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Log(), \
::mongo::logv2::LogOptions::ensureValidComponent( \
OPTIONS, MongoLogV2DefaultComponent_component), \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with info severity.
*
* See LOGV2() for documentation of the parameters
*/
#define LOGV2_INFO(ID, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Info(), \
::mongo::logv2::LogOptions{MongoLogV2DefaultComponent_component}, \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with info severity and custom options.
*
* See LOGV2_OPTIONS() for documentation of the parameters
*/
#define LOGV2_INFO_OPTIONS(ID, OPTIONS, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Info(), \
::mongo::logv2::LogOptions::ensureValidComponent( \
OPTIONS, MongoLogV2DefaultComponent_component), \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with warning severity.
*
* See LOGV2() for documentation of the parameters
*/
#define LOGV2_WARNING(ID, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Warning(), \
::mongo::logv2::LogOptions{MongoLogV2DefaultComponent_component}, \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with warning severity and custom options.
*
* See LOGV2_OPTIONS() for documentation of the parameters
*/
#define LOGV2_WARNING_OPTIONS(ID, OPTIONS, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Warning(), \
::mongo::logv2::LogOptions::ensureValidComponent( \
OPTIONS, MongoLogV2DefaultComponent_component), \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with error severity.
*
* See LOGV2() for documentation of the parameters
*/
#define LOGV2_ERROR(ID, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Error(), \
::mongo::logv2::LogOptions{MongoLogV2DefaultComponent_component}, \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with error severity and custom options.
*
* See LOGV2_OPTIONS() for documentation of the parameters
*/
#define LOGV2_ERROR_OPTIONS(ID, OPTIONS, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Error(), \
::mongo::logv2::LogOptions::ensureValidComponent( \
OPTIONS, MongoLogV2DefaultComponent_component), \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with fatal severity. fassertFailed(ID) will be performed after writing the log
*
* See LOGV2() for documentation of the parameters
*/
#define LOGV2_FATAL(ID, FMTSTR_MESSAGE, ...) \
do { \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Severe(), \
::mongo::logv2::LogOptions{MongoLogV2DefaultComponent_component}, \
FMTSTR_MESSAGE, \
##__VA_ARGS__); \
fassertFailed(ID); \
} while (false)
/**
* Log with fatal severity. fassertFailedNoTrace(ID) will be performed after writing the log
*
* See LOGV2() for documentation of the parameters
*/
#define LOGV2_FATAL_NOTRACE(ID, FMTSTR_MESSAGE, ...) \
do { \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Severe(), \
MAKE_OPTIONS_ARG2(MongoLogV2DefaultComponent_component, \
::mongo::logv2::FatalMode::kAssertNoTrace), \
FMTSTR_MESSAGE, \
##__VA_ARGS__); \
fassertFailedNoTrace(ID); \
} while (false)
/**
* Log with fatal severity. Execution continues after log.
*
* See LOGV2() for documentation of the parameters
*/
#define LOGV2_FATAL_CONTINUE(ID, FMTSTR_MESSAGE, ...) \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Severe(), \
MAKE_OPTIONS_ARG2(MongoLogV2DefaultComponent_component, \
::mongo::logv2::FatalMode::kContinue), \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
/**
* Log with fatal severity and custom options.
*
* Will perform fassert after logging depending on the fatalMode() setting in OPTIONS
*
* See LOGV2_OPTIONS() for documentation of the parameters
*/
#define LOGV2_FATAL_OPTIONS(ID, OPTIONS, FMTSTR_MESSAGE, ...) \
do { \
auto optionsMacroLocal_ = ::mongo::logv2::LogOptions::ensureValidComponent( \
OPTIONS, MongoLogV2DefaultComponent_component); \
LOGV2_IMPL(ID, \
::mongo::logv2::LogSeverity::Severe(), \
optionsMacroLocal_, \
FMTSTR_MESSAGE, \
##__VA_ARGS__); \
switch (optionsMacroLocal_.fatalMode()) { \
case ::mongo::logv2::FatalMode::kAssert: \
fassertFailed(ID); \
case ::mongo::logv2::FatalMode::kAssertNoTrace: \
fassertFailedNoTrace(ID); \
case ::mongo::logv2::FatalMode::kContinue: \
break; \
}; \
} while (false)
/**
* Log with debug level severity and custom options.
*
* DLEVEL is an integer representing the debug level. Valid range is [1, 5]
*
* See LOGV2_OPTIONS() for documentation of the other parameters
*/
#define LOGV2_DEBUG_OPTIONS(ID, DLEVEL, OPTIONS, FMTSTR_MESSAGE, ...) \
do { \
auto severityMacroLocal_ = ::mongo::logv2::LogSeverity::Debug(DLEVEL); \
auto optionsMacroLocal_ = ::mongo::logv2::LogOptions::ensureValidComponent( \
OPTIONS, MongoLogV2DefaultComponent_component); \
if (::mongo::logv2::LogManager::global().getGlobalSettings().shouldLog( \
optionsMacroLocal_.component(), severityMacroLocal_)) { \
LOGV2_IMPL( \
ID, severityMacroLocal_, optionsMacroLocal_, FMTSTR_MESSAGE, ##__VA_ARGS__); \
} \
} while (false)
/**
* Log with debug level severity.
*
* DLEVEL is an integer representing the debug level. Valid range is [1, 5]
*
* See LOGV2() for documentation of the other parameters
*/
#define LOGV2_DEBUG(ID, DLEVEL, FMTSTR_MESSAGE, ...) \
LOGV2_DEBUG_OPTIONS(ID, \
DLEVEL, \
::mongo::logv2::LogOptions{MongoLogV2DefaultComponent_component}, \
FMTSTR_MESSAGE, \
##__VA_ARGS__)
inline bool shouldLog(logv2::LogComponent logComponent, logv2::LogSeverity severity) {
return logv2::LogManager::global().getGlobalSettings().shouldLog(logComponent, severity);
}
} // namespace mongo
#endif // MONGO_UTIL_LOGV2_H_
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